The invention provides a process for producing an optically active butyric acid compound and a production intermediate therefor at high yield and high purity.
The present invention provides a process for producing Compound (6), including reacting Compound (1) with optically active 2-trifluoromethanesulfonyloxybutyrolactone (2a) in the presence of a base or reacting optically active 2-hydroxybutyrolactone (2b) under Mitsunobu reaction conditions, to thereby form Compound (3); reacting Compound (3) with an alcohol and a halogenating agent, to thereby form Compound (4); dehalogenating Compound (4), to thereby form Compound (5); and de-esterifying Compound (5).
本发明提供了一种高产率和高纯度生产光学活性
丁酸化合物及其生产中间体的方法。本发明提供了一种生产化合物(6)的方法,包括在碱的存在下将化合物(1)与光学活性2-
三氟甲烷磺酰氧
丁酸内酯(2a)反应或在Mitsunobu反应条件下将光学活性2-羟基
丁酸内酯(2b)反应,从而形成化合物(3);将化合物(3)与醇和卤代试剂反应,从而形成化合物(4);去卤代化合物(4),从而形成化合物(5);去酯化合物(5)。