申请人:Kissei Pharmaceutical Co., Ltd.
公开号:EP1146035A1
公开(公告)日:2001-10-17
Crystal polymorphism of 2-[4-[2-[[1s,2R]-2-hydroxy-2-(4-hydroxyphenyl)-1-methyl ethyl]amino]ethyl]phenoxy]acetic acid which has potent β2 adrenergic receptor stimulating and β3-adrenergic receptor stimulating effects, is useful in relieving a pain, promoting calculi removal, etc. in urinary lithiasis and shows intense diffraction peaks at 10.8, 19.1, 19.3, 19.8, 20.6 and 27.0° in the powder x-ray diffractometry pattern at a diffraction angle (2/θ0±0.1). It is produced by, for example, hydrolyzing ethyl 2-[4-[2-[[1S,2R)-2-hydroxy-2-(4-hydroxyphenyl)-1-methylethyl]amino]ethy]phenoxy]acetate phosphate by using sodium hydroxide, adding an aqueous solution of phosphoric acid at 40°C or above to give the above compound, adding a solvent mixture comprising methanol with water or methanol and then stirring in a suspended state at from 40°C to the reflux point for 30 minutes to several hours.
2-[4-[2-[[1s,2R]-2-羟基-2-(4-羟基苯基)-1-甲基乙基]氨基]乙基]苯氧基]乙酸的晶体多态性,它具有强烈的刺激β2肾上腺素能受体和刺激β3肾上腺素能受体的作用,可用于缓解疼痛、促进结石清除等。在粉末 X 射线衍射图中,它在 10.8、19.1、19.3、19.8、20.6 和 27.0°处显示出强烈的衍射峰,衍射角为(2/θ0±0.1)。其制备方法是,例如,用氢氧化钠水解 2-[4-[2-[[1S,2R)-2-羟基-2-(4-羟基苯基)-1-甲基乙基]氨基]乙基]苯氧基]乙酸乙酯磷酸盐,在 40℃或以上温度下加入磷酸水溶液,得到上述化合物,再加入由甲醇与水或甲醇组成的溶剂混合物,然后在 40℃至回流点的悬浮状态下搅拌 30 分钟至数小时。