Synthesis of 3,5-Disubstituted Butenolides. A Short Preparation of<i>Volatile Streptomyces Lactones</i>
作者:T. Howard Black、Gary A. Brown、Douglas C. Smith、Sean M. Martinie
DOI:10.1080/00397919508011381
日期:1995.2
Abstract α-Chloro carboxylic acid dianions condense with propanal to form β-lactones which, upon treatment with magnesium bromide, form 3,5-disubstitutedbutenolides.
摘要 α-氯代羧酸二价阴离子与丙醛缩合形成 β-内酯,用溴化镁处理后形成 3,5-二取代丁烯内酯。
Regioselectivity of dimerisation of butenolides via captodative stabilised radicaloid intermediates
作者:Sharanjeet K. Bagal、Robert M. Adlington、Rohan A.B. Brown、Jack E. Baldwin
DOI:10.1016/j.tetlet.2005.04.125
日期:2005.7
The regioselective outcome observed during dimerisation of butenolides to dimeric structures via captodative stabilised radicaloids has been studied. The captodative stabilised radicaloids were generated by initial conversion of butenolides to chlorobutenolides via the corresponding hydroxybutenolides, followed by treatment with CoCl(PPh3)3.