Generation of thionitroso compounds by benzisothiazole ring opening
Abstract
Oxidation of 3-amino-2-phenylindazole (3) or thermolysis of 3-azido-2-phenylindazole (4) gives 2-cyanoazobenzene (5) quantitatively; thermolysis or photolysis of 3-azido-2, 1-benzisothiazoles (1) induces similar ring opening to give the transient 2-cyanothionitrosobenzenes (2).