NbCl3-Catalyzed Intermolecular [2+2+2] Cycloaddition of Alkynes and α,ω-Dienes: Highly Chemo- and Regioselective Formation of 5-ω-Alkenyl-1,4-substituted-1,3-cyclohexadiene Derivatives
摘要:
Intermolecular [2+2+2] cycloaddition of tert-butylacetylene with alpha,omega-dienes was successfully achieved by NbCl3(DME) catalyst to afford 5-omega-alkenyl-1,4-disubstituted-1,3-cyclohexadienes in excellent yields with high chemo- and regioselectivity.
NbCl<sub>3</sub>-Catalyzed Three-Component [2 + 2 + 2] Cycloaddition Reaction of Terminal Alkynes, Internal Alkynes, and Alkenes to 1,3,4,5-Tetrasubstituted 1,3-Cyclohexadienes
作者:Yasushi Satoh、Yasushi Obora
DOI:10.1021/ol200662e
日期:2011.5.20
Three-component [2 + 2 + 2] cycloaddition of terminal alkynes, internal alkynes, and terminal alkenes is achieved using an NbCl3(DME) catalyst, leading to 1,3,4,5-substituted 1,3-cyclohexadienes in excellent yields with high chemo- and regioselectivity.