A One-Pot Synthesis of 2H-1,2,4-Thiadiazin-3(4H)-one 1,1-Dioxides and 5,6-Dihydro-1,4,3-oxathiazin-2(3H)-one 4,4-Dioxides

Article abstract of DOI:10.1055/s-1988-27692

Dianions of alkanesulfonamides add to nitriles, and the resultant imine dianions are cyclized with a carbonyl equivalent to afford the known 2H-1,2,4-thiadiazin-3-(4H)-one 1,1-dioxide ring system.The use of aldehydes as electrophiles provides the novel 5,