Asymmetric synthesis of the tremulane skeleton by a tandem cyclopropanation/cope rearrangement
作者:Huw M.L. Davies、Brian D. Doan
DOI:10.1016/0040-4039(96)00723-x
日期:1996.6
A highly diastereoselective and enantioselective 3 + 4 annulation method for the synthesis of polycyclic systems was achieved in a two step sequence consisting of an asymmetric intramolecular cyclopropanation catalyzed by dirhodium(II) tetrakis((R)-N-(p-(dodecyl)phenylsulfonyl)prolinate) followed by a Cope rearrangement of the resulting divinylcyclopropane intermediate.
分两步实现了高度非对映选择性和对映选择性3 + 4环化方法,用于合成多环系统,该方法由不对称分子内环丙烷化反应制得,该不对称分子内环丙烷化反应是由四((R))吡啶鎓(II)-N-(对-(十二烷基)苯基磺酰基)脯氨酸盐),然后对所得的二乙烯基环丙烷中间体进行Cope重排。