申请人:Banyu Pharmaceutical Co., Ltd.
公开号:US06114524A1
公开(公告)日:2000-09-05
The present invention relates to a process for producing a compound represented by the formula (II): ##STR1## wherein X is a halogen atom, each of A.sup.1, A.sup.2 and A.sup.3 are the same or different and are selected from a carbon atom or a nitrogen atom, provided that at least A.sup.1, A.sup.2, or A.sup.3 is a nitrogen atom. Each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are the same or different and are selected from a hydrogen atom, a lower alkyl group, a cyano group, a carboxyl group, a lower alkoxycarbonyl group, a halogen atom, and a nitro group. It is also provided that where R.sup.1 and R.sup.2 are adjacent to each other, R.sup.1 and R.sup.2 may be combined with each other to form a 5- or 6-membered ring which may carry on the ring thereof one substituent selected from the group consisting of a lower alkyl group, a nitrile group, a carboxyl group, a lower alkoxycarbonyl group, a carbamoyl group, a halogen atom, a nitro group, and an amino-(lower alkyl) group. The compound is prepared by reacting a compound represented by the formula (I): ##STR2## with a quaternary ammonium halide in the presence of phosphorus pentoxide.
本发明涉及一种制备由以下公式(II)表示的化合物的方法:其中X是卤素原子,A.sup.1、A.sup.2和A.sup.3中的每一个相同或不同,选自碳原子或氮原子,前提是至少A.sup.1、A.sup.2或A.sup.3是氮原子。R.sup.1、R.sup.2、R.sup.3和R.sup.4中的每一个相同或不同,选自氢原子、低碳基团、氰基、羧基、低碳氧羰基团、卤素原子和硝基团。还提供了当R.sup.1和R.sup.2相邻时,R.sup.1和R.sup.2可以结合在一起形成一个5-或6-成员环,该环上可以携带一个取自以下群组的取代基:低碳基团、腈基、羧基、低碳氧羰基团、氨基甲酰基团、卤素原子、硝基团和氨基-(低碳基)基团。该化合物是通过在磷酸五氧化磷存在下将由以下公式(I)表示的化合物与季铵盐卤素反应而制备的。