33 results about "3-Dehydroshikimic acid" patented technology

Novel enzymes and novel enzymatic pathways for the pyruvate-based synthesis of shikimate or at least one intermediate thereto or derivative thereof, nucleic acids encoding the enzymes, cells transformed therewith, and kits containing said enzymes, cells, or nucleic acid. A KDPGal aldolase is used to perform condensation of pyruvate with D-erythrose 4-phosphate to form 3-deoxy-D-arabino-heptulosonate-7-phosphate (DAHP); a 3-dehydroquinate synthase is used to convert the DAHP to 3-dehydroquinate (DHQ); DHQ dehydratase can then convert DHQ to the key shikimate intermediate, 3-dehydroshikimate.

A method for producing cis,trans- and trans,trans-isomers of muconate by providing cis,cis -muconate produced from a renewable carbon source through biocatalytic conversion; isomerizing cis,cis-muconate to cis,trans-muconate under reaction conditions in which substantially all of the cis,cis-muconate is isomerized to cis,trans -muconate; separating the cis,trans-muconate; and crystallizing the cis,trans-muconate. The cis,trans-isomer can be further isomerized to the trans,trans-isomer. In one example, the method includes culturing recombinant cells that express 3-dehydroshikimate dehydratase, protocatechuate decarboxylase and catechol 1,2-dioxygenase in a medium comprising the renewable carbon source and under conditions in which the renewable carbon source is converted to 3-dehydroshikimate by enzymes in the common pathway of aromatic amino acid biosynthesis of the cell, and the 3-dehydroshikimate is biocatalytically converted to cis,cis-muconate.

The invention discloses a method for preparing epicatechol gallate and protocatechuic acid ester compounds from a natural shikimic acid. The method comprises the following steps of: performing an esterification reaction of the shikimic acid serving as a raw material to obtain shikimic acid ester; obtaining 3-dehydro-shikimic acid ester under the action of 2-iodyl benzoic acid; and realizing aromatization under the action of a catalyst to obtain epicatechol gallate or protocatechuic acid ester compound. A renewable raw material serves as a starting material and a polyhydroxy substituted benzoic acid is formed by a brand new method, so the method has the advantages of simpleness in operation, mild reaction condition, high yield, capacity of realizing sustainable development and the like.

The invention discloses a preparation method of a 3-dehydroshikimic ester compound compound. The preparation method of the invention comprises the following steps of: carrying out an esterification reaction between shikimic acid and alcohol under the action of an acylation reagent to obtain a shikimic ester compound; and then, converting the shikimic ester compound into 3-dehydroshikimic ester compound under the action of an oxidant IBX. The invention uses a renewable non-crop biomass resource as a raw material and has the advantages of mild reaction condition, high yield, and the like, is simple to operate and easy for large-scale preparation.

The invention discloses an HPLC determination method for shikimic acid and 3-dehydrogenated shikimic acid in pomegranate peels. The method disclosed by the invention comprises the following steps: taking methanol-phosphoric acid water solution with the volume percent of 1% as a mobile phase and carrying out isocratic elution to simultaneously determine the content of shikimic acid and 3-dehydrogenated shikimic acid in the pomegranate peels, so as to pointedly detect shikimic acid and 3-dehydrogenated shikimic acid components in pomegranate fruits. The determination method disclosed by the invention is simple to operate, has short elution time, can detect comprehensively and has high detection efficiency, so that a theoretical foundation is laid for disclosing a metabolism mechanism of gallic acid in the pomegranate fruits.

The invention relates to a method for preparing aryl alkyl amine compounds with 3-dehydrogenation methyl shikimate, in particular to a method for preparing 3,4-dyhydroxy-5-alkyl amino methyl benzoate compounds. The method includes steps of enabling 3-dehydrogenation methyl shikimate and aryl primary amine compounds to give a condensation-dehydrogenation reaction by means of catalysis of acid catalyst under the normal pressure and mixing conditions so that a six-membered ring framework gives an aromatization reaction, and then obtaining the 3,4-dyhydroxy-5-alkyl amino methyl benzoate compounds after the reacted mixture is concentrated, extracted, dried, filtered and recrystallized. The reaction is carried out for two to six hours at the temperature ranging from 20 DEG C to 50 DEG C. The method utilizes 3-dehydrogenation shikimic acid compounds which are renewable resources as raw materials, thereby having the advantages of fine atom economy, simplicity in operation, mild condition, high yield, low cost, less pollution and the like and being capable of realizing sustainable development.

