Process for the Preparation of 5-(4-[4-(5-Cyano-3-Indolyl)Butyl]-1-Piperazinyl)Benzofuran-2-Carboxamide
申请人:Bathe Andreas
公开号:US20080293943A1
公开(公告)日:2008-11-27
The invention relates to a process for the preparation of 5-(4-[4-(5-cyano-3-indolyl)butyl]-1-piperazinyl)benzofuran-2-carboxamide and/or one of its physiologically acceptable salts, characterised in that a compound of the formula (I), in which L denotes Cl, Br, I, SO
2
F, SO
2
CF
3
, SO
2
C
2
F
5
, is reacted with 3-(4-piperazin-1-ylbutyl)indole-5-carbonitrile by transition-metal-catalysed coupling by means of Pd complexes, and/or in that the 5-(4[4-(5-cyano-3-indolyl)butyl]-1-piperazinyl)benzofuran-2-carboxamide formed is converted into one of its acid-addition salts by treatment with an acid, and to a second process, characterised in that a compound of the formula (II), as the base or HX salt (where X=Cl, BR), is reacted with 3-(4-oxobutyl)-1H-indole-5-carbonitrile by reductive amination, and/or in that 5-(4-[4-(5-cyano-3-indolyl)butyl]-1-piperazinyl)benzofuran-2-carboxamide is converted into one of its acid-addition salts by treatment with an acid.
本发明涉及一种制备5-(4-[4-(5-氰基-3-吲哚基)丁基]-1-哌嗪基)苯并呋喃-2-羧酰胺和/或其生理上可接受的盐的方法,其特征在于将式(I)的化合物与3-(4-哌嗪-1-基丁基)吲哚-5-碳腈经过Pd配合物的过渡金属催化偶联反应,其中L表示Cl、Br、I、SO2F、SO2CF3、SO2C2F5,或者将形成的5-(4-[4-(5-氰基-3-吲哚基)丁基]-1-哌嗪基)苯并呋喃-2-羧酰胺通过处理酸转化为其酸加成盐中的一种;以及第二种方法,其特征在于将式(II)的化合物作为碱或HX盐(其中X=Cl、BR)与3-(4-氧代丁基)-1H-吲哚-5-碳腈通过还原胺化反应,或者将5-(4-[4-(5-氰基-3-吲哚基)丁基]-1-哌嗪基)苯并呋喃-2-羧酰胺通过处理酸转化为其酸加成盐中的一种。