Synthesis method of cyantraniliprole

Abstract

The invention discloses a synthetic method of cyantraniliprole, and belongs to the technical field of production of cyantraniliprole, and the synthetic method comprises the following steps: step 1, taking o-chlorobenzoic anhydride as an initial raw material, and adding the o-chlorobenzoic anhydride and other raw materials into synthesis equipment; step 2, firstly carrying out amidation reaction on the ester group at the 1-position of the benzene ring and amino to generate an intermediate product, then carrying out amidation reaction on the ester group at the 2-position of the benzene ring, and using 2-amino-2-methylpropionitrile as a reactant; 3, after the two amidation reactions are completed, post-treatment is conducted, a product is purified and crystallized, and finally the cyantraniliprole product is obtained. The raw materials can be slowly pushed in batches, a large amount of raw materials are prevented from entering the reaction cylinder in a concentrated mode, the raw materials are ground before being added, the caked raw materials are prevented from directly entering the reaction cylinder, and efficient reaction is facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of cyantraniliprole production, and in particular relates to a method for synthesizing cyantraniliprole. Background Art

[0002] Cyantraniliprole is a diamide insecticide, belonging to the class of nicotinic acid receptor inhibitor insecticides. Cyantraniliprole has higher efficiency and is applicable to a wider range of crops by changing various polar groups on the benzene ring. It can effectively control Lepidoptera, Hemiptera and Coleoptera pests. The mechanism of action of cyantraniliprole is to bind to the nicotinic acid receptors of insects, open calcium ion channels, and continuously release calcium ions in the cells into the sarcoplasm, causing the pest muscles to continuously contract, manifested as convulsions, paralysis, refusal to feed, and ultimately death. Cyantraniliprole is mainly used to control a variety of pests, including but not limited to Lepidoptera pests such as rice leaf roller, striped stem borer, diamondback moth, armyworm, beet armyworm, and cabbage worm. It is also commonly used to control forestry pests such as pine wood nematodes and gypsy moths.

[0003] When synthesizing the existing cyantraniliprole, o-chlorobenzoic anhydride is used as a raw material, because o-chlorobenzoic anhydride is easy to agglomerate. This is because o-chlorobenzoic anhydride is formed by the dehydration reaction of dibasic acid, and it is easy to absorb moisture in the air to generate dibasic acid. When the anhydride absorbs water, the generated dibasic acid cannot be dissolved in the original anhydride, resulting in turbidity, precipitation, and even agglomeration. Therefore, when it is added to the reaction as a raw material, the agglomerated o-chlorobenzoic anhydride will affect the efficient progress of the reaction. The existing synthesis equipment lacks measures for grinding and crushing the agglomerated raw materials. For this reason, we propose a method for synthesizing cyantraniliprole. Summary of the invention

[0004] In order to solve the above problems, the purpose of the present invention is to provide a method for synthesizing cyantraniliprole.

[0005] To achieve the above object, the present invention provides a method for synthesizing cyantraniliprole, comprising the following steps:

[0006] Step 1: Taking o-chlorobenzoic anhydride as the starting material, adding it together with other raw materials into the synthesis equipment;

[0007] Step 2: First, the ester group at the 1-position of the benzene ring undergoes an amidation reaction with the amino group to generate an intermediate product, and then, an amidation reaction is performed on the ester group at the 2-position of the benzene ring, using 2-amino-2-methylpropionitrile as a reactant;

[0008] Step 3: After completing the two amidation reactions, post-treatment is performed to purify and crystallize the product to finally obtain the cyantraniliprole product;

[0009] The synthesis equipment in step 1 includes two support plates, a reaction barrel is fixedly connected between the two support plates, a stirring assembly is provided inside the reaction barrel, and the raw materials are stirred and mixed by the stirring assembly, a feed control assembly is provided at the top of the reaction barrel, a feed assembly is provided on the top of the feed control assembly, and the feed assembly feeds the raw materials into the reaction barrel, a grinding assembly is provided inside the feed assembly, and the grinding assembly grinds the agglomerated raw materials, and a driving assembly is provided on one side of the reaction barrel, and the driving assembly simultaneously controls the operation of the stirring assembly, the feeding assembly and the feeding control assembly.