The invention discloses a preparation method of N-(5-methoxycarbonyl-2-hydroxyphenyl) amino acid ester compounds. The method comprises the steps of allowing reaction of N-arylation reagent and amino acid methyl ester in presence of organic solvent, catalyst and dehydrating agent; cooling product after reaction, filtering, concentrating, separating and / or recrystallizing to obtain N-(5-methoxycarbonyl-2-hydroxyphenyl) amino acid ester compounds. The N-arylation reagent is methyl 3-dehydroshikimate, ethyl 3-dehydroshikimate or propyl 3-dehydroshikimate; has abundant resources and low cost; and belongs to renewable non-grain biomass resource. The method has the advantages of mild reaction condition, no need of noble metal catalysis, simple operation, high yield and large-scale preparation. Benzene ring of the product N-(5-methoxycarbonyl-2-hydroxyphenyl) amino acid ester compounds contains a phenol hydroxyl group (2-site) and a carboxylic acid methyl ester (5-site), which provides a wide space for further derivatization.

Novel enzymes and novel enzymatic pathways for the pyruvate-based synthesis of shikimate or at least one intermediate thereto or derivative thereof, nucleic acids encoding the enzymes, cells transformed therewith, and kits containing said enzymes, cells, or nucleic acid. A KDPGal aldolase is used to perform condensation of pyruvate with D-erythrose 4-phosphate to form 3-deoxy-D-arabino-heptulosonate-7-phosphate (DAHP); a 3-dehydroquinate synthase is used to convert the DAHP to 3-dehydroquinate (DHQ); DHQ dehydratase can then convert DHQ to the key shikimate intermediate, 3-dehydroshikimate.

The invention discloses a microwave synthesis method for a diarylamine compound. The method comprises the following steps of: subjecting 3-methyl dehydroshikimic acid and a primary arylamine compound to a condensation reaction, an isomerization reaction and a dehydration reaction under the action of an organic solvent, a catalyst and microwaves to enable a hexatomic ring framework to be aromatized; and then, cooling a reaction liquid, pouring the reaction liquid into saturated brine, rapidly stirring the solution, separating out a solid, and carrying out suction filtration, drying and recrystallization to obtain a 3-amido-4-hydroxybenzoic acid methyl ester compound. The raw material 3-methyl dehydroshikimic acid adopted in the method is a non-aromatic compound and can be prepared from shikimic acid by using a simple and convenient method without depending on fossil resources; sustainable exploitation and utilization can be realized; in addition, the microwave synthesis method adopts a microwave method which is short in reaction time, simple and convenient in operation, convenient in after-treatment and high in yield; and the microwave synthesis method is clean in reaction, friendly to the environment and low in energy consumption.

The invention belongs to the technical field of chemical synthesis, and discloses a 2-alkylamino-3-cyanobenzofuran type compound and a preparation method thereof. The preparation method of the compound comprises the following steps: (1) dissolving 3-dehydroshikimic acid methyl ester and malononitrile into a solvent A, reacting under a microwave condition, and filtering after the reaction to obtain an intermediate; and (2) performing microwave or oil-bath heating reaction on the intermediate obtained in the step (1) and a bromo-substance in a solvent B under the catalysis of alkali, and separating and purifying a reaction product to obtain the 2-alkylamino-3-cyanobenzofuran type compound. The method for preparing the 2-alkylamino-3-cyanobenzofuran type compound by taking a non-aromatic compound as an initiator is a brand-new method provided by the invention, and has the advantages of simple and easily-available raw material, mild reaction condition, simple operation, short reaction time, high yield and low cost.