Abstract o-Bromoarylsulfonylated amidines prepared either by acylation of amidine with o- bromoarylsulfonyl chloride or through the reaction of o-bromoarylsulfoamide with lactime ether underwent Cu (I)-catalyzed intramolecular cyclization to give 4 H-1, 2, 4- benzothiadiazine-1, 1-dioxides in good yield. By varying substituents on arylsulfonyl moieties, amidines, and lactime ethers, a small library of structurally diverse 4 H-1, 2, 4- ...
