反应详情

The compound (II) can be prepared by a similar process to the process for preparing 1',2'-diacetyl-L-biopterin [Bernard Schircks, Jost H. Bieri and Max Viscontini, Helvetica Chimica Acta, 60(1), 211 (1977)]. According to the process, L-rhamnose hydrate is reacted with ethanethiol. The obtained L-rhamnose-diethylmer-captal is converted to 5-deoxy-L-arabinose through 1,1-diethylsulfonyl-L-rhamnose. 5-Deoxy-L-arabinose is reacted with phenylhydrazine to obtain 5-deoxy-L-arabinose-phenylhydrazone. 5-Deoxy-L-arabinose-phenyl-hydrazone is reacted with an acylating agent. The obtained 2,3,4-triacyl-5-deoxy-L-arabinose-phenylhyrazone is reacted with 2,4,5-triamino-6-hydroxy-pyrimidine dihydrochloride, and then oxidized with an oxidizing agent such as iodine to obtain a 1',2'-diacyl-L-biopterin. L-Biopterin can be obtained by deacylation of the 1',2'-diacyl-L-biopterin.