Method for the preparation of 1,4,-anhydro-2-deoxy-d-erythropentitol
    4.
    发明授权
    Method for the preparation of 1,4,-anhydro-2-deoxy-d-erythropentitol 失效
    制备1,4 - 脱氢-2-脱氧-D-红血球糖醇的方法

    公开(公告)号:US5789572A

    公开(公告)日:1998-08-04

    申请号:US864962

    申请日:1997-05-29

    CPC分类号: C07H3/02

    摘要: Proposed is a novel synthetic route for the preparation of 1,4-anhydro-2-deoxy-D-erythropentitol, which is a useful material in the synthesis of antibiotics, starting from 2-deoxy-D-ribose via 2-deoxy-D-erythropentitol as an intermediate. 2-Deoxy-D-erythropentitol can be prepared by the hydrogenation of 2-deoxy-D-ribose with Raney nickel as the hydrogenating catalyst in a high efficiency and at low costs as compared with the prior art methods using, for example, sodium borohydride as the hydrogenating agent. 2-Deoxy-D-erythropentitol is subjected to a dehydration cyclization reaction to be converted into 1,4-anhydro-2-deoxy-D-erythropenti-tol under a substantially anhydrous condition which is accomplished by heating a reaction mixture containing 2-deoxy-D-erythropentitol suspended in an organic solvent capable of forming an azeotropic mixture with water such as toluene under reflux so as to azeotropically remove the water condensate.

    摘要翻译: 提出了一种用于制备1,4-脱水-2-脱氧-D-赤藓糖醇的新型合成途径,它是抗生素合成中的有用材料,从2-脱氧-D-核糖通过2-脱氧-D 作为中间体。 与现有技术方法相比,2-脱氧-D-赤红葡萄糖可以通过用阮内镍作为氢化催化剂以高效率和低成本氢化来制备,使用例如硼氢化钠 作为氢化剂。 将脱氧-D-红血球醇进行脱水环化反应,在基本无水条件下转化为1,4-脱水-2-脱氧-D-红胸肉汤,其通过加热含有2-脱氧的反应混合物 D-赤式甘油二异氰酸酯悬浮在能够与水如甲苯在回流下形成共沸混合物的有机溶剂中,以共沸除去水的缩合物。