Phosphine-Catalyzed Difunctionalization of β-Fluoroalkyl α,β-Enones: A Direct Approach to β-Amino α-Diazo Carbonyl Compounds
作者:Huamin Wang、Li Zhang、Youshao Tu、Ruiqi Xiang、Yin-Long Guo、Junliang Zhang
DOI:10.1002/anie.201810253
日期:2018.11.26
practical phosphine‐catalyzed vicinal difunctionalization of β‐fluoroalkyl α,β‐enones with TMSN3 has been developed. Using dppb as the catalyst, the reaction worked efficiently to yield various β‐amino α‐diazocarbonyl compounds in high yields (up to 94 %). This work marks the first efficient construction of α‐diazocarbonyl compounds by phosphine catalysis. Meanwhile, the asymmetric variant induced by the
已经开发出了一种有效且实用的用TMSN 3的膦催化的β-氟烷基α,β-烯酮邻位双官能团。使用dppb作为催化剂,该反应有效地进行,以高收率(高达94%)产生了各种β-氨基α-重氮羰基化合物。这项工作标志着通过膦催化首次有效地构建了α-重氮羰基化合物。同时,亲核性双功能膦P4诱导的不对称变异导致高收率和对映选择性的各种手性氟代烷基化的β-氨基α-重氮羰基化合物。NMR和ESI-MS研究支持关键反应中间体的存在。相反,从β-氟代烷基化的β,β-二取代的烯酮可提供高产率的β-叠氮化物羰基化合物。