Use of vinylogous urethanes in alkaloid synthesis: formal synthesis of ipalbidine
作者:Arthur S. Howard、Graeme C. Gerrans、Joseph P. Michael
DOI:10.1021/jo01297a049
日期:1980.4
Intramolecular Carbenoid Reactions of Pyrrole Derivatives. A Total Synthesis of (±)-Ipalbidine
作者:Charles W. Jefford、Tadatoshi Kubota、Alexander Zaslona
DOI:10.1002/hlca.19860690828
日期:1986.12.10
rhodium(II)-acetate-catalyzed decomposition of 3-(4-acetoxyphenyl)-1-diazo-4-(pyrrol-1-yl)-2-butanone (5d) gave 6-(4-acetoxyphenyl)-5,6-dihydro-7(8H)-indolizinone (6d) in 82% yield via an intramolecular carbenoidreaction. The latter compound was converted in four steps in 13% overall yield to (±)-ipalbidine (1b).