申请人:Nishitani Shinji
公开号:US20070249835A1
公开(公告)日:2007-10-25
The invention provides an improved process for preparing rebamipide that is useful as a medicament, which makes it possible to prepare rebamipide with high purity and high yield. The invention is an improved process for preparing rebamipide of the formula (1), comprising subjecting a carbostyril amino acid compound of the formula (5) or a salt thereof containing a compound of the formula (11) as an impurity to a reduction treatment in the presence of hydrogen and a catalyst in a basic aqueous solution, thereby selectively reducing the impurity compound (11) to transform into the carbostyril amino acid compound (5); and then acylating the compound (5) in a basic aqueous solution to give rebamipide (1).
本发明提供了一种改进的制备rebamipide的方法,该方法用作药物,使得能够高纯度和高产率地制备rebamipide。本发明是一种改进的制备式(1)的rebamipide的方法,包括在碱性水溶液中,在氢气和催化剂的存在下,将式(5)的carbostyril氨基酸化合物或其含有式(11)化合物作为杂质的盐经过还原处理,从而选择性地还原杂质化合物(11)转化为carbostyril氨基酸化合物(5);然后在碱性水溶液中酰化化合物(5)以得到rebamipide(1)。