210 results about "Sulfuryl chloride" patented technology

The invention provides a chloration method for phenoxyacetic acid and derivatives thereof, which comprises the following steps that: raw materials of the phenoxyacetic acid or the derivatives of the phenoxyacetic acid and chlorinating agents take reaction at a certain temperature in organic solvents under the effect of catalysts, wherein the chlorinating agents can be chlorine gas, sodium hypochlorite, calcium hypochlorite and sulfuryl chloride, the catalysts can be lewis acid and sulfurated substances, and solvents can be dichloromethane, dichloroethane, trichloromethane, carbon tetrachloride, formic acid, ethyl acetate, benzene, toluene, dimethylbenzene, chlorobenzene and o-dichlorobenzene. The method has the advantages that the operation can be carried out under the waterless condition, the generation of a large amount of industrial waste water is avoided, the used catalysts are safe and are easy to obtain, the solvents can be cyclically used, and the industrialization is easy.

The invention discloses a preparation method for Aspoxicillin. D-aspartic acid is added into a mixture liquid of sulfuryl chloride and carbinol under a low temperature of zero to prepare D-aspartic acid methyl ester hydrochloride; the obtained D-aspartic acid methyl ester hydrochloride and triethylamine are reacted in ethanol to obtain D-aspartic acid methyl ester educt; the D-aspartic acid methyl ester educt and methylamine aqueous liquid with a concentration of 40 percent are reacted in a room temperature to prepare aspartic formamide; the aspartic formamide, ethyl acetoacetate and potassium hydroxide are reacted in isopropanol to prepare diene salt (D-2-amino-3N-methylamino oxo-propionic acid diene formamide); the diene salt and pivaloyl chloride are reacted in acetone under the catalysis of pyridine to obtain active anhydride; then the active anhydride is condensed and further protected by deacidification to obtain a target product-crude product of Aspoxicillin. The preparation method for Aspoxicillin has the advantages of cheap and easily-obtained reagent, lower toxicity and lower environment pressure, stable and simple technological operation and high yield.

The present invention provides a production method of benzenesulfonyl chloride. It is characterized by that said invention uses benzene and chlorosulfonic acid as raw material, and makes them undergo the processes of sulfonation reaction, hydrolytic dilution, standing still and layer separation and reduced pressure distillation so as to obtain the invented product. Said invention also provides the concrete steps of every process and its concrete requirements.

The invention discloses a preparation method of vonoprazan fumarate. The preparation method includes: S1, dissolving 5-(2-fluorophenyl)-1H-pyrrole-3-carboxaldehyde (I) in organic solvent, mixing with methylamine alcohol solution for 6-8h to generate imine, reducing with metal borohydride for 1-2h, and performing post-treatment to obtain a compound according to a formula II; S2, dissolving the compound prepared in the step S1 according to the formula II, in organic solvent, performing ice bathing and mixing with Boc anhydride to allow reaction for 1-2h, and performing post-treatment to obtain a compound according to a formula III; S3, dissolving the compound prepared in the step S2 according to the formula III, in organic solvent, adding sodium hydride and crown ether, adding 3-pyridine sulfuryl chloride, mixing for reaction for 1-2h, and performing post-treatment to obtain a compound according to a formula IV; S4, reacting the compound prepared in the step S3 according to the formula IV, in trifluoroacetic acid and methylene dichloride solution to obtain a compound according to a formula V; and S5, dissolving the compound prepared in the step S4 according to the formula V, in organic solvent to be salified with fumaric acid, thereby obtaining the vonoprazan fumarate (VI). The preparation method has few side reactions and high intermediate purity and allows simple post-treatment.

The invention discloses a preparation method for coproducing bis(chlorosulfonyl)imide and lithium bis(fluorosulfonyl)imide, which comprises the following steps: S1, adding sulfuryl chloride into a first solvent, dropwisely adding octamethylcyclotetrasilazane for reaction, and carrying out purification to obtain bis(chlorosulfonyl)imide; S2, taking bis(chlorosulfonyl)imide and anhydrous hydrofluoric acid to react under the action of a catalyst to obtain bis(fluorosulfonyl)amide; and S3, taking the bis(fluorosulfonyl)amide and lithium fluoride to react in a second solvent, and carrying out purification to obtain the lithium bis(fluorosulfonyl)imide. According to the invention, proper raw materials are selected and matched with a solvent method to co-produce bis(chlorosulfonyl)imide and lithium bis(fluorosulfonyl)imide. The method has the advantages of simple preparation process, few and recyclable byproducts, high yield, no water participation in the production process, high purity of the obtained bis(chlorosulfonyl)imide and lithium bis(fluorosulfonyl)imide, no wastewater generation and green and environment-friendly process route, and is suitable for industrial production.

