Total synthesis of (±) aspidostomide B, C, regioisomeric N-methyl aspidostomide D and their derivatives
作者:Mulla Althafh Hussain、Faiz Ahmed Khan
DOI:10.1016/j.tetlet.2019.151040
日期:2019.9
A full account of the total synthesis of aspidostomide B, C, their analogues and our synthetic efforts towards the synthesis of aspidostomide D, which led to the synthesis of regioisomeric N-methyl aspidostomide D, its analogues via epoxide opening strategy is presented. The synthesis of regioisomeric N-methyl aspidostomide D involves an efficient, five-step sequence, with 36.3% overall yield, starting
全面介绍了杀虫威B,C,其类似物的总合成以及我们为合成杀虫威D而进行的合成努力,该合成导致了通过环氧化物开放策略合成区域异构体N-甲基杀虫威D。从3,4,5-三溴-1H-吡咯-2-羧酸开始,区域异构体N-甲基蛇毒苷D的合成涉及有效的五步序列,总收率达36.3%。该方案的关键特征是分子内环化,脱水,氧化和路易斯酸介导的区域选择性环氧化物环的2,5-二溴-1H-吲哚的C-3位置开环,以提供标题化合物。