Iridapyrrole Complexes via Formal 3 + 2 Cycloaddition of Iridium Alkenyls to Acetonitrile

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• 作者：Ysaias Alvarado ; P. James Daff ; Pedro J. P&eacute ; rez ; Manuel L. Poveda ; Roberto Sá ; nchez-Delgado ; and Ernesto Carmona
• 刊名：Organometallics
• 出版年：1996
• 出版时间：April 30, 1996
• 年：1996
• 卷：15
• 期：9
• 页码：2192 - 2194
• 全文大小：171K
• 年卷期：v.15,no.9(April 30, 1996)
• ISSN：1520-6041

文摘

Under appropriate conditions, the bis(ethylene) derivative Tp*Ir(C₂H₄)₂(Tp* = hydrotris(3,5-dimethyl-1-pyrazolyl)borate) reacts with MeCN to providethe Ir(III) complexTp*Ir(CH=CH₂)(C₂H₅)(NCMe)(1). Inthe presence of catalytic amounts of water, 1undergoesintramolecular coupling of the vinyl and acetonitrileligands, with formation of a compound (2a) thatcontains a delocalized, five-membered iridapyrrole ring.This unusual cycloaddition reaction can be extendedtoother related alkenyl complexes of iridium.