A method for preparing diphenol compounds includes adding a hydroxyphenyl carboxylic acid, a tyrosine ethyl ester, hydroxybenzotriazole hydrate and a solvent and stirring to produce a first solution. EDCI HCl is added to the first solution to produce a first mixture. Ethyl acetate is added to the first mixture to produce a second mixture. The second mixture is added to sodium chloride to produce a third mixture having layer separation. An aqueous layer is removed from the third mixture. The third mixture is extracted with reagents after the aqueous layer has been removed from the third mixture to produce a fourth mixture. Magnesium sulfate is added to the fourth mixture to produce a fifth mixture. The fifth mixture is filtered to produce filtrate. The filtrate is concentrated. Crystallization of the concentrated filtrate is induced. Methylene chloride is added to the crystallized filtrate to produce a solid product.
制备二
苯酚化合物的方法包括加入羟基苯基
羧酸、
酪氨酸乙酯、
羟基苯并三唑水合物和溶剂并搅拌,生成第一种溶液。向第一种溶液中加入 E
DCI HCl,生成第一种混合物。向第一种混合物中加入
乙酸乙酯,生成第二种混合物。将第二种混合物加入
氯化钠中,生成第三种混合物,并进行分层。从第三种混合物中去除
水层。从第三种混合物中去除
水层后,用试剂萃取第三种混合物,得到第四种混合物。在第四种混合物中加入
硫酸镁,生成第五种混合物。过滤第五种混合物,得到滤液。滤液浓缩。诱导浓缩滤液结晶。向结晶滤液中加入
二氯甲烷,生成固体产品。