Synthesis of Phosphonobenzocarbacephems by Intramolecular Radical Cyclization of Haloaryl-Substituted β-Lactams
作者:Sarah Van der Jeught、Kurt G. R. Masschelein、Christian V. Stevens
DOI:10.1002/ejoc.200901351
日期:2010.3
A series of benzo-fused tricyclic β-lactams, most of them phosphonobenzocarbacephems, were prepared in a straightforward way starting from phosphonoazadienes. In this paper, the synthetic route including a Staudinger reaction towards the β-lactams, followed by radical ring closing with tributyltin hydride and AIBN, which resulted in the envisaged tricyclic compounds, is reported.
以膦酰基氮杂二烯为原料,以一种直接的方式制备了一系列苯并稠合三环 β-内酰胺类化合物,其中大部分是膦酰基苯并碳头烯。在本文中,报道了合成路线,包括对 β-内酰胺进行施陶丁格反应,然后用三丁基氢化锡和 AIBN 进行自由基闭环,从而产生设想的三环化合物。