[0010] Preferably, the stirring assembly includes two cross bars fixedly connected to the inner wall of the reaction cylinder, a bearing is fixedly connected between the two cross bars, a first vertical shaft is sleeved inside the bearing, a first driven bevel gear is fixedly sleeved outside the first vertical shaft, a plurality of stirring rods fixedly connected to the first vertical shaft are arranged in an array below the first driven bevel gear, and a plurality of scrapers are fixedly connected to the bottom end of the first vertical shaft.

[0011] Preferably, the feeding assembly includes two fixed plates fixedly connected to the top of the feeding control assembly, the top of the fixed plate is fixedly connected to a grinding cylinder, one side outer wall of the grinding cylinder is fixedly connected to a diagonal support plate, the middle of the diagonal support plate is fixedly connected to a vertical rod, the bottom end of the vertical rod is fixedly connected to a squeezing ball, the top of the diagonal support plate is fixedly connected to a feeding pipe, one side of the top of the feeding pipe is fixedly connected to a feeding hopper connected thereto, a horizontal axis is provided for internal rotation of the feeding pipe, a spiral auger is provided on the external fixed sleeve of the horizontal axis, and one end of the horizontal axis is fixedly connected to a first active bevel gear.

[0012] Preferably, the driving assembly includes a mounting plate fixedly connected to one of the support plates, a dual-axis motor is fixedly connected to one side of the mounting plate, a transmission shaft is fixedly connected to the left output shaft of the dual-axis motor, one end of the transmission shaft extending into the interior of the reaction cylinder is fixedly connected to the second active bevel gear, and the second active bevel gear is meshed with the first driven bevel gear for transmission, a cam is provided on the external fixed sleeve of the transmission shaft, and the cam is in intermittent extrusion contact with the extrusion ball, a thread opened on the transmission shaft is provided on the side of the cam away from the second active bevel gear, pulleys are fixedly connected to the right output shaft and the horizontal shaft of the dual-axis motor, and belts are provided on the external sleeves of the two pulleys.

[0013] Preferably, the feed control assembly includes a fixed frame fixedly sleeved on the top of the reaction cylinder, and a fixed plate is fixedly connected to the top of the fixed frame, the fixed frame is communicated with the reaction cylinder, a sealing plate is movable sleeved inside the fixed frame, a feed hole is provided on the sealing plate, a push-pull plate is fixedly connected to one end of the sealing plate, and the push-pull plate cooperates with the thread, a through hole is provided on the push-pull plate, and a vertical rod passes through the through hole, and a spring is fixedly connected between the push-pull plate and the mounting plate.

[0014] Preferably, the grinding assembly includes two push rod motors fixedly connected to the top of one of the support plates, the output shaft of the push rod motor is fixedly connected to a connecting rod, the top of the connecting rod is fixedly connected to a lifting plate, a second vertical shaft is rotatably provided on one side of the bottom of the lifting plate, a second driven bevel gear is provided on the outer fixed sleeve of the second vertical shaft, and the second driven bevel gear is meshed with the first active bevel gear for transmission, the bottom end of the second vertical shaft is fixedly connected to a grinding head, the bottom end of the grinding head is fixedly connected to a sealing column, and the sealing column is movably inserted into the bottom of the grinding cylinder.

[0015] Preferably, the bottom of the grinding cylinder is inserted into the top of the reaction cylinder, and a feeding hole connected to the feed hopper is opened on one side of the top of the feeding pipe.

[0016] Preferably, the distance between the bottom slope of the grinding head and the inner wall slope of the grinding cylinder is 2-4 mm.

[0017] Preferably, a valve is provided at the bottom of the reaction cylinder.

