N,N-dialkyl-N′-chlorosulfonylchloroformamidines in heterocyclic synthesis.: II.: Thiazolo-, thiadiazolo-, and oxadiazolo-fused [1,2,4,6]thiatriazine dioxides

N,N-dialkyl-N'-chlorosulfonylchloroformamidines 1 were treated with 2-aminothiazoline, 2-aminothiazoles, 2-aminobenzothiazoles, 2-amino-1,3,4-thiadiazoles, and 2-amino-1,3,4-oxadiazoles to give a 6,7-dihydrothiazolo[3,2-b][1,2,4,6] thiatriazine dioxide 3, a 6,7-dihydrothiazolo[2,3-c][1,2,4,6]thiatriazine dioxide 4, thiazolo[3,2-b][1,2,4,6]thiatriazine dioxides 5, [1,2,4,6]thiatriazino[3,2-b]benzothiazole dioxides 7, a [ 1,2,4,6] thiatriazino[ 3,4-b]benzothiazole dioxide 8, [1,3,4] thiadiazolo[2,3-c][1,2,4,6]thiatriazine dioxides 10, [ 1,3,4] thiadiazolo[3,2-b][ 1,2,4,6]thiatriazine dioxides 11, [1,3,4]oxadiazolo[2,3-c][1,2,4,6]thiatriazine dioxides 13, and [1,3,4]thiadiazolo[3,2-b][1,2,4,6]thiatriazine dioxides 14. Compounds 3, 4, 5, 7, 8, 10, 11, 13, and 14 are derivatives of new ring systems.