Nitrosation of α,β-Unsaturated Carboxamide with Nitric Oxide and Triethylsilane Catalyzed by Cobalt(II) Complex

In the presence of a catalytic amount of N,N′-bis(2-ethoxycarbonyl-3-oxobutylidene)ethylenediaminatocobalt(II), various α,β-unsaturated carboxamides are converted to the corresponding 2-nitrosocarboxamides regioselectively in good yields on treatment with nitric oxide and triethylsilane at room temperature.