The invention discloses a method for preparing graphene oxide grafted with a thermotropic liquid crystal compound with an end group containing an epoxy group. P-phthanoyl chloride, p-hydroxybenzoic acid, thionyl chloride, diethylene glycol and glycidol are used as raw materials to react to obtain the thermotropic liquid crystal compound with the end group containing the epoxy group with pyridine and lauric acid butyltin as catalyst; thionyl chloride is added into graphene oxide mixed liquid formed by ultrasonic dispersion to react to obtain acyl chlorination graphene oxide; and acyl chlorination graphene oxide and thermotropic liquid crystal compound with the end group containing the epoxy group are used as raw materials and react with pyridine as catalyst to obtain graphene oxide grafted with the thermotropic liquid crystal compound with the end group containing the epoxy group. The graphite oxide is obtained by using Hummers oxidation method with chemical pure crystalline flake graphite as a raw material. Other chemical solvents are analytically pure. The raw materials are wide in source, simple in preparation process, free of pollution, low in cost and favorable for industrial large-scale production.

The invention discloses a preparation method of 3,5-dimethyl-4-chlorophenol, which takes tetrachloroethylene as a solvent, benzyl thiophenol and aluminium chloride as cocatalysts, sulfuric chloride as a chloridizing agent, orientation chlorination is carried out through two phases of low-temperature chlorination and high-temperature chlorination, the mass ratio of tetrachloroethylene to MX is 0.5-4: 1; the mass ratio of the cocatalyst to MX is 2.5-6.5:1000; at low temperature chlorination phase, the mass ratio of sulfuric chloride dropping amount to MX is 0.9-1.2: 1; at high temperature chlorination phase, the mass ratio of sulfuric chloride dropping amount to MX is 0.1-0.2: 1; the temperature at the low temperature chlorination phase is controlled at 30-45 DEG C, chlorination is carried out for 4-6 hours; the temperature at high temperature chlorination phase is controlled at 50-65 DEG C, and chlorination is carried out for 1-2 hours, insulation reaction is carried out after the dropping process of sulfuric chloride is completed, tail gas is removed for 1-2 hours, and steps of water-washing layering, cooling and crystallizing, centrifuging and washing, and drying to obtain the product. According to the method, the conversion rate can reach more than 95%, finished product PCMX yield is increased, and the by-product can be effectively reduced.

The invention discloses a preparation process of chlorinated phenol; phenol is used as a raw material, a mixture of arbitrary one of diphenyl sulfide and dimethyl sulfide, arbitrary one of acetic acid and toluene sulfonic acid and arbitrary one of aluminum trichloride and ferric trichloride is used as a catalyst, a chlorinated phenol crude product is generated through sulfuryl chloride chlorination, and a target product is obtained by melt crystallization. The mixed catalyst used in the reaction has a positioning function, the content of p-chlorophenol in the monochlorophenol mixture generated from the reaction is greater than 83%, the content of 2,4-dichlorophenol in dichlorinated phenol generated from the reaction is greater than 98%, the amount of trichlorinated phenol impurities generated from the reaction is reduced, and 2,4,6-dichlorophenol with the content greater than 99% and the total yield more than or equal to 98% is obtained without purification treatment; moreover, energy consumption is greatly reduced, and high-content p-chlorophenol and high-quality 2,4-dichlorophenol can be produced at the same time.

An endotoxic adsorpting method for treating endotoxemia and anaphylactic reaction caused by endotoxemia is prepared through activating the hydroxy group of agarose gel or DVA as carrier by cyanogen bromide or epoxy chloropropane or sulfuryl chloride, and adding polymyxin solution.

Processes for the production of chlorinated alkanes are provided. The present processes comprise reacting one or more mono- and/or dichloroalkanes to form tri-, tetra- and/or pentachloroalkanes, with high regioselectivity. In those embodiments wherein a dichloroalkane is desirably utilized, it may advantageously be a vicinal dichloroalkane. Further, only one catalyst is utilized. The present processes make use of sulfuryl chloride as a chlorinating agent, rather than a gaseous chlorinating agent such as chlorine gas. Finally, the process uses lower intensity process conditions than at least some conventional processes, and thus, operating costs are saved.

The invention belongs to the technical field of medicine, and particularly relates to a preparation method of a protein kinase inhibitor fasudil hydrochloride. According to the method, as 5-isoquinoline sulfuryl chloride hydrochloride is adopted to react with homopiperzine directly, the problem that 5-5-isoquinoline sulfuryl chloride is easy to hydrolyze is avoided; and as fasudil hydrochloride is obtained by a direct water phase evaporating method, the problem that the extraction filtration of fasudil hydrochloride is difficult is solved. The preparation method is simple to operate, and higher in product yield and product purity.

