摘要:
4H-1,3-thiazines, easily prepared from 1-thia-3-azabutadienes, appear electroactive in protic medium. Controlled potential electroreductions of 4H-1,-3-thiazines lead either to substituted 6H-1,3-thiazines or to pyrroles according to the nature of the C-4 substituent and the acidity of the supporting electrolyte.