1-(4-Methoxypheny])azetidin-2-ones 5a–5g were acetoxylated by lead(IV) acetate to afford the corresponding compounds 6a, 6b, 6c' and 6d–6g. In the d series elimination products 9 and 10 were also formed. Ring homologue 7a afforded the hydrotylated derivative 8'a.
作者:Edward G. Corley、Sandor Karady、Newton L. Abramson、Dean Ellison、Leonard M. Weinstock
DOI:10.1016/s0040-4039(00)80334-2
日期:——
Novel synthesis of 3-pyrrole substituted ?-lactams via microwave-induced bismuth nitrate-catalyzed reaction
作者:Debasish Bandyopadhyay、Jessica Cruz、Bimal K. Banik
DOI:10.1016/j.tet.2012.06.009
日期:2012.12
Highly stereoselective synthesis of 3-pyrrole substituted β-lactams is accomplished. The first step involves the synthesis of 3-phthalimido substituted β-lactams following Staudinger cycloaddition reaction of acid chloride equivalent with imines. Synthesis of 3-amino β-lactams is achieved via the deprotection of phthalimido group with ethylenediamine. These 3-amino β-lactams are converted to a new