Synthesis of Methylene-Bridged Biscarbazole Alkaloids by using an Ullmann-type Coupling: First Total Synthesis of Murrastifoline-C and Murrafoline-E
作者:Sebastian K. Kutz、Carsten Börger、Arndt W. Schmidt、Hans-Joachim Knölker
DOI:10.1002/chem.201504680
日期:2016.2.12
describe the total synthesis of methylene‐bridged biscarbazole alkaloids by using a late‐stage Ullmann‐type coupling of fully functionalised carbazole subunits. The carbazole derivatives were synthesised via a sequence of palladium(0)‐ and palladium(II)‐catalysed coupling reactions. Our approach has provided bismurrayafoline‐A, bismurrayafolinol, chrestifolines B–D, and the first total synthesis of murrastifoline‐C
我们通过使用功能齐全的咔唑亚基的后期Ullmann型偶联来描述亚甲基桥联双咔唑生物碱的总合成。咔唑衍生物是通过一系列钯(0)和钯(II)催化的偶联反应合成的。我们的方法已经提供了比色拉菲林-A,比色拉佛林酚,chrestifolines B-D,以及第一个总合成的murrastifoline-C和murrafoline-E。