Stereospecific cyclization of β-hydroxy aryl amides to β-lactams
作者:Ajay K. Bose、M. S. Manhas、D. P. Sahu、V. R. Hegde
DOI:10.1139/v84-428
日期:1984.11.1
N-Aryl-β-lactams can be prepared conveniently by an intramolecular reaction of β-hydroxyarylamides under the influence of diethylazodicarboxylate (DEAD) and triphenylphosphine (TPP). Optically active 3-amino-2-azetidinone derivatives can be prepared by this method starting with a suitably protected α-amino-β-hydroxy carboxylic acid amide. This cyclization involves the retention of configuration at