CYCLOADDITION REACTIONS OF ARYL 2-FURYL THIONES AND ARYL 2-THIENYL THIONES WITH MALEIC ANHYDRIDE AND 2-NORBORNENE
作者:Haruo Ohmura、Shinichi Motoki
DOI:10.1246/cl.1981.235
日期:1981.2.5
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 1,4-cycloadducts. In these reactions, one of the double bond in the furan or thiophene ring and the thiocarbonyl group reacted as a hetero