作者:Felix Nissen、Heiner Detert
DOI:10.1002/ejoc.201100131
日期:2011.5
The total synthesis of the bacterial-derived, pentacyclic, antitumor antibiotic lavendamycin has been achieved through a highly convergent strategy. The key step of this synthesis is a ruthenium-catalyzed [2+2+2] cycloaddition of an electron-deficient nitrile to an alkynyl-ynamide to prepare the carboline scaffold. The elaborate cycloaddition substrate is obtained in few steps by an N-ethynylation
细菌衍生的五环抗肿瘤抗生素拉文霉素的全合成是通过高度收敛的策略实现的。该合成的关键步骤是钌催化的缺电子腈与炔基炔酰胺的 [2+2+2] 环加成反应,以制备咔啉支架。通过使用炔基碘鎓盐化学和两个钯催化的交叉偶联反应的 N-乙炔化,可以在几个步骤中获得精细的环加成底物。介绍了一种以氢醌为原料有效合成卤化喹啉-5,8-二酮结构单元的方法。