This invention relates to an improved process for synthesizing (±)-2-Amino-N-[2-(2,5-dimethoxyphenyl]-2-hydroxyethyl acetamide monohydrochloride in good yield and in a cost effective manner from 1-(2,5-dimethoxyphenyl)-2-bromoethanone by reacting the same with hexamine in the presence of novel solvent system comprising Tetrahydrofuran and water. The resulting aminoethanone is acylated with haloacetylchloride and sodium acetate in acetone-water solvent system. This product is reduced selectively first with sodium borohydride and subsequently with stannous chloride. This product is converted in situ to the corresponding hydrochloride salt immediately after reduction on its own.
本发明涉及一种改进的合成(±)-2-
氨基-N-[2-(2,5-二
甲氧基苯基]-2-羟乙酰胺单盐酸盐的方法,该方法产率高,成本效益好。从1-(2,5-二
甲氧基苯基)-2-
溴乙酮出发,在新的溶剂体系
四氢呋喃和
水的存在下与
六胺反应。所得的
氨基乙酮在
丙酮-
水溶剂体系中与卤代
乙酰氯和
醋酸钠酰化。该产物先用
硼氢化钠选择性还原,然后再用
氯化亚锡还原。该产物在还原后立即原位转化为相应的盐酸盐。