It was employed in the stereoselective synthesis of meso-N,N′-dicarbethoxy-2,4-diaminopentane and meso-2,4-diaminopentane.2-Hydroxy-4,6-dimethylpyrimidine hydrochloride was employed in the stereoselective synthesis of meso-N,N′-dicarbethoxy-2,4-diaminopentane and meso-2,4-diaminopentane It was employed in the stereoselective synthesis of meso-N,N′-dicarbethoxy-2,4-diaminopentane and meso-2,4-diaminopentane.