申请人:Ohgen Research Laboratories Ltd.
公开号:EP2399899A1
公开(公告)日:2011-12-28
This invention provides compounds having excellent antitumor activity which are represented by the following formula (I-2):
in which
R2 stands for a residual group remaining after removing all carboxyl groups present in a carboxylic acid selected from the group consisting of malic acid, citric acid, succinic acid, fumaric acid, 2-oxoglutaric acid, pyruvic acid, p-pyruvoaminobenzoic acid, retinoic acid, tyrosine, cysteine, glutamic acid and serine, and where hydroxyl or amino group(s) are present in the residual group, they may optionally be protected by acyl (e.g., lower alkanoyl) or benzyloxycarbonyl group(s),
m is 1, 2 or 3,
n is 0, 1 or 2,
m + n showing the number of carboxyl groups which are present in said carboxylic acid.
本发明提供了具有优异抗肿瘤活性的化合物,它们由下式(I-2)表示:
其中
R2代表除去羧酸中所有羧基后剩余的残基,羧酸选自苹果酸、柠檬酸、琥珀酸、富马酸、2-氧代戊二酸、丙酮酸、对丙酮氨基苯甲酸、维甲酸、酪氨酸、半胱氨酸、谷氨酸和丝氨酸,残基中存在羟基或氨基时,可选择用酰基(如、当残余基团中存在羟基或氨基时,它们可任选被酰基(如低级烷酰基)或苄氧羰基保护、)
m 为 1、2 或 3、
n 为 0、1 或 2、
m + n 表示存在于所述羧酸中的羧基的数目。