作者:James J. Kirchner、Daniel V. Pratt、Paul B. Hopkins
DOI:10.1016/s0040-4039(00)80461-x
日期:1988.1
Preparatively useful reaction conditions for the anionic oxy-Claisen rearrangement of an α-allyloxy ketone (6) possessing acidic α - and α′-hydrogens are described. The reaction rate and efficiency are strongly influenced by both solvent and counterion. The product, 8, although formally the product of [3,3]-sigmatropic rearrangement of enolate 7, may in fact arise via a [2,3]-Wittig followed by one
描述了用于具有酸性α-和α'-氢的α-烯丙氧基酮(6)的阴离子氧基-克莱森重排的制备有用的反应条件。反应速度和效率受溶剂和抗衡离子的强烈影响。产物8,尽管形式上是烯醇盐7的[3,3]-σ重排的产物,但实际上可能是通过[2,3] -Wittig随后是一个或多个[1,2]-酰胆碱重排而产生的。