Novel pharmaceutically useful derivatives of selected known bio-affecting carboxylic acids and a process for preparing them are disclosed, said derivatives having the structural formula
wherein R,, R2, X and X' are e.g. hydrogen, or C1-C5 alkyl; and R-COO- is the acyloxy residue of:
(a) a monocarboxylic acid, e.g. indomethacin;
(b) a steroidal monocarboxylic acid;
(c) a cephalosporin antibiotic having one carboxylic acid function;
(d) a penicillin antibiotic having one carboxylic acid function; or
(e) y-aminobutyric acid, captopril or valproic acid; or having the structural formula
wherein -OOC-R'-COO- is the di(acyloxy) residue of:
(a) A cephalosporin antibiotic having two carboxylic acid functions;
(b) a penicillin antibiotic having two carboxylic acid functions; or
(c) the dicarboxylic acid, methotrexate.
Non-toxic pharmaceutically acceptable acid addition salts, N-oxides and quaternary ammonium salts of the compounds of formulas (I) and (II) are also disclosed.
本发明公开了某些已知
生物作用
羧酸的新型药用衍
生物及其制备方法,所述衍
生物的结构式为
其中 R、R2、X 和 X'例如为氢或 C1-C5 烷基;R-COO- 为下列物质的酰氧基残基
(a) 单
羧酸,如
吲哚美辛;
(b) 类
固醇单
羧酸;
(c) 具有一个
羧酸功能的
头孢菌素类抗生素;
(d) 具有一个
羧酸功能的
青霉素类抗生素;或
(e) y-
氨基
丁酸、
卡托普利或
丙戊酸;或具有以下结构式的抗生素
其中,-OOC-R'-COO- 是下列物质的二(酰氧基)残基
(a) 具有两个
羧酸功能的
头孢菌素类抗生素;
(b) 具有两个
羧酸官能团的
青霉素类抗生素;或
(c)
甲氨蝶呤二
羧酸。
此外,还公开了式(I)和式(II)化合物的无毒药学上可接受的酸加成盐、N-氧化物和季
铵盐。