Synthesis of oxidized 1,2,3-thiadiazines by hydroperoxy- induced ring enlargement of 2-benzenesulfonylaminoisothiazolium salts

Article abstract of DOI:10.1002/jhet.5570360441

Oxidation of 2-benzenesulfonylaminoisothiazolium salts 1, 2 and their imines 3, 4 with hydrogen peroxide gave 1,2,3- thiadiazine 1-oxides 5, 6, which were converted into the corresponding 1,2,3-thiadiazine 1,1-dioxides 7, 8 using m- chloroperoxybenzoic ac