title: A new product of rearrangement of penicillin V (S)-sulphoxide.
abstract: Penicillin V (S)-sulphoxide (I), treated with methanesulphonic acid in benzene and dimethylacetamide, gives the decarboxylated increment3-cephem compound (IV) and a new product of rearrangement to which the structure of the 4-[N-(1'-carboxy-2'-methylenepropyl)carbamoyl]-2-phenoxymethylthiazole (VIII) is ascribed.
mesh_terms: D009682:Magnetic Resonance Spectroscopy; D010404:Penicillin V / Q000031:analogs & derivatives* / Q000138:chemical synthesis; D013056:Spectrophotometry, Ultraviolet; D013454:Sulfoxides / Q000138:chemical synthesis
chemical_list: D013454:Sulfoxides; D010404:Penicillin V