Ring Enlargement of Six- to Nine-Membered Heterocycles: Reaction of 3-(Dimethylamino)-2,2-dimethyl-2H-azirine with 3,4-Dihydro-2H-1,2,4-benzothiadiazin-3-one 1,1-Dioxides

Article abstract of DOI:10.1002/hlca.19930760626

Reaction of 3-(dimethylamino)-2,2-dimethyl-2H-azirine (1) and N-substituted 3,4-dihydro-2H-1,2,4-benzothiadiazin-3-one 1,1-dioxides (4) in CHCl3 yields 3-(dimethylamino)-4,5,6,7-tetrahydro-1,2,5,7-benzothiatriazonin-6-one 1,1-dioxides 5, a novel nine-memb