Process for preparing R-(+)-3-morpholino-4-(3- tert-butylamino-2-hydroxypropoxy)-1,2,5-thiadiazole
申请人:FAN Chin-Tsai
公开号:US20110092507A1
公开(公告)日:2011-04-21
The present invention provides a process for preparing optically active timolol. The process comprises the following steps. Firstly, reacting 3-hydroxy-4-morpholino-1,2,5-thiadiazole with an optically active epichlorohydrin in the presence of a solvent system, which has a first volume and a catalyst optionally in the presence of a suitable base to obtain an optically active intermediate product. Secondly, treating the optically active intermediate product with a solution, which has a second volume and comprises tert-butylamine to obtain an optically active timolol. The solvent system used in the first step can be an amide solvent, sulfoxide solvent, cyclic hydrocarbon solvent, ketone solvent, or a heterocyclic solvent. The catalyst used in the first step can be an alkali metal hydroxide, alkali metal carbonate, alkali metal hydrogen carbonate, piperidine, pyridine, triethylamine, potassium hydroxide, sodium hydroxide, potassium carbonate, and other heterocyclic bases.
本发明提供了一种制备光学活性的缬草定的方法。该方法包括以下步骤:首先,在溶剂体系和催化剂的存在下,反应3-羟基-4-吗啉基-1,2,5-噻二唑与光学活性环氧氯丙烷,所述溶剂体系具有第一体积并且可选地在适当碱的存在下,以获得光学活性中间产物。其次,用含有叔丁基胺的溶液(具有第二体积)处理光学活性中间产物,以获得光学活性缬草定。在第一步中使用的溶剂体系可以是酰胺溶剂、亚砜溶剂、环烃溶剂、酮溶剂或杂环溶剂。在第一步中使用的催化剂可以是碱金属氢氧化物、碱金属碳酸盐、碱金属氢碳酸盐、吡啶、吡啶、三乙胺、氢氧化钾、氢氧化钠、碳酸钾和其他杂环碱。