An improved process for the preparation of a heteroaryl acetamide from a heteroaryl α-hydroxyacetamide is provided. The process comprises directly hydrogenating the heteroaryl α-hydroxyacetamide in the presence of a strong acid, a halide and a catalyst wherein the molar ratio of the starting heteroaryl α-hydroxyacetamide to water at the initiation of hydrogenolysis is at least about 2:1. In one embodiment, the heteroaryl acetamide is zolpidem and the heteroaryl α-hydroxyacetamide is α-hydroxyzolpidem.
提供了一种改进的方法,用于从杂环α-羟基乙酰胺制备杂环醋酰胺。该方法包括在强酸、卤化物和催化剂的存在下直接加氢杂环α-羟基乙酰胺,其中在氢解反应开始时,起始杂环α-羟基乙酰胺与
水的摩尔比至少为2:1。在一个实施例中,杂环醋酰胺是
唑吡坦,而杂环α-羟基乙酰胺是α-羟基
唑吡坦。