Cp<sub>2</sub>ZrCl<sub>2</sub>-Mediated Three-Component Coupling Reactions of CO<sub>2</sub>, Ethylene (or Alkynes), and Electrophiles Leading to Carboxylic Acid Derivatives
作者:Naoto Chatani、Kohei Yamashita
DOI:10.1055/s-2005-864807
日期:——
pressure of CO 2 . The treatment of Cp 2 ZrCl 2 with EtMgBr followed by exposure to CO 2 generates zirconacycle 1, which can react with various electrophiles to give a variety of carboxylic acid derivatives. Unsaturated zircona-cycles 2 can also generated from Cp 2 ZrCl 2 , EtMgBr, alkynes, and CO 2 . Complexes 2 react with electrophiles to give α,β-unsaturated acids stereoselectively.
锆环 1 和 2 可以简单地由 Cp 2 ZrCl 2 、EtMgBr 和大气压 CO 2 生成。用 EtMgBr 处理 Cp 2 ZrCl 2 然后暴露于 CO 2 生成锆石环 1,它可以与各种亲电子试剂反应生成各种羧酸衍生物。不饱和氧化锆循环 2 也可以从 Cp 2 ZrCl 2 、EtMgBr、炔烃和 CO 2 产生。配合物 2 与亲电试剂反应,立体选择性地生成 α,β-不饱和酸。