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CYCLOADDITION REACTIONS OF ARYL 2-FURYL THIONES AND 2-THIENYL THIONES WITH MALEIC ANHYDRIDE AND 2-NORBORNENE
Ohmura, Haruo,Motoki, Shinichi
, p. 235 - 238 (2007/10/02)
The reactions of aryl 2-furyl thiones with maleic anhydride and 2-norbornene gave 1,4-cycloadducts.The reactions of aryl 2-thienyl thiones with maleic anhydride gave aromatized and oxidized 1,4-cycloadducts, while the reaction with 2-norbornene gave only normal cycloadducts.In these reactions, one of the double bond in the furan or thiophene ring and the thiocarbonyl group reacted as a hetero diene system.