[0018] The synthesis method of cyantraniliprole proposed by the present invention can bring the following beneficial effects:

[0019] 1. The driving component drives the stirring component to work, and the stirring component stirs and mixes the raw materials in the reaction cylinder;

[0020] 2. The driving component also drives the feeding component and the feeding control component to work. The feeding component pushes the raw materials slowly and orderly, so that the raw materials enter the grinding cylinder first, and then fall into the reaction cylinder through the feeding control component after grinding, so as to avoid a large amount of raw materials falling together;

[0021] 3. The feeding assembly drives the grinding assembly to work, and the grinding assembly will fully grind the raw materials to prevent agglomerated raw materials from entering the reaction cylinder;

[0022] In summary, the present solution has a simple structure and novel design. It can not only push the raw materials slowly in batches to avoid a large amount of raw materials entering the reaction tube, but also grind the raw materials before adding to avoid agglomerated raw materials directly entering the reaction tube, which is conducive to the efficient reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0024] In the attached picture:

[0025] Figure 1 It is a front view structural schematic diagram of the present invention.

[0026] Figure 2 It is a side structural schematic diagram of the present invention.

[0027] Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention.

[0028] Figure 4 It is a schematic diagram of the three-dimensional structure from the first viewing angle of the present invention.

[0029] Figure 5 It is a schematic diagram of the three-dimensional structure from a second viewing angle of the present invention.

[0030] Figure 6 It is a schematic diagram of the three-dimensional structure of the stirring assembly of the present invention.

[0031] Figure 7 It is a partially cutaway three-dimensional structural schematic diagram of the feed assembly of the present invention.

[0032] Figure 8 It is a schematic diagram of the three-dimensional structure of the driving component of the present invention.

[0033] Fig. 9 It is a schematic diagram of a partially exploded three-dimensional structure of a feed control component of the present invention.

[0034] Fig.10 It is a schematic diagram of the three-dimensional structure of the grinding assembly of the present invention.

[0035] In the figure: 1 support plate, 2 reaction cylinder, 3 stirring assembly, 301 cross bar, 302 bearing, 303 first vertical axis, 304 first driven bevel gear, 305 stirring rod, 306 scraper, 4 feeding assembly, 401 grinding cylinder, 402 fixed plate, 403 diagonal support plate, 404 vertical rod, 405 squeeze ball, 406 feeding pipe, 407 feeding hopper, 408 cross shaft, 409 spiral auger, 410 first driving bevel gear, 5 driving assembly, 501 mounting plate, 502 double Shaft motor, 503 transmission shaft, 504 second active bevel gear, 505 cam, 506 thread, 507 pulley, 508 belt, 6 feed control assembly, 601 fixed frame, 602 sealing plate, 603 feed hole, 604 push-pull plate, 605 through hole, 606 spring, 7 grinding assembly, 701 push rod motor, 702 connecting rod, 703 lifting plate, 704 second vertical shaft, 705 second driven bevel gear, 706 grinding head, 707 sealing column, 8 valve. DETAILED DESCRIPTION

[0036] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in an exemplary manner in conjunction with the accompanying drawings.

[0037] In the description of the present invention, it is necessary to understand that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present invention, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one scheme", "some schemes", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the scheme or example are included in at least one scheme or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same scheme or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more schemes or examples in a suitable manner.

[0041] like Figures 1 to 10 As shown, an embodiment of the present invention provides a method for synthesizing cyantraniliprole, comprising the following steps:

[0042] Step 1: Taking o-chlorobenzoic anhydride as the starting material, adding it together with other raw materials into the synthesis equipment;

[0043] Step 2: First, the ester group at the 1-position of the benzene ring undergoes an amidation reaction with the amino group to generate an intermediate product, and then, an amidation reaction is performed on the ester group at the 2-position of the benzene ring, using 2-amino-2-methylpropionitrile as a reactant;

[0044] Step 3: After completing the two amidation reactions, post-treatment is performed to purify and crystallize the product to finally obtain the cyantraniliprole product;

[0045] The synthesis equipment in step one includes two support plates 1, a reaction tube 2 is fixedly connected between the two support plates 1, a stirring assembly 3 is provided inside the reaction tube 2, the raw materials are stirred and mixed by the stirring assembly 3, a feed control assembly 6 is provided at the top of the reaction tube 2, a feed assembly 4 is provided on the top of the feed control assembly 6, the feed assembly 4 feeds the raw materials into the reaction tube 2, a grinding assembly 7 is provided in the feed assembly 4, the grinding assembly 7 grinds the agglomerated raw materials, a drive assembly 5 is provided on one side of the reaction tube 2, and the drive assembly 5 simultaneously controls the operation of the stirring assembly 3, the feed assembly 4 and the feed control assembly 6.

