A process for preparing a compound represented by general formulae (5) and (6) in the following reaction scheme or salts thereof, wherein R
1
represents a protective group for a nitrogen atom; R
2
represents a methanesulfonyl group or p-toluenesulfonyl group; R
3
represents a hydrogen atom, an aralkyl group, or an alkyl group having 1 to 6 carbon atoms; and X represents a halogen atom.
1
The above process is useful as an industrial process for preparing intermediates of anticoagulant aromatic amidine derivatives described in Japanese Patent Application Laid-Open (kokai) No. 208946/1993.
以下反应方程式中,制备由通式(5)和(6)表示的化合物或其盐的过程,其中R1代表氮原子的保护基;R2代表甲磺酰基或对
甲苯磺酰基;R3代表氢原子、芳基烷基或具有1至6个碳原子的烷基;X代表卤素原子。该过程可用作制备抗凝药芳香酰胺衍
生物中间体的工业过程,该中间体在日本专利申请公开(kokai)号208946/1993中有描述。