The synthesis of some bis(1‐substituted cyclohexyl) nitroxides

The nitrile and several esters of 1‐nitrosocyclohexanecarboxylic acid all gave the expected nitroxides upon thermal decomposition in toluene. These bis(1‐substituted cyclohexyl) nitroxides could not be isolated from the decomposition product and were therefore prepared in the pure form by another route, involving peracid‐oxidation of the corresponding bis(1‐substituted cyclohexyl) amines. The nitroxides were stable in the solid state, but in solution a slow decomposition occurred. Hydrogenation of the nitroxides yielded the corresponding hydroxylamines. The ESR parameters of the nitroxides are given.