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 pyrrolefrom 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