申请人:Asahi Kasei Kabushiki Kaisha
公开号:EP1174425A1
公开(公告)日:2002-01-23
The present invention is directed to processes for the preparation of a compound useful for treating and preventing 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 represents a 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.
本发明涉及一种用于治疗和预防糖尿病、肥胖症、高脂血症等的化合物的制备工艺,该化合物由式(1)表示:
其中 R1 代表低级烷基或苄基;∗1 代表不对称碳原子;R2 代表氢原子、卤素原子或羟基;A 代表下列基团之一:
其中 X 代表 NH、O 或 S;R6 代表氢原子、羟基、氨基或乙酰氨基;当 R6 不是氢原子时,∗2 代表不对称碳原子。本发明的工艺是方便实用的制备工艺,成本低,步骤少,工业生产效率高。