FIELD: chemistry.
SUBSTANCE: invention relates to the chemistry of heterocyclic compounds, namely to esters of 3,4-dialkoxy-2,5-thiophene dicarboxylic acid (formula I and II). The method for obtaining esters of 3,4-dialkoxy-2,5-thiophene dicarboxylic acid (formulas I and II) consists in the interaction of diethyl ester of 3,4-dihydroxy-2,5-thiophene dicarboxylic acid with dialkyl carbonates in the presence of bromides or chlorides of quaternary ammonium bases in autoclave made of titanium, with stirring at 150-180°C for 10-48 hours.
EFFECT: creation of an environmentally safe and waste-free "green" method for obtaining esters of 3,4-dialkoxythiophene-2,5-dicarboxylic acids I and II with the possibility of organizing the recycling of unreacted substances.
1 cl, 5 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PRODUCING DIMETHYL ETHER OF 2,5-THIOPHENE DICARBOXYLIC ACID FROM THIOPHENE | 2008 |
|
RU2404176C2 |
| METHOD OF PRODUCING DIMETHYL ETHER OF 2,5-THIOPHENE DICARBOXYLIC ACID FROM 2-THIOPHENE CARBOXYLIC ACID | 2008 |
|
RU2402541C2 |
| METHOD OF PRODUCING O-ISOPROPYL-N-(3-CHLOROPHENYL)CARBAMATE | 2023 |
|
RU2819162C1 |
| DERIVATIVES OF [([2- (AMINO -3,4-DIOXO -1-CYCLOBUTENE -1-YL)AMINO]ALKYL)] ACIDS | 1992 |
|
RU2039035C1 |
| METHOD OF PRODUCING OPTICALLY ACTIVE KETALS | 0 |
|
SU1431678A3 |
| METHOD OF SYNTHESIS OF 5-HYDROXY-DERIVATIVES OF 2,3-DIHYDRO-4,6,7-TRIMETHYL-2-(RS)-BENZOFURANACETIC ACID | 1991 |
|
RU2035459C1 |
| METHOD OF OBTAINING ARYLALKANIC ACIDS | 0 |
|
SU1574167A3 |
| METHOD OF PRODUCING 4-FORMYL-6,7-DIHYDROXY-BENZO[B]THIOPHENE-3-CARBOXYLIC ACID ESTER | 2019 |
|
RU2722595C1 |
| METHOD OF PRODUCING METHYL ESTER OF 3,6-DIMETHYL-2,4-HYDROXYBENZOIC ACID | 0 |
|
SU1442518A1 |
| METHOD OF SYNTHESIS OF 3,7-DIALKYLXANTHINES | 1993 |
|
RU2114847C1 |
