A Sulfoxide Version of the Julia–Lythgoe Olefination: A New Method for the Synthesis of Olefins from Carbonyl Compounds and Sulfoxides with Carbon–Carbon Coupling
作者:Tsuyoshi Satoh、Noriko Hanaki、Noriko Yamada、Tohru Asano
DOI:10.1016/s0040-4020(00)00585-8
日期:2000.8
Reaction of β-mesyloxy (or acetoxy) sulfoxides, derived from alkyl (or arylmethyl) phenyl sulfoxides and carbonyl compounds in two steps, with alkylmetals (n-BuLi, t-BuLi, or EtMgBr) at low temperature gave olefins in good to excellent yields. When the β-hydroxy sulfoxides derived from arylaldehydes were treated with mesyl chloride in the presence of triethylamine, the sulfoxides directly gave E-olefins
衍生自烷基(或芳甲基)苯基亚砜和羰基化合物的β-甲氧基(或乙酰氧基)亚砜在两个步骤中与烷基金属(n- BuLi,t- BuLi或EtMgBr)在低温下反应,可制得优异至优异的烯烃产量。当在三乙胺存在下用甲磺酰氯处理衍生自芳基醛的β-羟基亚砜时,亚砜直接以良好的收率得到E-烯烃。这些反应提供了Julia-Lythgoe烯化反应的亚砜形式。发现还原性邻位消除是通过亚砜与金属的直接交换而发生的。研究了消除的立体化学,发现具有立体特异性。然而,发现立体特异性取决于底物。