150-15 1", 74% from cyclohexaneacetamide; Nt-butyl-N-cyclohexylurea, mp 226 f 2"(lit." mp 227"), 88% from cyclohexanecarboxamide. The isocyanate could also be hydrolyzed directly to the amine hydrochloride 5 by adding the dimethylformamide solution to hydrochloric acid and heating the mixture under reflux. For example, from cyclocarboxamide a 49% yield of cyclohexylamine hydrochloride was obtained.
