Journal of Organic Chemistry p. 3051 - 3053 (1983)
Update date:2022-08-05
Topics:
Heindel, Ned D.
Conley, Richard A.
Minatelli, John A.
Boschelli, Diane Harris
Condensation of 5-substituted 4-thiolen-2-ones (1) with aromatic aldehydes (2) in anhydrous ethanolic HCl generates the 3-benzylidene derivatives 3.These can be rearranged in base (benzylidene-thiolactone rearrangement) to 2,5-disubstituted thiophene-3-carboxylic acids (4, 5, or 6).
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