34 results about "Carboxybenzyl" patented technology

The invention provides a novel synthesis method of hepatitis drug velpatasvir.Two intermediate compounds including a compound 4 and a compound III are utilized to synthesize the velpatasvir, the structures of the two compounds are as shown in the following formulas, wherein PG radical is t-butyloxycarboryl (Boc), carboxybenzyl (Cbz), acetyl, benzoyl or (S)-2-methoxyl acyl carbonyl amino-3-methyl-butyryl group (Moc-L-Valyl).

The invention discloses a synthesis method of a lorcaserin derivative. The synthesis method comprises the following steps: resolving a compound shown as a formula (II) under the action of an optical resolving agent; performing post-treatment to obtain the lorcaserin derivative. In the formula (II), R is H, alkyl with 1-4 carbon atoms, halogen, methoxyl or nitryl; R2 is H, alkyl with 1-4 carbon atoms, methoxyl, carboxybenzyl, t-butyloxycarboryl, methylsulfonyl, tosyl and substituted or unsubstituted benzyl; the optical resolving agent is acyl-substituted tartaric acid. The revolving efficiency is increased by selecting the optical resolving agent having a specific structure, and an optical pure product of which the ee value is over 99 percent can be obtained by means of simple recrystallization; meanwhile, resolving operation is easy, a single solvent is used for resolving, materials are fed into one pot, and the method is suitable for industrial production. The invention further discloses a synthesis method of a salt of the lorcaserin derivative. The obtained salt of the lorcaserin derivative can be applied to preparation of novel weight-reducing medicaments.

The present invention provides a method for synthesizing (R)-N-BOC-3-amino-4-(2,4,5-trifluorophenyl) butyric acid (I) by transaminase method, in which 3-oxo-4- (2,4,5-trifluorophenyl) methyl butyrate (IV) is a starting material, reacted with nitrogen-protected piperazine to obtain 3-oxo-4-(2,4,5-trifluorophenyl) butane Amide intermediate (III); (III) reacts in the presence of amino donor and transaminase, and is converted into 3-amino-4-(2,4,5-trifluorophenyl) butyramide intermediate (II); with ( The amide of II) is hydrolyzed into an acid, and the amino group is protected by BOC to obtain the target intermediate (I); wherein the protecting group of piperazine in formula (III) and formula (II) is C1-4 alkoxycarbonyl, benzyloxycarbonyl or methyl. The invention has the advantages of ingenious design, simple and efficient synthesis route, simple and easy process flow, and environmental protection, and provides a new method for industrial scale production of formula (III).

Belonging to the field of chemical analysis and test, the invention relates to a squarylium cyanine chemical sensor used for Fe<3+> detection and a preparation method thereof. The squarylium cyanine chemical sensor has a symmetrically structured 2, 4, 6-trihydroxy-3, 5-di(p-carboxybenzyl)phenyl)squarylium cyanine compound. The preparation method of the squarylium cyanine chemical sensor used for Fe<3+> detection consists of: preparation of an intermediate 1, 3, 5- trihydroxy-2, 4-di(p-carboxybenzyl)phenyl; and preparation of bis(2, 4, 6-trihydroxy-3, 5-di(p-carboxybenzyl)phenyl)squarylium cyanine. The squarylium cyanine compound provided in the invention has a simple synthesis method and easily controllable reaction conditions, and by means of a simple treatment, a pure product can be obtained. The obtained squarylium cyanine compound has excellent optical performance and optical stability. The squarylium cyanine compound provided in the invention contains carboxyl and hydroxyl groups, has certain water-solubility, and has good selectivity for iron ions.