[0046] like Figure 5 and Figure 6 As shown, the stirring assembly 3 includes two cross bars 301 fixedly connected to the inner wall of the reaction tube 2, a bearing 302 is fixedly connected between the two cross bars 301, a first vertical shaft 303 is sleeved inside the bearing 302, a first driven bevel gear 304 is fixedly sleeved outside the first vertical shaft 303, a plurality of stirring rods 305 fixedly connected to the first vertical shaft 303 are arranged in an array below the first driven bevel gear 304, a plurality of scrapers 306 are fixedly connected to the bottom end of the first vertical shaft 303, the first driven bevel gear 304 drives the first vertical shaft 303 to rotate, and the first vertical shaft 303 drives the stirring rod 305 and the scraper 306 to rotate, so that the raw materials can be stirred and mixed in the reaction tube 2.

[0047] like Figure 4 and Figure 7As shown, the feed assembly 4 includes two fixed plates 402 fixedly connected to the top of the feed control assembly 6, the top of the fixed plate 402 is fixedly connected to a grinding cylinder 401, one side of the outer wall of the grinding cylinder 401 is fixedly connected to an inclined support plate 403, the middle of the inclined support plate 403 is fixedly connected to a vertical rod 404, the bottom end of the vertical rod 404 is fixedly connected to a squeezing ball 405, the top of the inclined support plate 403 is fixedly connected to a feed pipe 406, the top side of the feed pipe 406 is fixedly connected to a feed hopper 407 connected thereto, and the feed pipe 406 is internally provided with a horizontal axis 408 for rotation, and the outer side of the horizontal axis 408 is fixedly connected to the feed pipe 406. A spiral auger 409 is provided in the fixed sleeve, and one end of the horizontal shaft 408 is fixedly connected to the first active bevel gear 410. The rotation of the horizontal shaft 408 will drive the spiral auger 409 to rotate. The rotation of the spiral auger 409 will continuously push the raw materials dropped in the feed hopper 407 to the left, and finally the raw materials will slowly enter the grinding cylinder 401. The squeezing ball 405 will be squeezed to drive the diagonal support plate 403 to vibrate through the vertical rod 404, and the diagonal support plate 403 will drive the grinding cylinder 401 and the feeding pipe 406 to vibrate, which is not only beneficial to the vibration feeding of the raw materials, but also beneficial to vibration grinding to prevent the raw materials from adhering to the inner wall.

[0048] like Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the driving assembly 5 includes a mounting plate 501 fixedly connected to one of the support plates 1, a dual-axis motor 502 is fixedly connected to one side of the mounting plate 501, a transmission shaft 503 is fixedly connected to the left output shaft of the dual-axis motor 502, and one end of the transmission shaft 503 extending into the interior of the reaction tube 2 is fixedly connected to a second active bevel gear 504, and the second active bevel gear 504 is meshed with the first driven bevel gear 304 for transmission, and a cam 505 is provided on the outer fixed sleeve of the transmission shaft 503, and the cam 505 is intermittently squeezed and contacted with the squeezing ball 405, and the cam 505 is away from the first driven bevel gear 304. One side of the second active bevel gear 504 is provided with a thread 506 opened on the transmission shaft 503, and the right end output shaft of the dual-axis motor 502 and the horizontal shaft 408 are fixedly connected with pulleys 507, and the outer sleeves of the two pulleys 507 are provided with belts 508. The dual-axis motor 502 drives the transmission shaft 503 to rotate, and the transmission shaft 503 drives the second active bevel gear 504 to rotate, and the second active bevel gear 504 drives the first driven bevel gear 304 meshing therewith to rotate. At the same time, the dual-axis motor 502 also drives the horizontal shaft 408 to rotate through the pulley 507 and the belt 508.

