申请人:Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
公开号:US04925969A1
公开(公告)日:1990-05-15
Ethyl-.beta.-benzoyacrylate is reacted with an alkali metal salt of (S)-alanine or an alkali metal salt of N.sup.6 -trifluoroacetyl-L-lysine to form the corresponding Michael addition product, and not less than an equivalent amount of acid is added after completion of the Michael addition to prevent conversion of the (S,S) form of the product to the (R,S) form.
乙基-β-苯甲基丙烯酸酯与(S)-丙氨酸的碱金属盐或N.sup.6-三氟乙酰-L-赖氨酸的碱金属盐反应,形成相应的迈克尔加成产物,完成迈克尔加成后添加不少于等量的酸以防止产物的(S,S)形式转化为(R,S)形式。