The present invention provides a process of preparing a compound of the formula [I]:
wherein X is a group of the formula: —N═ or —CH═; R
1
is a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group, a cyano group or an amino group optionally substituted by a lower alkyl group; Ring A is a nitrogen-containing heterocyclic group; Ring B is an optionally substituted benzene ring or an optionally substituted pyridine ring; and R
3
is a hydrogen atom or a lower alkyl group, or a pharmaceutically acceptable salt thereof, which is useful as an inhibitor of activated blood coagulation factor X.
本发明提供了一种制备式[I]化合物的方法:其中X是公式:—N═或—CH═ 的基团;R1是氢原子、卤素原子、低烷基、低烷氧基、
氰基或者是可选择被低烷基取代的
氨基基团;环A是含有氮杂环基团;环B是可选择被取代的苯环或者是可选择被取代的
吡啶环;R3是氢原子或者是低烷基,或者其药学上可接受的盐,该化合物是一种活化血凝因子X
抑制剂。