Diels-Alder reactions of 1,5-dihydropyrano[3,4-b]pyrrol-5(1H)-ones, pyrrole-2,3-quinodimethane analogues; a new synthesis of indoles
作者:P.Mark Jackson、Christopher J. Moody
DOI:10.1016/s0040-4020(01)90360-6
日期:1992.9
The pyrano[3,4-b]pyrrol-5-(1H)-ones 7 are stable cyclic analogues of pyrrole-2,3-quinodimethane, and undergo Diels-Alder reaction with a range of acetylenes (dimethyl acetylenedicarboxylate, ethyl propiolate, ethyl trimethylsilylpropynoate, benzyne and the acetylene equivalent, phenyl vinyl sulfoxide), to give, after loss of carbon dioxide, indoles. The Diels-Alder reaction can be extended to the intramolecular
吡喃并[3,4- b ]吡咯-5-(1 H)-ones 7是吡咯-2,3-喹二甲烷的稳定环状类似物,并与一定范围的乙炔(乙炔二羧酸二甲酯,丙炔酸乙酯)进行狄尔斯-阿尔德反应,三甲基甲硅烷基丙酸乙酯,苯炔和乙炔当量,苯基乙烯基亚砜),在失去二氧化碳后得到吲哚。Diels-Alder反应可以扩展到分子内变体,得到环烷基-[ e ]-和[ g ]-吲哚。