申请人:Astra Aktiebolag
公开号:US05650524A1
公开(公告)日:1997-07-22
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.
提供了一种制备(R)-3-氨基-5-甲氧基色酚的过程。该过程包括以下步骤:(i)将外消旋3-氨基-5-甲氧基色酚和L(+)酒石酸溶解在水中形成酒石酸盐;(ii)加热溶液直到得到清澈的溶液;(iii)通过让溶液冷却至室温结晶酒石酸盐。