(6R)-Tetrahydrobiopterin cofactor for aromatic amino acid hydroxylases was synthesized stereoselectively by catalytic hydrogenation of biopterin over platinum oxide at pH 11.4 and subsequent crystallization from hydrochloric acid and ethanol.
[EN] PROCESSES FOR PREPARING TETRAHYDROBIOPTERIN, AND ANALOGS OF TETRAHYDROBIOPTERIN<br/>[FR] PROCEDES DE PREPARATION DE TETRAHYDROBIOPTERINE ET D'ANALOGUES DE LA TETRAHYDROBIOPTERINE