A new efficient catalytic system consisting of Cu(OAc)2, 2,4-lutidine, and ZnCl2 was found for the cyclopropanation of unsaturated compounds with methyl diazoacetate. In the case of conjugated dienes, the process occurs regioselectively at the most alkylated C=C bond.
发现了一种由 Cu(OAc)2、2,4-二
甲基吡啶和 ZnCl2 组成的新型高效催化体系,用于不饱和化合物与
重氮乙酸甲酯的
环丙烷化反应。对于共轭二烯,该过程区域选择性地发生在烷基化程度最高的 C=C 键处。