Abstract: A preparation method of vegetable oil polyol, which is obtains by carrying out allylic oxidation treatment of vegetable oil, increasing the content of hydroxyl group in the product and then one step reaction between epoxidation and ring-opening. At the same time, the present invention also discloses novel vegetable oil polyol made by the preparation method and the application of the vegetable oil polyol in preparation of polyurethane foam material. Compared with the prior art, the method has the advantages of simple operation, low energy consumption and low side reaction occurrence rate.

Abstract: A preparation method of vegetable oil polyol, which is obtains by carrying out allylic oxidation treatment of vegetable oil, increasing the content of hydroxyl group in the product and then one step reaction between epoxidation and ring-opening. At the same time, the present invention also discloses novel vegetable oil polyol made by the preparation method and the application of the vegetable oil polyol in preparation of polyurethane foam material. Compared with the prior art, the method has the advantages of simple operation, low energy consumption and low side reaction occurrence rate.

Abstract: The present invention discloses a ?-polylysine hydrogel and the preparation method and application of the as-described ?-polylysine hydrogel. The polylysine hydrogel is non-toxic to a recipient, and has biodegradability and biocompatibility. The wound tissue healing material prepared by the present invention can be used in wound tissue adhesion in an efficient, stable, safe manner.

Abstract: Provided in the present invention is a preparation method for a phosphonic salt, comprising the step of: reacting 3,7,11-trimethyldodec-1,4,6,10-tetraene-3-ol with triarylphosphine and an acid in an alcohol solvent at 50-100° C. to form the phosphonic salt, wherein the acid is a sulfamic acid or methanesulfonic acid, and the alcohol solvent is a straight chain monohydric alcohol containing 1-5 carbon atoms. The method is performed in nearly neutral conditions, greatly reducing the generation of impurities and greatly obtaining phosphonic salt with an increased E content. The yield of lycopene obtained by using the phosphonic salt as a raw material is high.

Abstract: A method for preparing caprolactam by using a microreactor under Lewis acid catalysis, wherein a hydroxyl group in a cyclohexanone oxime is activated to obtain a cyclohexanone oxime sulfonates intermediate, then rearranged under Lewis acid catalysis to prepare the caprolactam. The method of this invention has a simple process and a high operation safety and selectivity, the reaction condition is mild, an efficient reaction can take place even at room temperature, the reaction time is short, the conversion of the cyclohexanone oxime can reach 100% within a short time, the selectivity of the caprolactam can reach 99%, the energy consumption is greatly reduced in the premise of maintaining a high yield, and the production cost is reduced, being an efficient and green and environmentally friendly method of for synthesizing the caprolactam.

Abstract: A method for preparing a high-quality epoxidized fatty acid ester with a micro-reaction device, including: respectively pumping an aqueous hydrogen peroxide solution and a carboxylic acid at the same time into a first micro-mixer; after the reaction in the first micro-reactor, respectively pumping the output material and an unsaturated fatty acid ester into a second micro-mixer; completely mixing them and then introducing the mixture into a second micro-reactor; and after a complete reaction, water-rinsing the organic phase part of the resultant reaction liquid and drying the same to obtain the epoxidized fatty acid ester.

Abstract: A method for preparing caprolactam by using a microreactor under Lewis acid catalysis, wherein a hydroxyl group in a cyclohexanone oxime is activated to obtain a cyclohexanone oxime sulfonates intermediate, then rearranged under Lewis acid catalysis to prepare the caprolactam. The method of this invention has a simple process and a high operation safety and selectivity, the reaction condition is mild, an efficient reaction can take place even at room temperature, the reaction time is short, the conversion of the cyclohexanone oxime can reach 100% within a short time, the selectivity of the caprolactam can reach 99%, the energy consumption is greatly reduced in the premise of maintaining a high yield, and the production cost is reduced, being an efficient and green and environmentally friendly method of for synthesizing the caprolactam.

Abstract: The present invention discloses a ?-polylysine hydrogel and the preparation method and application of the as-described ?-polylysine hydrogel. The polylysine hydrogel is non-toxic to a recipient, and has biodegradability and biocompatibility. The wound tissue healing material prepared by the present invention can be used in wound tissue adhesion in an efficient, stable, safe manner.

Abstract: A method for preparing a high-quality epoxidized fatty acid ester with a micro-reaction device, including: respectively pumping an aqueous hydrogen peroxide solution and a carboxylic acid at the same time into a first micro-mixer; after the reaction in the first micro-reactor, respectively pumping the output material and an unsaturated fatty acid ester into a second micro-mixer; completely mixing them and then introducing the mixture into a second micro-reactor; and after a complete reaction, water-rinsing the organic phase part of the resultant reaction liquid and drying the same to obtain the epoxidized fatty acid ester.

Abstract: Provided in the present invention is a method for synthesizing 2,7-dimethyl-2,4,6-octatriene-1,8-dialdehyde.

