title: Convenient synthesis of triphenylphosphanylidene spiro[cyclopentane-1,3'-indolines] and spiro[cyclopent[3]ene-1,3'-indolines] via three-component reactions. [Corrected].
abstract: Three-component reactions of triphenylphosphine, but-2-ynedioate, and isatylidene malononitrile (ethyl cyanoacetate) in dimethoxyethane resulted in triphenylphosphanylidene spiro[cyclopentane-1,3'-indolines] in satisfactory yields. Furthermore, similar three-component reactions of triphenylphosphine, hex-2-en-4-ynedioate, and isatylidene malononitrile (ethyl cyanoacetate) afforded functionalized spiro[cyclopent[3]ene-1,3'-indolines] in good yields. [Corrected]
authors.affiliation: College of Chemistry & Chemical Engineering, Yangzhou University , Yangzhou 225002, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Han
authors.forename: Yin-Jian
authors.initials: YJ
authors.lastname: Sheng
authors.forename: Chao-Guo
authors.initials: CG
authors.lastname: Yan