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 pyrrole from 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
描述了关于经由乙烯基亚胺盐合成含有海洋天然产物Rigidin和Rigidin E的吡咯的研究。成功的策略依赖于从钒胺盐形成2,4-二取代的吡咯,然后在吡咯的5位进行酰化。吡咯3位的卤代和氨基羰基化,然后C-2处的酯基水解,然后Curtius重排生成吡咯并嘧啶骨架。最后的脱保护步骤完成了Rigidin和Rigidin E的合成。