Novel approach to biscarbazole alkaloids via Ullmann coupling – synthesis of murrastifoline-A and bismurrayafoline-A
作者:Carsten Börger、Olga Kataeva、Hans-Joachim Knölker
DOI:10.1039/c2ob26229k
日期:——
Unprecedented Ullmann couplings of murrayafoline-A with either 6-bromo- or 4-bromocarbazole derivatives provide highly efficient synthetic routes to the biscarbazole alkaloids murrastifoline-A (6 steps, 66% overall yield) and bismurrayafoline-A (6 steps, 28% overall yield).
将 murrayafoline-A 与 6-bromo- 或 4-bromocarbazole 衍生物进行史无前例的 Ullmann 偶联,可高效合成双咔唑生物碱 murrastifoline-A(6 个步骤,总收率 66%)和 bismurrayafoline-A(6 个步骤,总收率 28%)。