[0049] like Figure 8 and Fig. 9As shown, the feed control assembly 6 includes a fixed frame 601 fixedly sleeved on the top of the reaction tube 2, and the fixed plate 402 is fixedly connected to the top of the fixed frame 601, the fixed frame 601 is communicated with the reaction tube 2, and the internal movable sleeve of the fixed frame 601 is provided with a sealing plate 602, and the sealing plate 602 is provided with a feed hole 603, one end of the sealing plate 602 is fixedly connected with a push-pull plate 604, and the push-pull plate 604 cooperates with the thread 506, and the push-pull plate 604 is provided with a through hole 605, and the vertical rod 404 passes through the through hole 605, and a spring 606 is fixedly connected between the push-pull plate 604 and the mounting plate 501, and the thread 506 on the transmission shaft 503 will drive the push-pull plate 604 to move when rotating, and the push-pull plate 604 will compress or stretch the spring 606 when moving, and the push-pull plate 604 also drives the sealing plate 602 to move, and the feed hole 603 on the sealing plate 602 will be connected with the reaction tube 2 for feeding.

[0050] like Figure 7 and Fig.10 As shown, the grinding assembly 7 includes two push rod motors 701 fixedly connected to the top of one of the support plates 1, the output shaft of the push rod motor 701 is fixedly connected to a connecting rod 702, the top of the connecting rod 702 is fixedly connected to a lifting plate 703, a second vertical shaft 704 is rotatably provided on one side of the bottom of the lifting plate 703, a second driven bevel gear 705 is fixedly sleeved on the outside of the second vertical shaft 704, and the second driven bevel gear 705 is meshed with the first active bevel gear 410 for transmission, a grinding head 706 is fixedly connected to the bottom end of the second vertical shaft 704, and a sealing column 70 is fixedly connected to the bottom end of the grinding head 706 7, and the sealing column 707 is movably inserted into the bottom of the grinding cylinder 401, the rotation of the first active bevel gear 410 will drive the second driven bevel gear 705 meshing therewith to rotate, and the second driven bevel gear 705 will drive the second vertical shaft 704 to rotate, and the second vertical shaft 704 will drive the grinding head 706 to rotate in the grinding cylinder 401, so as to grind the agglomerated raw materials, and when the push rod motor 701 drives the lifting plate 703 to rise, the lifting plate 703 will drive the grinding head 706 and the sealing column 707 to rise through the second vertical shaft 704, so as to release the sealing of the grinding cylinder 401, thereby facilitating the raw materials to fall.

[0051] like Figure 3 and Figure 7 As shown, the bottom of the grinding cylinder 401 is inserted into the top of the reaction cylinder 2, and a feeding hole connected to the feed hopper 407 is opened on one side of the top of the feed pipe 406. The raw material enters the feed pipe 406 from the feed hopper 407 through the feeding hole.

[0052] like Figure 3 , Figure 7 and Fig.10 As shown, the distance between the bottom slope of the grinding head 706 and the inner wall slope of the grinding cylinder 401 is 2-4 mm.

[0053] like Figure 3 As shown, a valve 8 is provided at the bottom of the reaction tube 2, and the material can be discharged by opening the valve 8.