Abstract: This disclosure provides methods of controlled polymerization of cyclic compounds catalyzed by carbene derivatives having a general formula as shown below, and to obtain a biodegradable polymeric material having a large molecular weight, a narrow dispersity, and no metallic impurity.

Abstract: This disclosure provides a method of making polylactic acid using carbon dioxide adducts of carbenes, wherein the adducts of carbenes have a structure represented by formula (I) as follows:

Abstract: Disclosed is a preparation method of the lycopene intermediate 3-methyl-4,4-dialkoxy-1-butaldehyde. The preparation method comprises the following steps: (1) reacting 2-methyl-3,3-dialkoxy-1-halopropane with magnesium powder in the solvent of anhydrous tetrahydrofuran at a temperature of 45˜65° C. to generate a mixture of Grignard reagents under the protection of an inert gas; and (2) adding N,N-disubstituted carboxamide to the mixture of Grignard reagents and reacting at a temperature of 10° C.˜35° C. to obtain 3-methyl-4,4-dialkoxy-1-butaldehyde. The process route of the present invention is simple and direct, the operation is easy, the conditions are mild and the yield is good, and thus the invention has commercial value.

Abstract: Provided are a fructosylated mangiferin, a preparation method therefor and a use thereof, wherein the fructosylated mangiferin has a structural formula represented by the following formula (I), the method for preparing the fructosylated mangiferin includes adding a substance with fructosylating enzymatic activity to a transformed liquid containing mangiferin for biotransformation reaction, so as to convert the mangiferin into the fructosylated mangiferin, wherein the transformed liquid contains the mangiferin and a glycosyl donor; as well as a use of the fructosylated mangiferin in preparation of a medicament for treatment of tumor-related diseases.

Abstract: Provided in the present invention is a method for synthesizing 2,7-dimethyl-2,4,6-octatriene-1,8-dialdehyde.

Abstract: Provided in the present invention is a preparation method for a phosphonic salt, comprising the step of: reacting 3,7,11-trimethyldodec-1,4,6,10-tetraene-3-ol with triarylphosphine and an acid in an alcohol solvent at 50-100° C. to form the phosphonic salt, wherein the acid is a sulfamic acid or methanesulfonic acid, and the alcohol solvent is a straight chain monohydric alcohol containing 1-5 carbon atoms. The method is performed in nearly neutral conditions, greatly reducing the generation of impurities and greatly obtaining phosphonic salt with an increased E content. The yield of lycopene obtained by using the phosphonic salt as a raw material is high.

Abstract: Disclosed is a preparation method of the lycopene intermediate 3-methyl-4,4-dialkoxy-1-butaldehyde. The preparation method comprises the following steps: (1) reacting 2-methyl-3,3-dialkoxy-1-halopropane with magnesium powder in the solvent of anhydrous tetrahydrofuran at a temperature of 45˜65° C. to generate a mixture of Grignard reagents under the protection of an inert gas; and (2) adding N,N-disubstituted carboxamide to the mixture of Grignard reagents and reacting at a temperature of 10° C.˜35° C. to obtain 3-methyl-4,4-dialkoxy-1-butaldehyde. The process route of the present invention is simple and direct, the operation is easy, the conditions are mild and the yield is good, and thus the invention has commercial value.

Abstract: Provided are a fructosylated mangiferin, a preparation method therefor and a use thereof, wherein the fructosylated mangiferin has a structural formula represented by the following formula (I), the method for preparing the fructosylated mangiferin includes adding a substance with fructosylating enzymatic activity to a transformed liquid containing mangiferin for biotransformation reaction, so as to convert the mangiferin into the fructosylated mangiferin, wherein the transformed liquid contains the mangiferin and a glycosyl donor; as well as a use of the fructosylated mangiferin in preparation of a medicament for treatment of tumor-related diseases.

Abstract: Fructosylated puerarin being converted from puerarin by a bioconversion method conducted in an aqueous phase or nonaqueous phase system, including monofructosyl-(2,6)-puerarin, bifructosyl-(2,6)-puerarin, trifructosyl-(2,6)-puerarin, tetrafructosyl-(2,6)-puerarin and pentafructosyl-(2,6)-puerarin. Tests have shown that the oligosaccharylated puerarin is effective to treat acute myocardial ischemia, and can markedly suppress in vitro the proliferation of human breast cancer cell strain MDA-MB-23 and human chronmyelogenors leukemia cell strain K562, and it has a low toxicity.

Abstract: Fructosylated puerarin being converted from puerarin by a bioconversion method conducted in an aqueous phase or nonaqueous phase system, including monofructosyl-(2,6)-puerarin, bifructosyl-(2,6)-puerarin, trifructosyl-(2,6)-puerarin, tetrafructosyl-(2,6)-puerarin and pentafructosyl-(2,6)-puerarin. Tests have shown that the oligosaccharylated puerarin is effective to treat acute myocardial ischemia, and can markedly suppress in vitro the proliferation of human breast cancer cell strain MDA-MB-23 and human chronmyelogenors leukemia cell strain K562, and it has a low toxicity.