Convenient route for the synthesis of 3-substituted and 3,4-disubstituted pyrrole-2,5-dicarbaldehydes
Abstract
3-Substituted and 3,4-disubstituted pyrrole-2,5-dicarbaldehydes have been obtained by hydrolysis with HgO–35% aq. HBF4–DMSO of the intermediates 4 and 5 prepared by electrophilic substitution reactions on 2,5-bis(1,3-benzodithiol-2-yl)pyrrole. The overall yields starting from pyrrole ranged from 41–88%.