[0054] Working principle: The raw material is in the feed hopper 407. Before feeding, the push-pull plate 604 is located at the rightmost side of the thread 506. Figure 3 In the state shown, the push-pull plate 604 compresses the spring 606, and the push-pull plate 604 and the thread 506 are in a semi-engaged state, so the transmission shaft 503 can rotate continuously. At this time, the double-axis motor 502 also drives the horizontal shaft 408 to rotate through the pulley 507 and the belt 508. The rotation of the horizontal shaft 408 will drive the spiral auger 409 to rotate. The rotation of the spiral auger 409 will continuously push the raw materials falling in the feed hopper 407 to the left, and finally the raw materials slowly enter the grinding cylinder 401. The horizontal shaft 408 also drives the first active bevel gear 410 to rotate, and the first active bevel gear 410 drives the second driven bevel gear 705 meshed with it to rotate. , the second driven bevel gear 705 drives the second vertical shaft 704 to rotate, and the second vertical shaft 704 drives the grinding head 706 to rotate in the grinding cylinder 401, so as to grind the agglomerated raw materials. When the grinding is completed, the push rod motor 701 drives the lifting plate 703 to rise, and the lifting plate 703 drives the grinding head 706 and the sealing column 707 to rise through the second vertical shaft 704, so as to release the sealing column 707 from the bottom of the grinding cylinder 401, thereby facilitating the raw material dropping. Then, the double-axis motor 502 drives in the reverse direction again. At this time, under the elastic force of the spring 606, the push-pull plate 604 will quickly mesh with the thread 506. This will drive the push-pull plate 604 to move to the left. When the push-pull plate 604 moves to the middle of the thread 506, the spring 606 is at its original length. When the push-pull plate 604 continues to move to the left, the spring 606 is stretched. When the push-pull plate 604 moves to the leftmost side of the thread 506, the spring 606 makes the push-pull plate 604 semi-engaged with the thread 506 again under the tension of the spring 606. At this time, the transmission shaft 503 can continue to rotate. The movement of the push-pull plate 604 will drive the sealing plate 602 to move to the left. The feed hole 603 on the sealing plate 602 will be connected to the reaction cylinder 2 for feeding, and the squeezing ball 405 will be squeezed through the vertical rod 40 4 drives the inclined support plate 403 to vibrate, and the inclined support plate 403 drives the grinding cylinder 401 and the feeding pipe 406 to vibrate, which is not only beneficial to the vibration feeding of the raw materials, but also beneficial to the vibration grinding, and can also vibrate the materials to prevent the raw materials from adhering to the inner wall. When the raw materials fall into the reaction cylinder 2, the transmission shaft 503 drives the second active bevel gear 504 to rotate, and the second active bevel gear 504 drives the first driven bevel gear 304 meshing therewith to rotate, and the first driven bevel gear 304 drives the first vertical shaft 303 to rotate, and the first vertical shaft 303 drives the stirring rod 305 and the scraper 306 to rotate, so that the raw materials can be stirred and mixed in the reaction cylinder 2.

[0055] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0056] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A method for synthesizing cyantraniliprole, characterized in that: The following steps are involved: Step 1: Taking o-chlorobenzoic anhydride as the starting material, adding it together with other raw materials into the synthesis equipment; Step 2: First, the ester group at the 1-position of the benzene ring undergoes an amidation reaction with the amino group to generate an intermediate product, and then, an amidation reaction is performed on the ester group at the 2-position of the benzene ring, using 2-amino-2-methylpropionitrile as a reactant; Step 3: After completing the two amidation reactions, post-treatment is performed to purify and crystallize the product to finally obtain the cyantraniliprole product; The synthesis equipment in step 1 comprises two support plates (1), a reaction barrel (2) is fixedly connected between the two support plates (1), a stirring assembly (3) is arranged inside the reaction barrel (2), and the raw materials are stirred and mixed by the stirring assembly (3), a feed control assembly (6) is arranged at the top of the reaction barrel (2), a feed assembly (4) is arranged on the top of the feed control assembly (6), and the feed assembly (4) feeds the raw materials into the reaction barrel (2), a grinding assembly (7) is arranged inside the feed assembly (4), and the grinding assembly (7) grinds the agglomerated raw materials, and a driving assembly (5) is arranged on one side of the reaction barrel (2), and the driving assembly (5) simultaneously controls the operation of the stirring assembly (3), the feed assembly (4) and the feed control assembly (6).

2. The method for synthesizing cyantraniliprole according to claim 1, wherein: The stirring assembly (3) comprises two cross bars (301) fixedly connected to the inner wall of the reaction tube (2), a bearing (302) fixedly connected between the two cross bars (301), a first vertical shaft (303) sleeved inside the bearing (302), a first driven bevel gear (304) fixedly sleeved outside the first vertical shaft (303), a plurality of stirring rods (305) fixedly connected to the first vertical shaft (303) arranged in an array below the first driven bevel gear (304), and a plurality of scrapers (306) fixedly connected to the bottom end of the first vertical shaft (303).

