O 2-(Ethanesulfohydroxamic acid) and O 2-(N-methoxy-2-ethanesulfonylamido) diazen-1- ium-1, 2-diolates (4− 7), a novel type of O 2-(protected) diazeniumdiolate, were synthesized using a key thioacetate oxidation reaction. Nitric oxide release studies showed that O 2-(N- methoxy-2-ethanesulfonylamido) diazeniumdiolates 5 and 7 released NO in a nonphysiological alkaline buffer, in the presence of bases such as the basic natural amino ...