The invention provides a preparation method and application of a cadmium-based metal organic framework Cd-MOF material. The preparation method is characterized by comprising the following steps: step1, dissolving cadmium nitrate in water, dissolving a ligand 5-(bis(4-carboxylbenzyl)amino isophthalic acid in N,N-diethylformamide, and mixing the ligand 5-(bis(4-carboxylbenzyl)amino isophthalic acidand N,N-diethylformamide with ethanol; step 2, pouring the mixed solution into a polytetrafluoroethylene reaction kettle lining, and carrying out ultrasonic treatment; step 3, putting the reaction kettle into a blast drying oven for heating; and step 4, cooling the reaction kettle to room temperature, and filtering the reaction solution to obtain the yellow petal-shaped Cd-MOF crystal. The synthesis method of the Cd-MOF fluorescent material is simple, the yield and the purity are high, the accurate structure of MOF can be analyzed through single crystal diffraction, and the Cd-MOF fluorescentmaterial synthesized by the method has the characteristics of simple operation, less time consumption and low cost when alpha,beta-unsaturated aldehyde and saturated aldehyde are distinguished and detected.

The invention discloses a mixed-valence europium-doped strontium magnesium lanthanum oxygen-based apatite silicate luminescent material. Strontium magnesium lanthanum silicates are used as a fluorescent body matrix, europium ions are used as doping ions, and the raw materials are strontium carbonate, magnesium carbonate, lanthanum oxide, silicic acid and europium oxide. At the same time, a fluxingagent boric acid and an accelerant are added, wherein the addition amount of the boric acid is 2%-2.5% of the total mass of the raw materials, and the addition amount of the accelerant is 1.5% of thetotal mass of the raw materials. The luminescent material is prepared by a high-temperature solid-phase method. The accelerator comprises the following components: titanium bis(triethanolamine)diisopropoxide, 2,5-difluorobenzylzinc bromide, (3,4-epoxycyclohexyl)ethyltriethoxysilane, (4-carboxybenzyl)methylbicarbamic acid dibenzyl ester, bis(2,2,6,6-tetramethyl-3,5-heptanedionato)calcium, and tetrakis(ethylmethylamino)zirconium. The final luminescent material gives out pure white light, the color rendering index can reach 90, the color temperature is around 4000 K, and the luminescent materialcan be used for indoor lighting.

The invention discloses a preparation method and application of a benzofuran derivate. The preparation method of the benzofuran derivate comprises the following steps: (a) carrying out an organic reaction on a compound shown in formula II with a compound shown in formula III to obtain a compound shown as formula I, wherein X represents chlorine, bromine, iodine, amino, substituted amino, hydroxyl or substituted hydroxyl; the substituted amino is -NR1R2, the substituted hydroxyl is -O-SO2R3, wherein R1 and R2 respectively represent hydrogen, tert-butoxycarbonyl, carboxybenzyl, toluenesulfonyl, trifluoroacetyl, formoxyl and triphenylmethyl; R3 represents methyl, ethyl, propyl, phenyl and p-methylphenyl; and Y represents fluorine, chlorine or bromine. The invention also discloses the application of the prepared benzofuran derivate as an intermediate in preparing Dronedarone.

The invention provides a C-3 substituted-9-deoxidized-9A-aza-9A-high erythromycin A derivative which has a structure shown as formula (I), wherein R1 is H, hydroxyl or methoxyl; R2 is hydroxyl; R3 is an organic matter substituted or unsubstituted by a heteroatom. The heteroatom is one or more of halogen, N, O and S. R4 is H, carboxybenzyl, benzoyl or acetyl. The compound shown by formula (I) is an antibacterial agent and can be used to treat various bacterial and protozoon infections. The invention further relates to an application and a preparation method of the compound, and a composition formed by the compound.

This invention relates to a high-purity and/ or high-content sodium benzylpenicillin sodium solid powder and their medicine combination, as well as preparation method. Such as: sodium salt of Ticarcillin and carbenicillin carboxybenzyl penicillin.

