Convenient Synthesis of Triphenylphosphanylidene Spiro[cyclopentane-1,3′-indolines] and Spiro[cyclopent[2]ene-1,3′-indolines] via Three-Component Reactions
作者:Ying Han、Yin-Jian Sheng、Chao-Guo Yan
DOI:10.1021/ol5008394
日期:2014.5.16
Three-componentreactions of triphenylphosphine, but-2-ynedioate, and isatylidene malononitrile (ethyl cyanoacetate) in dimethoxyethane resulted in triphenylphosphanylidenespiro[cyclopentane-1,3′-indolines] in satisfactory yields. Furthermore, similar three-componentreactions of triphenylphosphine, hex-2-en-4-ynedioate, and isatylidene malononitrile (ethyl cyanoacetate) afforded functionalized s