[EN] IMPROVED METHOD OF MAKING NEVIRAPINE<br/>[FR] PROCEDE DE PREPARATION DE LA NEVIRAPINE AMELIORE
申请人:BOEHRINGER INGELHEIM CHEMICALS
公开号:WO2004002988A1
公开(公告)日:2004-01-08
A process for making nevirapine, comprising the following steps: (a) reacting a 2-halo-3-pyridinecarbonitrile of the formula (I), wherein X is a fluorine, chlorine, bromine or iodine atom, preferably chlorine or bromine, with cyclopropylamine, to yield 2-(cyclopropylamino)-3-pyridinecarbonitrile; (b) hydrolyzing the 2-(cyclopropylamino)-3-pyridinecarbonitrile to yield 2-(cyclopropylamino)-3-pyridine carboxylic acid; (c) isolating the 2-(cyclopropylamino)-3-pyridine carboxylic acid from the reaction medium; (e) treating the 2-(cyclopropylamino)-3-pyridine carboxylic acid with a chlorinating agent, to yield 2-(cyclopropylamino)-3-pyridinecarbonyl chloride; (f) reacting the 2-(cyclopropylamino)-3-pyridine carbonyl chloride with a 2-halo-4-methyl-3-pyridinamine of the formula (I), wherein X is a fluorine, chlorine, bromine or iodine atom, preferably chlorine or bromine, to produe an N-(2-halo-4-methyl-3-pyridinyl)-2-(cyclopropylamino)-3-pyridinecarboxamide; and (g) cyclizing the N-(2-halo-4-methyl-3-pyridinyl)-2-(cyclopropylamino)-3-pyridinecarboxamide by treatment with a strong base, to yield nevirapine.
一种制备奈韦拉平的方法,包括以下步骤:(a)将式(I)的2-卤代-3-吡啶腈(其中X为氟、氯、溴或碘原子,优选氯或溴)与环丙基胺反应,得到2-(环丙基氨基)-3-吡啶腈;(b)水解2-(环丙基氨基)-3-吡啶腈,得到2-(环丙基氨基)-3-吡啶羧酸;(c)从反应介质中分离出2-(环丙基氨基)-3-吡啶羧酸;(e)用氯化剂处理2-(环丙基氨基)-3-吡啶羧酸,得到2-(环丙基氨基)-3-吡啶羰氯;(f)将2-(环丙基氨基)-3-吡啶羰氯与式(I)的2-卤代-4-甲基-3-吡啶胺(其中X为氟、氯、溴或碘原子,优选氯或溴)反应,得到N-(2-卤代-4-甲基-3-吡啶基)-2-(环丙基氨基)-3-吡啶羧酰胺;(g)通过强碱处理N-(2-卤代-4-甲基-3-吡啶基)-2-(环丙基氨基)-3-吡啶羧酰胺,环化得到奈韦拉平。