A process for preparing O-carbamoyl aminoalcohols represented by Formula I wherein: n is an integer from 0 and 5; R1, R2, R3 and R4 are individually selected from the group consisting of hydrogen, alkyl, cycloalkyl, substituted or unsubstituted aryl and arylalkyl the aryl portion of which may be unsubstituted or substituted: R5 and R6 are individually selected from the group consisting of hydrogen, alkyl or arylalkyl the aryl portion of which may be unsubstituted or substituted; or R1 and R5 together with the carbon and nitrogen to which they are attached may form an unfused or fused heterocyclic ring having from 4 to 10 members. comprising reacting an aminoalcohol represented by Formula II wherein n, R1, R2, R3, R4, R5 and R6 are as defined; with a cyanate and an excess of an acid in an organic solvent medium.