A Hg(ClO4)2·3H2O Catalyzed Sakurai–Hosomi Allylation of Isatins and Isatin Ketoimines Using Allyltrimethylsilane
摘要:
It is reported that Hg(ClO4)(2)center dot 3H(2)O could efficiently activate the cheap but less reactive allyltrimethylsilane for the allylation of isatins or isatin ketoimines, with catalyst loading down to 0.1 mol %. This is the first example of Sakurai-Hosomi allylation of ketoimines using allyltrimethylsilane. A rare example of chiral mercury catalysis is also reported.
Total Synthesis of (+)-Perophoramidine and Determination of the Absolute Configuration
作者:Haoxing Wu、Fei Xue、Xue Xiao、Yong Qin
DOI:10.1021/ja1070043
日期:2010.10.13
migration of the amidine moiety in 37, which guarantees a regioselective methylation on N(1) at the end of the synthesis. The absolute configuration of (+)-perophoramidine was determined by X-ray crystallographic analysis of the chiral intermediate 32 and comparison of the rotation of synthetic (+)-perophoramidine with that of the natural product.
A Hg(ClO<sub>4</sub>)<sub>2</sub>·3H<sub>2</sub>O Catalyzed Sakurai–Hosomi Allylation of Isatins and Isatin Ketoimines Using Allyltrimethylsilane
作者:Zhong-Yan Cao、Yan Zhang、Cong-Bin Ji、Jian Zhou
DOI:10.1021/ol202705g
日期:2011.12.16
It is reported that Hg(ClO4)(2)center dot 3H(2)O could efficiently activate the cheap but less reactive allyltrimethylsilane for the allylation of isatins or isatin ketoimines, with catalyst loading down to 0.1 mol %. This is the first example of Sakurai-Hosomi allylation of ketoimines using allyltrimethylsilane. A rare example of chiral mercury catalysis is also reported.