SCHEDULED MAINTENANCE
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%.
S. Cadamuro, I. Degani, R. Fochi, A. Gatti and L. Piscopo, J. Chem. Soc., Perkin Trans. 1, 1996, 2365 DOI: 10.1039/P19960002365
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