An apparatus and method for fabricating continuous cathode collecters for use in lithium/thionyl chloride and lithium/sulfuryl chloride cells is described. The preferred electrically conductive material is acetylene black mixed with a polytetrafluroethylene (PTFE) binder in a dry, powderized form. The collector substrate is a nickel or stainless steel foil that has been expanded into a mesh or otherwise provided with perforations. A centering adjustment of the collector substrate controls loading of the electrically conductive mixture onto each side thereof. The dry, powdered electrically conductive mixture is then continuosly fed into the calender and formed into a collector structure by locking to itself through the collector substrate perforations before being cut to size.

The invention relates to a method for continuously synthesizing trifluoroacetyl chloride and sulfuryl fluoride, which comprises the following process: continuously introducing sulfur trioxide and trifluorotrichloroethane (F113a) into a reaction rectifying tower containing a catalyst and a filler thorough the lower part in the tower according to a mol ratio of 1:1, wherein the temperature of the tower is controlled to range between 120 DEG C and 130 DEG C, and the reflux ratio at the top of the tower is 2.5-3; introducing tower bottoms into a sulfuryl chloride separating tower for rectification and separation, wherein the tower temperature is 145-150 DEG C, and the reflux ratio is 0.5-1.0; returning pyrosulfuryl chloride in the separating tower to the middle upper part of the reaction rectifying tower, heating the sulfuryl chloride rectified off from the top of the tower to 150 DEG C, and then introducing the rectified sulfuryl chloride and preheated recycled and newly-added hydrogen fluoride gas into a reactor containing a palladium/charcoal catalyst, wherein the reaction temperature is controlled to range between 150 DEG C and 160 DEG C; separating out unreacted hydrogen fluoride from the reaction product through a cold trap, and returning to the reactor for further use; and then absorbing and separating hydrogen chloride through a falling film, drying, compressing, and condensing to obtain the sulfuryl fluoride. The invention has the advantage of easy acquisition of raw materials, and the sulfuryl chloride byproduct can be directly used for the synthesis of sulfuryl fluoride.

Provided is a process for the preparation of an N-substituted isothiazolinone derivative having the general formula (I), comprising reacting N-substituted 3-mercaptopropionamides of formula (II) or N,N′-bis-substituted 3,3′-dithiodipropionamides of formula (III) with sulfuryl chloride in the absence of solvents. Also provided is a process for the preparation of a compound having the general formula (III), comprising reacting a methyl ester of formula (IV) with an amine of formula (V) in a solvent of methanol. As no addition solvent is used in the process of the invention, the cost of manufacturing and pollution to the environment can be reduced.

The invention discloses a preparation method of parachlorometaxylenol. The method includes: adding a proper amount of tetrachloroethylene or dichloroethane into acidic water to prepare a composite solvent, i.e. an M system, letting a chlorinating agent sulfuryl chloride and a substrate 3, 5-dimethylphenol undergo a chlorination reaction in the M system so as to produce the target product parachlorometaxylenol. The method not only can avoid use of catalysts that are expensive and are difficult to recover, but also can reduce the use of organic solvents, and reduce energy consumption during production. At the same time, the method can improve the conversion per pass of the product and the first-time qualification rate. Moreover, the process also can significantly reduce the exhaust gas and waste in the production process, such as volatilization of organic solvents, discharge of inactivated metal catalysts, and can improve the production environment, thus being conducive to environmental protection.

A process for preparing 2-(4'methylbenzosulfonyl) ethyl propionate includes such steps as adding toluene, P-toluene sulfuryl chloride and sodium hydroxide or potassium carbonate or CaO into reactor, dripping ethyl L-lactate at a temp lower than 10 deg.C, reaction, adding water, stirring, regulating pH=6-7, removing lower-layer water, and negative-pressure distilling to remove toluene and obtain product.

The invention relates to a method for preparing 2-chlorine-5 chloromethyl thiazole. The method comprises the following steps of: preparing 2-chlorine-5 chloromethyl thiazole by taking 2,3-dichloropropene, sodium sulfocyanate, sulfuryl chloride sulfuryl chloride and the like as main raw materials and changing a reaction solvent, reaction temperature and the like; purifying the product. An experimental result indicates that the method in which 2-chlorine-5 chloromethyl thiazole with the purity of 99% is prepared from 2,3-dichloropropene and sodium sulfocyanate through a one-pot process sequentially including substitution reaction, isomerization reaction and chlorination-cyclization reaction by taking methylbenzene as a solvent has the advantages of simple operation, few side reactions and high efficiency.