Chemistry of Heterocyclic Compounds p. 862 - 865 (1989)
Update date:2022-09-26
Topics:
Koz'minykh, V. O.
Koz'minykh, E. N.
Andreichikov, Yu. S.
Reaction of 5-aryl-4-halo-2,3-dihydrofuran-2,3-diones with alkoxycarbonylmethylenetriphenylphosphoranes has given 2-alkoxycarbonylmethylene-5-aryl-4-halo-2,3-dihydrofuran-3-ones, which readily add halogens at the 2-exocyclic double bond, and on reaction with arylamines recyclize to give 2-hydroxy-2,3-dihydropyrrol-3-ones.
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