Phosphine-mediated cascade reaction of azides with MBH-acetates of acetylenic aldehydes to substituted pyrroles: a facile access to N-fused pyrrolo-heterocycles
作者:Chada Raji Reddy、Motatipally Damoder Reddy、Boinapally Srikanth
DOI:10.1039/c2ob25272d
日期:——
One-pot synthesis of substituted pyrroles by a cascade reaction of azides with Morita–Baylis–Hillman acetates of acetylenic aldehydes is described and the reaction is efficiently mediated by triphenyl phosphine at room temperature. Sodium azide is successfully used to provide N-unsubstituted pyrroles, while alkyl azides afforded the corresponding N-alkylated pyrroles through a sequence of allylic substitution/azide
描述了叠氮化物与炔属醛的森田-贝利斯-希尔曼乙酸盐的级联反应的一锅法合成取代的吡咯,该反应在室温下由三苯基膦有效地介导。叠氮化钠已成功用于提供N-未取代的吡咯,而烷基叠氮化物通过一系列烯丙基取代/叠氮化物还原/环异构化反应提供了相应的N-烷基化吡咯。所获得的产品为吲哚并吲哚,吡咯并异喹啉和8-氧代-5、6、7、8-四氢吲哚并嗪提供了新的入口。