The reaction of chlorosulfonyl isocyanates with allenes and olefins
作者:Emil J. Moriconi、John F. Kelly
DOI:10.1021/jo01272a005
日期:1968.8
Au-Catalyzed Synthesis of 5,6-Dihydro-8<i>H</i>-indolizin-7-ones from <i>N</i>-(Pent-2-en-4-ynyl)-β-lactams
作者:Yu Peng、Meng Yu、Liming Zhang
DOI:10.1021/ol802159v
日期:2008.11.20
Au-catalyzed synthesis of 5,6-dihydro-8H-indolizin-7-ones from readily available N-(pent-2-en-4-ynyl)-beta-lactams is developed. In this reaction, a 5-exo-dig cyclization of the beta-lactam nitrogen to the Au-activated C-C triple bond is followed by heterolytic fragmentation of the amide bond, forming a highly nucleophilic acyl cation. An expedient formal synthesis of indolizidine 167B was easily achieved using this new method.