CONVENIENT SYNTHESIS 1H, 13C NMR STUDY AND X-RAY CRYSTAL STRUCTURE DETERMINATION OF SOME NEW DISUBSTITUTED THIOPHENES

Abstract 2,5-, 3,4- and 2,3-Thienylenediacrylic (1, 4 and 7 respectively) were synthesized in one step reaction by catalytic vinylation of the corresponding dibromothiophenes in the presence of cyclohexylamine salt of acrylic acid. 2,4-Thienylenediacrylic acid 10 was prepared by catalytic vinylation of 3-(4-bromo-2-thienyl)acryilic acid.