Palladium-catalysed cascade ring expansion reaction of cyclobutanols that have a propargylic moiety with nucleophiles
作者:Masahiro Yoshida、Yuki Komatsuzaki、Hideo Nemoto、Masataka Ihara
DOI:10.1039/b410362a
日期:——
Cascade ring rearrangement of four-membered ring systems containing various propargylic components by a palladium catalyst is described. The reactions of cyclobutanols that have a propargylic carbonate moiety with phenols as nucleophiles produce phenoxy-induced cyclopentanones in high yields. The reactions proceed in a regio- and diastereoselective manner to afford the substituted cyclopentanones with
描述了通过钯催化剂对含有各种炔丙基组分的四元环系统的级联环重排。具有炔丙基碳酸酯部分的环丁醇与作为亲核试剂的酚的反应以高收率产生苯氧基诱导的环戊酮。反应以区域和非对映选择性的方式进行,以提供具有高选择性的取代的环戊烷。酰亚胺还充当亲核试剂,以产生酰亚胺基诱导的产物。炔丙基溴与醇钠成功反应,以高收率生产相应的产物。