Active Low-Valent Niobium Catalysts from NbCl5 and Hydrosilanes for Selective Intermolecular Cycloadditions
摘要:
An active niobium catalyst was developed via a simple and nontoxic reduction method from NbCl5/hydrosilane and utilized for the selective [2 + 2 + 2] cycloaddition reaction of terminal alkynes and alkenes/alpha,omega-dienes, to give 1,3-cyclohexadiene derivatives in high yields with excellent chemo- and regioselectivity.
NbCl<sub>3</sub>-catalyzed [2+2+2] intermolecular cycloaddition of alkynes and alkenes to 1,3-cyclohexadiene derivatives
作者:Yasushi Obora、Keisuke Takeshita、Yasutaka Ishii
DOI:10.1039/b820352k
日期:——
NbCl3(DME)-catalyzed [2+2+2] intermolecular cycloaddition of alkynes and alkenes was successfully achieved to give 1,4,5-trisubstituted-1,3-cyclohexadiene derivatives in good yields.
Active Low-Valent Niobium Catalysts from NbCl<sub>5</sub> and Hydrosilanes for Selective Intermolecular Cycloadditions
作者:Yasushi Satoh、Yasushi Obora
DOI:10.1021/jo201757w
日期:2011.10.21
An active niobium catalyst was developed via a simple and nontoxic reduction method from NbCl5/hydrosilane and utilized for the selective [2 + 2 + 2] cycloaddition reaction of terminal alkynes and alkenes/alpha,omega-dienes, to give 1,3-cyclohexadiene derivatives in high yields with excellent chemo- and regioselectivity.