Competitive intramolecular carbenoid reactions of pyrrole derivatives
作者:Charles W. Jefford、Alexander Zaslona
DOI:10.1016/s0040-4039(00)95118-9
日期:1985.1
Rhodium(II) acetate-catalyzed decomposition of 1-diazo-3-phenyl-4-(pyrrol-1-yl)-butan-2-one and its p-methoxy derivative resulted in their intramolecular cyclization to form the 6-phenyl-5,6-dihydroindolizin-7(8H)-ones and 1-(pyrrol-1-yl)methylindan-3-ones as major and minor products respectively in high yields (77–89%). The p-nitrophenyldiazo compound cyclized exclusively to the 5,6-dihydroindolizin-7(8H)-one
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).