Wang的对映选择性硫脲催化的螺旋环化为放线菌Actinoalloteichus cyanogriseus的海洋天然产物氰化物的第一个四环类似物铺平了道路。所述合成包括从亚烷基吲哚酮开始的七个步骤。(E)-苯乙烯基侧链的安装面临区域化学问题,这是通过事先转化为乙内酰脲并采用巴蒂条件来避免的。螺二氢吲哚吡咯并[1,2- c ]咪唑和氰化物的ECD光谱比较证实了天然产物的绝对构型。
Wang的对映选择性硫脲催化的螺旋环化为放线菌Actinoalloteichus cyanogriseus的海洋天然产物氰化物的第一个四环类似物铺平了道路。所述合成包括从亚烷基吲哚酮开始的七个步骤。(E)-苯乙烯基侧链的安装面临区域化学问题,这是通过事先转化为乙内酰脲并采用巴蒂条件来避免的。螺二氢吲哚吡咯并[1,2- c ]咪唑和氰化物的ECD光谱比较证实了天然产物的绝对构型。
Enantioselective Michael/Cyclization Reaction Sequence: Scaffold-Inspired Synthesis of Spirooxindoles with Multiple Stereocenters
作者:Yiming Cao、Xianxing Jiang、Luping Liu、Fangfang Shen、Futing Zhang、Rui Wang
DOI:10.1002/anie.201104216
日期:2011.9.19
A‐spiro‐ing: The title reaction of α‐isothiocyanato imides and methyleneindolinones has been realized for the first time using 1 as the catalyst. This newly developed synthetic method provides a simple, efficient, and environmentally friendly way to access, in an enantioselective manner, densely functionalized spirooxindoles having three contiguous stereogenic centers.