申请人:Takeda Chemical Industries, Ltd.
                            
                            
                                公开号:EP1211239A1
                            
                            
                                公开(公告)日:2002-06-05
                            
                            
As a process for preparing 2,3-dihydroazepine compounds at low cost in a simple and easy manner, there is provided a process for the preparation of compounds of the formula:
 or salts thereof, characterized in that compounds of the formula:
 or salts thereof are reacted with compounds of the formula:
 or salts thereof to give compounds of the formula:
 or salts thereof, which are then subjected to esterification and ring-closing reaction.
                            作为一种以简单易行的方式低成本制备 2,3-二氢氮杂卓化合物的工艺,提供了一种用于制备式:
 或其盐的制备工艺,其特征在于,式:
 或其盐与式:
 或其盐反应,得到式:
 或其盐,然后对其进行酯化和闭环反应。