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    • 6. 发明授权
    • 3,4-디히드록시부탄산 및 염과 유도된 락톤의 제조방법
    • 3,4-디히드록시부탄산및염과유도된락톤의제조방3,4
    • KR100470005B1
    • 2005-02-04
    • KR1020017015302
    • 2001-03-05
    • 미시간 스테이트 유니버시티
    • 홀링스워쓰,라우레아이.
    • C07C51/00
    • C07D307/33C07C51/285C07D315/00C07C59/06C07C59/10
    • An improved process for the preparation of 3,4-dihydroxybutanoic acid (1) and salts thereof from a D- or L-hexose source is described. The process uses an alkali metal or alkaline earth metal hydroxide and peroxide oxidizing agent to convert the D- or L-hexose source to (1) by maintaining a low concentration of base and oxidizing agent in the reaction mixture at any one time and by maintaining a temperature between about 25° C. and 80° C. Upon acidification of the reaction mixture the 3-hydroxylactone is produced. The compound (1) is useful as a chemical intermediate to naturally occurring fatty acids and is used to prepare 3,4-dihydroxybutanoic acid-gamma-lactone (2) and furanone (3), particularly stereoisomers of these compounds.
    • 描述了从D-或L-己糖源制备3,4-二羟基丁酸(1)及其盐的改进方法。 该方法使用碱金属或碱土金属氢氧化物和过氧化物氧化剂,通过在任何一个时间在反应混合物中保持低浓度的碱和氧化剂,并通过维持在(1)中的D-或L-己糖源 约25℃的温度; C.和80°; 当反应混合物酸化时,产生3-羟基内酯。 化合物(1)可用作天然存在的脂肪酸的化学中间体,并用于制备3,4-二羟基丁酸-γ-内酯(2)和呋喃酮(3),特别是这些化合物的立体异构体。