Phosphine-Catalyzed Stereoselective Ring-Opening Addition of Cyclopropenones with Nucleophiles
作者:LuLu Yang、Xin He、Jiao Jiao、Yuhai Tang、Jing Li、Yang Li、Ruixia Gao、Yong Wu、Silong Xu
DOI:10.1021/acs.joc.3c00603
日期:2023.7.7
A phosphine-catalyzed ring-opening addition reaction of cyclopropenones with a variety of nucleophiles (NuH), including oxygen-, nitrogen-, sulfur-, and carbon-based ones, has been investigated, which produces potentially useful α,β-unsaturated carbonyl derivatives in high yields (up to 99%), high regioselectivity, and exclusive E-selectivity. The reaction proceeds in high efficiency under very mild
已经研究了环丙烯酮与各种亲核试剂 (NuH)(包括氧基、氮基、硫基和碳基试剂)的膦催化开环加成反应,该反应产生潜在有用的 α,β-不饱和羰基衍生物具有高产率(高达 99%)、高区域选择性和独特的E选择性。该反应在非常温和的条件下仅使用 1 mol% PPh 3即可高效进行在室温下作为催化剂。当使用氘代亲核试剂 (NuD) 时,该方法还适用于合成氘代烯烃。通过实验和DFT计算对该机制进行了研究,表明α-烯酮基磷叶立德是催化循环中的关键中间体,能够以立体选择性方式捕获亲核试剂。