The invention discloses an intermediate for preparing linezolid, which is a compound shown in a structural formula I. The invention further discloses a method for preparing the compound shown in the structural formula I. The method comprises the steps of reacting S)-1-chlorine-3-[(furan-2-methylene)amino]propyl-2-alcohol and N-carboxybenzyl-3-fluorin-4-morpholine phenylamine and generating the compound shown in the structural formula I. According to the method disclosed by the invention, raw and auxiliary materials are low in cost and are easy to obtain; furthermore, the process route is short; the cost is low; the reaction condition is moderate and safe; the device does not have specific requirements; and the method is applied to industrial production.

The invention relates to a melt direct-spinning porous superfine polyester fiber and a preparation method thereof, sodium borohydride is added in esterification reaction of terephthalic acid and ethylene glycol, after esterification reaction, the melt direct-spinning porous superfine polyester fiber is obtained through condensation polymerization and a spinning process; wherein the addition amount of the sodium borohydride is 30-50ppm of the weight of terephthalic acid, and due to the reaction characteristics and chemical selectivity of the sodium borohydride, the sodium borohydride reacts with p-carboxybenzaldehyde in the terephthalic acid before esterification in polyester synthesis to generate p-carboxybenzyl alcohol, so that a net structure formed by the p-carboxybenzaldehyde in the polyester synthesis process is eliminated; according to the melt direct-spinning porous superfine polyester fiber, the filtering performance of polyester melt is improved, the quality of the porous superfine polyester fiber is guaranteed, the replacement period of a filter and a spinning assembly is prolonged, and the prepared melt direct-spinning porous superfine polyester fiber has excellent breaking strength and breaking elongation performance.

The invention discloses a 3-trifluoromethyl-2,5-diazabicyclo[2.2.1] heptane derivant and a preparation method thereof, mainly aiming to solve the technical problems that bridged compounds with structure of 2,5-diazabicyclo[2.2.1] heptane are restrained in extension of a space structure, and the compounds have poor water solubility. The chemical structural formula is as follows in the specification, wherein X is NR1 or O, R1 is a functional group or amino-substituted protective group, and is selected from one of H, C1-10 linear-chain or substituent-side-chain-containing alkyl, benzyl, 2,4-dimethoxybenzyl, 4-methoxybenzyl, tertiarybutoxy carbonyl, carboxybenzyl, alkylacyl, aroyl, alkylsulfonyl or aryl sulfonyl, and R2 is a functional group or amino-substituted protective group, and is selected from one of H, C1-10 linear-chain or substituent-side-chain-containing alkyl, benzyl, 2,4-dimethoxybenzyl, 4-methoxybenzyl, carboxybenzyl, alkylacyl, aroyl, alkylsulfonyl or aryl sulfonyl.

The invention discloses a rivaroxaban intermediate 4-{4-[(5S0-5-(aminomethyl)-2-oxo-1,3-oxazolidine-3-radical]phenyl}morpholine-3-ketohydrochloride preparation method. The method includes the steps: step (1) reacting a compound II and a compound III in organic solvent under the action of alkaline to obtain a compound IV, wherein R1 refers to benzyl, substituent benzyl, aryl or substituent aryl, X refers to halogen and R2 refers to methoxycarbonyl, ethoxycarbonyl, tert-butoxycarbonyl, carboxybenzyl or trityl; and step (2) preparing a compound I by means of hydrolysis reaction of the compound IV in organic solvent under the action of acid. The rivaroxaban intermediate preparation method is simple and convenient in operation, mild in reaction condition, stable in quality, simple in post-processing and suitable for industrial production.

The invention discloses a preparation method of 3-carboxybenzaldehyde. The method comprises the following steps: by using m-toluonitrile as a starting raw material, carrying out a first hydrolysis reaction, and adding an acid to carry out an acidification reaction to obtain m-toluic acid; carrying out chlorination reaction on m-toluic acid to obtain 3-carboxyl benzyl chloride; mixing the 3-carboxyl benzyl chloride and urotropin for an oxidation reaction, then adding glacial acetic acid and water for a second hydrolysis reaction to obtain the 3-carboxybenzaldehyde. According to the method disclosed by the invention, m-toluonitrile with low cost is used as a raw material, the 3-carboxybenzaldehyde is synthesized through a series of processes of hydrolysis, chlorination, oxidation and hydrolysis, and the product purity and yield are relatively high; the method has the advantages of simple and safe process operation, easily available raw materials and low cost and is suitable for industrial production.

