Highly regioselective α-alkylation of γ-acetoxy-α, β-enoates by reduction–alkylation with lithium dibutylcuprate–alkyl halides: application to the synthesis of spirovetivanes
作者:Toshiro Ibuka、Takeshi Aoyagi、Fumio Yoneda
DOI:10.1039/c39850001452
日期:——
Reaction of γ-acetoxy-α, β-enoates with lithium dibutylcuprate followed by alkyl halides results in the predominant or exclusive formation of α-alkyl-β, γ-enoates in high yields under mild conditions; a synthetic route to (±)-α-vetispirene is also presented.
Lewis acid mediated reactions of organocopper reagents. Entrainment in the conjugate addition to .alpha.,.beta.-unsaturated ketones, esters, and acids via the RCu.cntdot.BF3 system