发明授权
US5650524A Process for preparing (R)-3-amino-5-methoxychroman 失效
制备(R)-3-氨基-5-甲氧基苯并二氢吡喃的方法

Process for preparing (R)-3-amino-5-methoxychroman
摘要:
A process for preparing (R)-3-amino-5-methoxychroman is provided. The process comprises the steps of (i) dissolving racemic 3-amino-5-methoxychroman and L(+)tartaric acid in water to form the tartrate salt; (ii) heating the solution until a clear solution is obtained; and (iii) crystallizing the tartrate salt by allowing the solution to cool to room temperature.
公开/授权文献
信息查询
0/0