1-Acetoxy and 1-Silyloxy-1,3-dienes via Reductive Homologation of α, β,-Unsaturated Esters
作者:Conrad J Kowalski、G.Sankar Lal
DOI:10.1016/s0040-4039(00)95441-8
日期:1987.1
α, β-Unsaturated esters (1) are stereospecifically converted in a one-pot preparation into 1-oxygenated-,-dienes (4). This reductive homologation proceeds via lithium hydride reduction of the ene ynolate anion (2) to the dienolate anion 3, affording 1-acetoxy- or 1-silyloxy-1,3-dienes in yields of about 45–55%.
将α,β-不饱和酯(1)在一锅法制备中立体定向转化为1-氧合- ,-二烯(4)。这种还原性同系物通过氢化锂将烯y酸根阴离子(2)还原为二烯酸根阴离子3进行,得到1-乙酰氧基-或1-甲硅烷氧基-1,3-二烯,收率约为45-55%。