申请人:Asahi Kasei Kabushiki Kaisha
公开号:US06495701B1
公开(公告)日:2002-12-17
The present invention is directed to processes for the preparation of a compound useful for treating diabetes, obesity, hyperlipidemia and the like, which compound is represented by the formula (1):
wherein R1 represents a lower alkyl group or a benzyl group; *1 represents an asymmetric carbon atom; R2 hydrogen atom, a halogen atom or a hydroxyl group; and A represents one of the following groups:
wherein X represents NH, O or S; R6 represents a hydrogen atom, a hydroxyl group, an amino group or an acetylamino group; and *2 represents an asymmetric carbon atom when R6 is not a hydrogen atom, and to intermediates useful for the said processes. The processes of the present invention are convenient, practical preparing processes with low cost which comprise a small number of steps with good industrial work efficiency.
本发明涉及用于制备一种用于治疗糖尿病、肥胖、高脂血症等的化合物的过程,该化合物由以下式(1)表示:其中R1代表较低的烷基或苄基;*1代表不对称碳原子;R2代表氢原子、卤素原子或羟基;A代表以下一种基团:其中X代表NH、O或S;R6代表氢原子、羟基、氨基或乙酰氨基;*2代表不对称碳原子,当R6不是氢原子时,以及对所述过程有用的中间体。本发明的过程是方便、实用、成本低廉的制备过程,包括少量步骤和良好的工业工作效率。