Stereoselective Synthesis of Highly Substituted Conjugated Dienes via Pd‐Catalyzed Carbonylation of 1,3‐Diynes
作者:Jiawang Liu、Ji Yang、Wolfgang Baumann、Ralf Jackstell、Matthias Beller
DOI:10.1002/anie.201903533
日期:2019.7.29
stereoselective synthesis of conjugated dienes was realized for the first time via Pd‐catalyzed alkoxycarbonylation of easily available 1,3‐diynes. Key to success is the utilization of the specific ligand 1,1′‐ferrocenediyl‐bis(tert‐butyl(pyridin‐2‐yl)phosphine) (L1), which allows this novel transformation to proceed at room temperature. A range of 1,2,3,4‐tetrasubstituted conjugated dienes are obtained in
共轭二烯的立体选择性合成是通过Pd催化的容易获得的1,3-二炔的烷氧基羰基化首次实现的。成功的关键是利用特定的配体1,1'-二茂铁基-双(叔丁基(吡啶-2-基)膦)(L1),该新颖的转化反应可在室温下进行。通过这种简单的方法,可以以高收率和选择性获得一系列1,2,3,4-四取代的共轭二烯。该协议的综合用途在构成天然产物rac-Cagayanin,rac-galbulin,rac-agastinol和大麻素G的几种重要中间体的简明合成中得到了展示。