It has been demanded to provide a process for industrially producing an intermediate for a compound that exhibits an inhibitory effect on activated blood coagulation factor X and is useful as a preventive and/or therapeutic agent for thrombotic diseases. The present invention provides a process for producing the (R)-α-phenylethylamine salt of (S)-3-cyclohexene-1-carboxylic acid, comprising reacting 3-cyclohexene-1-carboxylic acid and (R)-α-phenylethylamine using a mixed solvent of water and acetone or a mixed solvent of water and ethyl acetate as a solvent.
本发明旨在提供一种用于工业生产一种中间体的方法,该中间体表现出对激活的血
凝血因子X具有抑制作用,并且可用作预防和/或治疗血栓性疾病的药物。本发明提供了一种生产(S)-3-
环己烯-1-
羧酸(R)-
α-苯乙胺盐的方法,包括使用
水和
丙酮或
水和
乙酸乙酯的混合溶剂作为溶剂,将3-
环己烯-1-
羧酸和(R)-
α-苯乙胺反应。