Disclosed is process for the preparation of a key Rilpivirine intermediate namely, (E)-4-(2-cyanoethenyl)-2,6-dimethylphenylamine hydrochloride (II) by a process comprising reaction of the tetrafluoroborate salt of the diazonium ion of 2,6-dimethyl-4-amino-1-carboxybenzyl phenylamine (VI) with acrylonitrile in presence of palladium acetate, followed by treatment with an acid and its subsequent conversion to the hydrochloride salt (II), wherein the undesired Z isomer is less than 0.5% and provides Rilpivirine hydrochloride having Z isomer less than 0.1%.

The invention discloses a method for preparing Fmoc-Thr(tBu)-OH, and relates to the field of biochemical engineering. The method comprises the following steps of (1) dissolving, wherein Z-Thr(tBu)-OMeis dissolved; (2) hydrogenolysis, wherein a hydrogen donor, pure water and a catalyst are added to be hydrogenated; (3) filtration, wherein the hydrogenated solution is filtered, and precipitation isremoved; (4) concentration, wherein a benign solvent is removed; (5) saponification, wherein acetone and the pure water are added, the pH value is adjusted to be 11-12 by using an alkaline solution,saponification is carried out to obtain Thr(tBu)-OH; (6) synthesis, wherein the Thr(tBu)-OH and Fmoc-OSu react to generate the Fmoc-Thr(tBu)-OH; and (7) drying. The method for preparing the Fmoc-Thr(tBu)-OH has the advantages that the catalyst is adopted to perform catalytic hydrogenation reaction, it is achieved that Z-Thr(tBu)-OH reacts with 1,3-cyclopentane diene at the normal temperature and pressure, the dehydrogenation of carboxybenzyl is achieved, not only is the production safer, but also the reaction speed is effectively improved, and then the production efficiency is improved.

The invention provides a preparation method of an electrically-induced resistive switching polycatenane crystalline material. The preparation method comprises the following steps: S1, adding a mixed solvent of methanol and water into a glass container, then adding 1,3,6,8-pyrene tetraphosphoric acid, 1,1'-bis(4-carboxyl benzyl)-4,4'-dipyridyl dichloride and a cobalt salt into the mixed solution ofmethanol and water, and carrying out ultrasonic treatment for 5-15 minutes; S2, sealing the glass container, then placing the glass container in an oven, heating the glass container from room temperature to 60-100 DEG C, carrying out heat preservation for 24-36 hours, and cooling the glass container to room temperature; and S3, filtering the solution to obtain solid, washing the solid with distilled water, and naturally drying the solid at room temperature to obtain blocky orange crystals, namely the electrically-induced resistive switching polycatenane crystalline material. An electrically-induced resistive switching organic medium memory prepared from the material is simple in manufacturing process, high in switch ratio, low in operation voltage and stable in performance.

The present invention discloses a proline derivative having a beta-lactamase inhibitory effect. The proline derivative is represented by formula (I), wherein the amide bond in the formula (I) comprises a naturally occurring cis or trans rotamer; R1 is OH or NH2; R2 is o-sulfophenyl, o-sulphonylaminophenyl, m-sulfophenyl, m-sulfonamidophenyl, p-sulfophenyl, p-sulfonamidophenyl, or o-carboxybenzyl.Activity tests show that the proline derivative represented by the formula (I) has a good inhibitory effect on beta-lactamase, especially on NDM-1. By inhibiting of the activity of the beta-lactamase,especially the NDM-1, hydrolysis of beta-lactam antibiotics by the NDM-1 can be reduced or even eliminated, drug resistance caused by the NDM-1 can be alleviated, the curative effect of the antibiotics on bacteria can be restored, and drug-resistant bacterial infections caused by the NDM-1 can be treated.