PROCÉDÉ DE SYNTHÈSE DE 5,6-BIS(5-ALCOXYTHIOPHÈN-2-YL)PYRAZINE-2,3-DICARBONITRILES, DÉRIVÉS DE DICYANOPYRAZINE ET UTILISATION ASSOCIÉE

摘要

The present invention relates to a method of synthesis of compounds of general formula (I) wherein R is linear or branched (C1-C8) alkyl, (C5-C6) cycloalkyl or benzyl, the method comprising the following steps: 10 step a) Friedel-Crafts reaction of thiophene derivative oxalyldichloride, followed by step b) Lewis acid catalyzed condensation reaction. The present invention further relates to dicyanopyrazine derivatives, and to the use thereof in catalysis of photoredox reactions.