The present invention relates to a process for the preparation of an amide from a carboxylic acid chloride and an organic molecule comprising both a primary amine group and a tertiary amine group, wherein the nitrogen atom of the tertiary amine group is comprised in a non-aromatic heterocycle and wherein the amide bond forms selectively with the primary amine group, comprising the step of reacting the carboxylic acid chloride with an organic molecule comprising both the primary amine group and the tertiary amine group, in the presence of imidazole. This is particularly useful in the preparation of amides from quinuclidin-3-amine, such as for the preparation of encenicline ((R) -7-chloro-N-(quinuclidin-3-yl)benzo[b]thiophene-2-carboxamide) from 7-chloro-benzo[b]thiophene-2-carboxylic acid chloride and (R)- quinuclidin-3-amine in the presence of imidazole. Encenicline is a nicotinic acetylcholine receptor agonist useful as a neuromodulator for the treatment of e.g. cognitive impairment, schizophrenia and Alzheimer's disease.
本发明涉及一种从
羧酸氯化物和同时含有一次胺基和三次胺基的有机分子制备酰胺的方法,其中三次胺基的氮原子包含在非芳香杂环中,且酰胺键选择性地与一次胺基形成,包括以下步骤:在
咪唑存在下,将
羧酸氯化物与同时含有一次胺基和三次胺基的有机分子反应。这在从喹诺啡-3-胺制备酰胺方面特别有用,例如从7-
氯苯并[b]
噻吩-2-
羧酸氯化物和(R)-喹诺啡-3-胺在
咪唑存在下制备encenicline ((R)-7-
氯-N-(喹诺啡-3-基)苯并[b]
噻吩-2-羧胺)。Encenicline是一种
尼古丁乙酰胆碱受体激动剂,可作为神经调节剂用于治疗认知障碍、精神分裂症和阿尔茨海默病等疾病。