Stereochemical observations on the Wittig reaction of oxido phosphonium ylides with aldehydes
作者:Bruce E. Maryanoff、Allen B. Reitz、Barbara A. Duhl-Emswiler
DOI:10.1016/s0040-4039(00)81959-0
日期:1983.1
The reaction of aldehydes with oxido ylides shows a dramatic dependence of alkene stereochemistry on the distance between oxygen and phosphorus atomsl; ylides with proximal 0 and P atoms favor production of alkenes. The high stereoselectivity with γ-oxido ylides is not mainly attributable to intramolecular proton-exchange in a Wittig intermediate.
醛与氧化物的反应表明,烯烃立体化学对氧原子与磷原子之间的距离有显着的依赖性。具有近端0和P原子的芳基有利于烯烃的生产。γ-氧化酰基的高立体选择性主要不是归因于Wittig中间体中的分子内质子交换。