ALKYLATION METHOD OF 3,4-DIHYDROXYTHIOPHENE-2,5- DICARBOXYLIC ACID ESTER

ALKYLATION METHOD OF 3,4-DIHYDROXYTHIOPHENE-2,5- DICARBOXYLIC ACID ESTER

PROBLEM TO BE SOLVED: To provide an alkylation method of 3,4-dihydroxythiophene-2,5- dicarboxylic acid ester or an alkali metal salt or an alkaline earth metal salt thereof, which is easy to carry out and with which corresponding 3,4- dialkoxythiophene-2,5-dicarboxylic acid ester and 3,4-alkylenedio...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: RAUCHSCHWALBE GUNTER, SCHENKEL RALFO, WINKLER ADOLF DR, BREMEN JOSEF DR, KLAUSENER ALEXANDER
Format: Patent
Sprache:eng
Schlagworte:
APPARATUS THEREFOR
CHEMISTRY
GENERAL METHODS OF ORGANIC CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To provide an alkylation method of 3,4-dihydroxythiophene-2,5- dicarboxylic acid ester or an alkali metal salt or an alkaline earth metal salt thereof, which is easy to carry out and with which corresponding 3,4- dialkoxythiophene-2,5-dicarboxylic acid ester and 3,4-alkylenedioxythiophene-2,5- dicarboxylic acid ester can be obtained in a high yield in a relatively short reaction period. SOLUTION: The alkylation method is characterized by that 3,4- dihydroxythiophene-2,5-dicarboxylic acid ester or an alkali metal salt or an alkaline earth metal salt thereof is alkylated in the presence of an organic onium salt.