The application of vinylogous iminium salt derivatives and microwave accelerated Vilsmeier–Haack reactions to efficient relay syntheses of the polycitone and storniamide natural products
作者:John T. Gupton、Edith J. Banner、Melissa D. Sartin、Matthew B. Coppock、Jonathan E. Hempel、Anastasia Kharlamova、Daniel C. Fisher、Ben C. Giglio、Kristin L. Smith、Matt J. Keough、Timothy M. Smith、Rene P.F. Kanters、Raymond N. Dominey、James A. Sikorski
DOI:10.1016/j.tet.2008.03.038
日期:2008.5
vinylogous iminium salts and microwave accelerated Vilsmeier-Haack formylations are described. The successful strategy relies on the formation of a 2,4-disubstituted pyrrole or a 2,3,4-trisubstituted pyrrole from a vinamidinium salt or vinamidinium salt derivative followed by formylation at the 5-position of the pyrrole. Subsequent transformations of the selectively formylated pyrroles lead to efficient
描述了通过乙烯基亚胺盐和微波加速 Vilsmeier-Haack 甲酰化合成聚氯乙烯和 storniamide 天然产物的研究。成功的策略依赖于从 vinamidinium 盐或 vinamidinium 盐衍生物形成 2,4-二取代的吡咯或 2,3,4-三取代的吡咯,然后在吡咯的 5-位进行甲酰化。选择性甲酰化吡咯的后续转化导致含有天然产物的相应吡咯的有效和区域控制的中继合成。