作者:C. Chapuis、B. Winter、K.H. Schulte-Elte
DOI:10.1016/s0040-4039(00)60025-4
日期:1992.10
(+)-1a–d were decarbonylated with a catalytic amount of Rh/Al2O3 with only slight racemization. Experiment with other catalysts showed that racemization increases with the ability of the metal to form a π-allyl complex and to catalyse the hydrogenation of the β-elimination side product. (Ph3P)3RhCl gave the best results.
用催化量的Rh / Al 2 O 3进行去羰基化的喜树碱类似物(+)- 1a–d,仅出现少量外消旋作用。用其他催化剂进行的实验表明,外消旋作用随金属形成π-烯丙基络合物和催化β-消除副产物氢化的能力而增加。(Ph 3 P)3 RhCl效果最佳。