title: Letter: A rearrangement of penicillin sulfoxides to 3-methylenecephams via sulfinyl intermediates.
mesh_terms: D002511:Cephalosporins / Q000138:chemical synthesis*; D055598:Chemical Phenomena; D002621:Chemistry; D003500:Cyclization; D010406:Penicillins; D013441:Sulfinic Acids; D013454:Sulfoxides
chemical_list: D002511:Cephalosporins; D010406:Penicillins; D013441:Sulfinic Acids; D013454:Sulfoxides