Alkenylphosphonates: unexpected products from reactions of methyl 2-[(diethoxyphosphoryl)methyl]benzoate under Horner–Wadsworth–Emmons conditions
作者:Lynton J. Baird、Cédric Colomban、Claire Turner、Paul H. Teesdale-Spittle、Joanne E. Harvey
DOI:10.1039/c1ob05506b
日期:——
Methyl 2-[(diethoxyphosphoryl)methyl]benzoate reacts with several aldehydes to produce an alkenylphosphonate as the major product, together with varying amounts of the expected HornerâWadsworthâEmmons product, a 1,2-disubstituted E-alkene. Use of a bulky aldehyde or the tert-butyl ester favours the normal HWE product.
2-[(diethoxyphosphoryl)methyl]benzoate 甲酯与几种醛发生反应,生成的主要产物是烯基膦酸酯,以及不同数量的预期 HornerâWadsworthâEmmons 产物--1,2-二取代 E-烯。使用笨重的醛或叔丁基酯有利于生成正常的 HWE 产物。