3. The method for synthesizing cyantraniliprole according to claim 2, wherein: The feeding assembly (4) comprises two fixed plates (402) fixedly connected to the top of the feeding control assembly (6); a grinding cylinder (401) is fixedly connected to the top of the fixed plate (402); a diagonal support plate (403) is fixedly connected to the outer wall of one side of the grinding cylinder (401); a vertical rod (404) is fixedly connected to the middle of the diagonal support plate (403); a squeezing ball (405) is fixedly connected to the bottom end of the vertical rod (404); a feeding pipe (406) is fixedly connected to the top of the diagonal support plate (403); a feeding hopper (407) connected to the feeding pipe (406) is fixedly connected to one side of the top of the feeding pipe (406); a horizontal shaft (408) is rotatably provided inside the feeding pipe (406); a spiral auger (409) is fixedly provided on the outer fixed sleeve of the horizontal shaft (408); and a first active bevel gear (410) is fixedly connected to one end of the horizontal shaft (408).

4. The method for synthesizing cyantraniliprole according to claim 3, wherein: The driving assembly (5) comprises a mounting plate (501) fixedly connected to one of the support plates (1); a dual-axis motor (502) is fixedly connected to one side of the mounting plate (501); a transmission shaft (503) is fixedly connected to the left output shaft of the dual-axis motor (502); one end of the transmission shaft (503) extending into the interior of the reaction cylinder (2) is fixedly connected to a second active bevel gear (504); and the second active bevel gear (504) is meshed with the first driven bevel gear (304) to transmit the second active bevel gear (504) to the first driven bevel gear (304). The transmission shaft (503) is movable, the outer fixed sleeve of the transmission shaft (503) is provided with a cam (505), and the cam (505) is in intermittent extrusion contact with the extrusion ball (405), and the side of the cam (505) away from the second active bevel gear (504) is provided with a thread (506) opened on the transmission shaft (503), the right end output shaft and the horizontal shaft (408) of the dual-axis motor (502) are fixedly connected with pulleys (507), and the outer sleeves of the two pulleys (507) are provided with belts (508).

5. The method for synthesizing cyantraniliprole according to claim 4, characterized in that: The feed control assembly (6) comprises a fixed frame (601) fixedly sleeved on the top of the reaction cylinder (2), and a fixed plate (402) is fixedly connected to the top of the fixed frame (601), the fixed frame (601) is communicated with the reaction cylinder (2), a sealing plate (602) is movably sleeved inside the fixed frame (601), a feed hole (603) is provided on the sealing plate (602), a push-pull plate (604) is fixedly connected to one end of the sealing plate (602), and the push-pull plate (604) is matched with the thread (506), a through hole (605) is provided on the push-pull plate (604), and a vertical rod (404) passes through the through hole (605), and a spring (606) is fixedly connected between the push-pull plate (604) and the mounting plate (501).

6. The method for synthesizing cyantraniliprole according to claim 5, characterized in that: The grinding assembly (7) comprises two push rod motors (701) fixedly connected to the top of one of the support plates (1); the output shaft of the push rod motor (701) is fixedly connected to a connecting rod (702); the top end of the connecting rod (702) is fixedly connected to a lifting plate (703); a second vertical shaft (704) is rotatably provided on one side of the bottom of the lifting plate (703); a second driven bevel gear (705) is fixedly sleeved on the outside of the second vertical shaft (704); and the second driven bevel gear (705) is meshed with the first active bevel gear (410) for transmission; a grinding head (706) is fixedly connected to the bottom end of the second vertical shaft (704); a sealing column (707) is fixedly connected to the bottom end of the grinding head (706); and the sealing column (707) is movably inserted into the bottom of the grinding cylinder (401).

7. The method for synthesizing cyantraniliprole according to claim 6, characterized in that: The bottom of the grinding cylinder (401) is inserted into the top of the reaction cylinder (2), and a feeding hole connected to the feeding hopper (407) is opened on one side of the top of the feeding pipe (406).

8. The method for synthesizing cyantraniliprole according to claim 7, characterized in that: The distance between the bottom slope of the grinding head (706) and the inner wall slope of the grinding cylinder (401) is 2-4 mm.

9. The method for synthesizing cyantraniliprole according to claim 1, characterized in that: A valve (8) is provided at the bottom of the reaction cylinder (2).

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