Novel cyclodehydration reaction of hydroxyphenols. An alternative to the Mitsunobu reaction
作者:Panayiotis A. Procopiou、Alastair C. Brodie、Martyn J. Deal、David F. Hayman、Gary M. Smith
DOI:10.1039/p19960002249
日期:——
A mild, efficient and stereospecific intramolecular process for converting hydroxyphenols into benzodioxanes, dihydrobenzopyrans and dihydrobenzofurans via imidate esters is described. The only by-products are N,N-dimethylformamide and triethylamine hydrochloride which are removed by aqueous work-up making this process highly amenable to large scale operation.
描述了一种温和、高效且具有立体特异性的分子内反应过程,能够通过咪唑酯将羟基酚转化为苯并二恶烷、二氢苯并吡喃和二氢苯并呋喃。唯一的副产物是N,N-二甲基甲酰胺和氯化三乙胺,通过水相处理去除,使得该过程非常适合大规模操作。