A Partial Synthesis of the Skeleton of Deoxypumiloside, a Putative Intermediate in Camptothecin Biosynthesis
作者:Olivier P. Thomas、Anne Zaparucha、Henri-Philippe Husson
DOI:10.1002/1099-0690(20021)2002:1<157::aid-ejoc157>3.0.co;2-s
日期:2002.1
for the synthesis of a camptothecin-like skeleton. After C-21 activation through allylic conjugation, regiospecific tertiary amine oxidation was achieved with mercury salts. Subsequent biomimetic oxidation of the indole nucleus then gave quinolone lactam 14. A two-step process finally afforded 4, a close analogue of deoxypumiloside (5), one of the putative intermediates in the biosynthesis of camptothecin
Ajmalicine (3) 被用作合成喜树碱样骨架的起始材料。通过烯丙基共轭活化 C-21 后,用汞盐实现了区域特异性叔胺氧化。随后对吲哚核进行仿生氧化得到喹诺酮内酰胺 14。两步法最终得到 4,脱氧蒲米糖苷 (5) 的近似类似物,是喜树碱生物合成中推定的中间体之一。