申请人:Nisshin Flour Milling Co., Ltd.
公开号:US05043446A1
公开(公告)日:1991-08-27
A process of preparing l-biopterin is disclosed which comprises the steps of: Subjecting to selective Grignard reaction D-ribose having the hydroxyl groups in the 2- and 3-positions protected by an acetal group to give 6-deoxy-3,4-O-alkylidene allitol; subjecting the 1- and 2-positions of said allitol to oxidative cleavage to form 5-deoxy-2,3-O-alkylidene-L-ribose followed by deacetalization to give 5-deoxy-L-ribose; reacting 5-deoxy-L-ribose with a hydrazine compound to form a 5-deoxy-L-ribose hydrazone compound; and subjecting said hydrazone compound to condensation reaction with an acid addition salt of 4-hydroxy-2,5,6-triaminopyrimidine followed by oxidation.
公开了一种制备L-生物蝶啶的方法,包括以下步骤:将具有2-和3-位羟基被乙缩醛基保护的D-核糖经选择性格氏试剂反应,得到6-去氧-3,4-O-烷基亚甲基-D-己糖;将所述己糖的1-和2-位进行氧化裂解,形成5-去氧-2,3-O-烷基亚甲基-L-核糖,然后脱去乙缩醛基得到5-去氧-L-核糖;将5-去氧-L-核糖与肼类化合物反应,形成5-去氧-L-核糖肼类化合物;将所述肼类化合物与4-羟基-2,5,6-三氨基嘧啶的酸盐进行缩合反应,然后进行氧化。