title: Studies on lactams. XXII. An unusual reaction of some 6-azidopenams.
mesh_terms: D000577:Amides; D001386:Azides / Q000138:chemical synthesis*; D055598:Chemical Phenomena; D002621:Chemistry; D007769:Lactams / Q000138:chemical synthesis; D010406:Penicillins / Q000138:chemical synthesis*; D013844:Thiazoles
chemical_list: D000577:Amides; D001386:Azides; D007769:Lactams; D010406:Penicillins; D013844:Thiazoles