The application of vinylogous iminium salt derivatives to an efficient relay synthesis of the pyrrole containing alkaloids polycitone A and B
作者:John T. Gupton、Robert B. Miller、Keith E. Krumpe、Stuart C. Clough、Edith J. Banner、Rene P.F. Kanters、Karen X. Du、Kartik M. Keertikar、Nicholas E. Lauerman、John M. Solano、Bret R. Adams、Daniel W. Callahan、Barrett A. Little、Austin B. Scharf、James A. Sikorski
DOI:10.1016/j.tet.2004.12.015
日期:2005.2
A new and efficient relay synthesis of the marine natural products polycitone A and B is described. The new strategy relies on the formation of 2,4-disubstitutedpyrroles from a vinamidinium salt followed by electrophilic substitution at the 5-position of the pyrrole and Suzuki coupling at the 4-position to produce the tetrasubstituted heterocycle efficiently and with complete control of regiochemistry
The application of vinylogous iminium salt derivatives to an efficient synthesis of the pyrrole containing alkaloids Rigidin and Rigidin E
作者:John T. Gupton、Edith J. Banner、Austin B. Scharf、Bradley K. Norwood、Rene P.F. Kanters、Raymond N. Dominey、Jonathan E. Hempel、Anastasia Kharlamova、Itta Bluhn-Chertudi、Charles R. Hickenboth、Barrett A. Little、Melissa D. Sartin、Matthew B. Coppock、Keith E. Krumpe、Bruce S. Burnham、Herman Holt、Karen X. Du、Kartik M. Keertikar、Anthony Diebes、Shahnaz Ghassemi、James A. Sikorski
DOI:10.1016/j.tet.2006.06.047
日期:2006.8
Studies directed on the synthesis of the pyrrole containing marine natural products Rigidin and Rigidin E via vinylogous iminium salts are described. The successful strategy relies on the formation of a 2,4-disubstituted pyrrolefrom a vinamidinium salt followed by acylation at the 5-position of pyrrole. Halogenation and aminocarbonylation at the 3-position of pyrrole followed by hydrolysis of the ester