A new synthetic route to (±)-thienamycin via 4-exo trigonal cyclisation of carbamoyl cobalt intermediates
作者:Gerald Pattenden、Stephen J. Reynolds
DOI:10.1016/0040-4039(91)80870-c
日期:1991.1
A new synthesis of (±)-thienamycin (1), based on elaboration of the key intermediate (12) in one step by heating a solution of the carbamoylcobalt salophen (11) in toluene, is described.
Formation of β-lactams from tricarbonyliron lactone complexes
作者:Gary D. Annis、Elizabeth M. Hebblethwaite、Steven V. Ley
DOI:10.1039/c39800000297
日期:——
A number of tricarbonyliron lactam complexes were prepared from the corresponding lactonecomplexes by reaction with amines in the presence of ZnCl2 and on subsequent oxidation with CeIV gave β-lactams in excellent yield.