The final rearrangement products depend upon experimental conditions. Thus, when an alkali salt of an acyl ester of a monohydroxamic acid, RCON (K) OCOR', is heated alone, the isocyanate may be isolated; but when it is heated with mater, the isocyanate generally reacts to give an amine or a disubstituted urea, and when alcohol is employed as a solvent, a urethan is usually formed.
