Total Synthesis of Carbazomycin G by a Thermal Ring Expansion/Self-Redox Reaction Cascade
作者:Yong An、Yunxia Wang、Xiangdong Hu
DOI:10.1002/ejoc.201402065
日期:2014.6
interesting thermal ring expansion/self-redox reaction cascade of intermediate 11 has been developed in our study. The self-redox reaction of intermediate 10 can be readily accelerated in the presence of triethylamine, and a plausible reaction mechanism for this process has been proposed. Finally, the synthesis of carbazomycin G was completed by the widely applied regioselective methylation reaction.
卡马霉素 G (7) 的全合成已从市售材料开始,分六个步骤完成,总产率为 26%。作为获得卡巴霉素 A-H 三环骨架的有效途径,我们的研究开发了一种有趣的中间体 11 的热环膨胀/自氧化还原反应级联。在三乙胺的存在下,中间体 10 的自氧化还原反应可以很容易地加速,并且已经提出了该过程的合理反应机制。最后,通过广泛应用的区域选择性甲基化反应完成了卡马霉素G的合成。