Highly stereoselective preparation of tri- and tetra-substituted olefins via β-tributylstannyl-α,β-unsaturated ketones
作者:Takeshi Takeda、Yuki Kabasawa、Tooru Fujiwara
DOI:10.1016/0040-4020(95)00016-2
日期:1995.2
palladium(0)-catalyzed reaction of β-tributylstannyl-α,β-unsaturated ketones 3 with benzyl or aryl halides in the presence of copper(I) iodide gave the tri- and tetra-substituted olefins 4 or 5 with high stereoselectivity, respectively. It was found that the yields of 5 were remarkably improved by the use of triethylamine as an additive. The starting materials 3 were easily prepared by the tin(IV) chloride-promoted