申请人:Henan Newland Pharmaceutical Co., Ltd
公开号:US20140350295A1
公开(公告)日:2014-11-27
The present invention relates to the field of chemical synthesis, particularly to a method of synthesizing levorotatory p-hydroxyphenylglycine compounds, which eliminates the subsequent processes of resolution, racemization processings, etc., simplifies operational steps; and acids with small organic molecule are chosen as catalyst in the second step, which not only is conducive to the realization of a industrialized production, but also makes the ee value of the end products be 88.1˜98.0% by determining the catalyst, the reaction solvent, the reactive substance, the reaction temperature, and the reaction duration; non-aqueous solvent is used in the second step, to avoid the discharging of phenol-containing waste water, thus environmental pollution is reduced.
本发明涉及化学合成领域,特别是涉及一种合成左旋p-羟基苯乙氨酸化合物的方法,该方法消除了后续的分离、消旋处理等工艺,简化了操作步骤;在第二步中选择小有机分子酸作为催化剂,不仅有利于实现工业化生产,而且通过确定催化剂、反应溶剂、反应物、反应温度和反应时间,使最终产品的ee值为88.1~98.0%;在第二步中使用非水溶剂,以避免排放含酚废水,从而减少环境污染。