MgBr<sub>2</sub>-PROMOTED ELECTROSYNTHESIS OF SULFENIMINES (THIOOXIMES) FROM α-AMINOALKANOATES AND DIARYL/DIALKYL DISULFIDES IN A CH<sub>2</sub>Cl<sub>2</sub>–H<sub>2</sub>O TWO-PHASE SYSTEM. A STRAIGHTFORWARD PREPARATION OF C(6)/C(7)-SULFENIMINE DERIVATIVES OF PENICILLIN AND CEPHALOSPORIN
Direct transformation of α-aminoalkanoates and diaryl or dialkyl disulfides to the corresponding sulfenimines by electrolysis in a CH2Cl2–H2O–MgBr2-(Pt electrodes) system and its application to the sulfenylation of C(6)/C(7)-amino groups of penicillin and cephalosporin are described.