The present invention relates to a process for efficiently producing an optically active 2-bromocarboylic acid and an optically active 2-sulfonyloxycarboxylic acid, which are important in the production of medicinal compounds and so forth. An optically active 2-sulfonyloxycarboxylic acid ester is subjected to deprotection under acid conditions to obtain an optically active 2-sulfonyloxycarboxylic acid. A metal bromide is caused to act on the acid to brominate it with configuration inversion at position 2 to thereby produce an optically active 2-bromocarboxylic acid. The resultant optically active 2-bromocarboxylic acid is isolated/purified by subjecting it to a step in which the acid is crystallized and separated as a salt with a base. Thus, an optically active 2-bromocarboxylic acid having a high chemical purity and high optical purity can be produced.
本发明涉及一种有效生产光学活性2-
溴羧酸和光学活性2-磺酰氧
羧酸的方法,这些化合物在药物合成等方面非常重要。将光学活性2-磺酰氧
羧酸酯在酸性条件下去保护,得到光学活性2-磺酰氧
羧酸。然后,使
金属
溴化物作用于该酸,使其在2位发生构型反转
溴化,从而生产光学活性2-
溴羧酸。通过将所得的光学活性2-
溴羧酸结晶并与碱形成盐分离纯化,从而生产出具有高
化学纯度和高光学纯度的光学活性2-
溴羧酸。