申请人:STERLING DRUG INC.
公开号:EP0055453A2
公开(公告)日:1982-07-07
5-(Py-Y)-1H-benzimidazol-2-ol or 5-(Py-Y-1H-benzimidazole-2-thiol or lower-alkyl ethers or thioethers thereof or pharmaceutically-acceptable acid-addition salts thereof where Y is a direct linkage or lower-alkylene having one or two carbon atoms and Py is 4- or 3-pyridinyl, optionally having one or two lower-alkyl substituents, or 1-oxide of such pyridinyl, useful as cardiotonics, are prepared by reacting 4-(Py-Y)-1,2-benzenediamine with urea or carbony-Idiimidazole to produce 5-(Py-Y)-1H-benzimidazol-2-ol or with thiourea, an alkali metal lower-alkyl xanthate orthiocar- bonyldiimidazole to produce 5-(Py-Y)-1H-benzimidazole-2-thiol and by reacting 5-(Py-Y)-lH-benzimidazole-2-thiol with a lower-alkylating agent to produce 2-(lower-alkylthio-)-5-(Py-Y)-1 H-benzimidazole. 2-(Lower-alkoxy)-5-(Py-Y)-1 H-benzimidazoles are prepared by reacting 4-(Py-Y)1,2-benzenediamine with tetra-(lower-alkoxy)methane. The N-oxides may be prepared by reaction with a per-organic acid in a suitable solvent.
5-(Py-Y)-1H-苯并咪唑-2-醇或 5-(Py-Y)-1H-苯并咪唑-2-硫醇或其低级烷基醚或硫醚或其药学上可接受的酸加成盐,其中 Y 为直接连接或具有一个或两个碳原子的低级亚烷基,Py 为 4-或 3-吡啶基,可选具有一个或两个低级烷基取代基,或此类吡啶基的 1-氧化物,可用作强心剂、4-(Py-Y)-1,2-苯二胺与脲或碳二咪唑反应生成 5-(Py-Y)-1H-苯并咪唑-2-醇,或与硫脲反应生成 5-(Py-Y)-1H-苯并咪唑-2-醇、碱金属低级烷基黄原酸盐原碳二咪唑,生成 5-(Py-Y)-1H-苯并咪唑-2-硫醇,并将 5-(Py-Y)-lH-苯并咪唑-2-硫醇与低级烷基化剂反应,生成 2-(低级烷基硫代)-5-(Py-Y)-1H-苯并咪唑。2-(低级烷氧基)-5-(Py-Y)-1 H-苯并咪唑是通过 4-(Py-Y)1,2-苯二胺与四(低级烷氧基)甲烷反应制备的。N-氧化物可通过在合适的溶剂中与过有机酸反应制备。