ChemInform Abstract: Chemistry of Iminofurans. Part 5. Synthesis, Structure, and Cyclization of 4‐R‐4‐Oxo‐2‐[2‐(2‐oxo‐1,2‐diphenylethylidene)hydrazino]but‐2‐enoic Acids.

Abstract

hydrazino]but-2-enoic Acids. -The title compounds (III) exist in solution as Z-and E-enehydrazino-or β-ketohydrazone forms. On treatment with acetic anhydride, they undergo cyclization to furandiones (IV). -(KOMAROVA, O. A.; IGIDOV, N. M.; RUBTSOV*, A. E.; ZALESOV, V. V.; MAKAROV, A. S.; TOKSAROVA, Y. S.; Russ.