Process for producing optically active 2-[6-(hydroxymethyl)-1,3-dioxan-4yl]acetic acid derivatives
申请人:——
公开号:US20030040634A1
公开(公告)日:2003-02-27
This invention provides a process for producing optically active 2-[6-(hydroxymethyl)-1,3-dioxan-4-yl]acetic acid derivatives, which are of value as intermediates of drugs, from inexpensive starting materials without using any special equipment such as that required for super-low temperature reactions.
A process for producing optically active 2-[6-(hydroxymethyl)-1,3-dioxan-4-yl]acetic acid derivatives which comprises
reacting an acetic acid derivative at a temperature of not less than −30° C. with an enolate prepared by permitting either a base or a metal having a valency of 0 to act on the derivative to produce a hydroxyoxohexanoic acid derivative,
reducing this compound with the aid of a strain of microorganism to provide a halomethyldioxanylacetic acid derivative,
treating this compound with an acetalizing agent in the presence of an acid catalyst to provide a halomethyl-dioxanylacetic acid derivative,
reacted with an acyloxylating agent to provide a acyloxymethyldioxanylacetic acid derivative, and
subjecting this compound to solvolysis in the presence of a base.
这项发明提供了一种制备光学活性的2-[6-(羟甲基)-1,3-二氧杂环戊-4-基]乙酸衍生物的方法,这些衍生物是药物中间体,从廉价的起始物质开始制备,而不需要使用任何特殊设备,如超低温反应所需的设备。制备光学活性的2-[6-(羟甲基)-1,3-二氧杂环戊-4-基]乙酸衍生物的方法包括:在不低于-30℃的温度下,将乙酸衍生物与由碱或价态为0的金属作用于衍生物而制备的烯醇酸反应,以产生羟基氧代己酸衍生物;用微生物菌株的帮助还原该化合物,以提供卤代甲基二氧杂环戊基乙酸衍生物;在酸催化剂的存在下,用缩醛试剂处理该化合物,以提供卤代甲基二氧杂环戊基乙酸衍生物;用酰氧化试剂反应,以提供酰氧基甲基二氧杂环戊基乙酸衍生物;并在碱存在下对该化合物进行溶剂解,以得到最终产物。