Intermediates useful for the preparation of antihistaminic piperidine derivatives
申请人:Merrell Pharmaceuticals, Inc.
公开号:US06348597B2
公开(公告)日:2002-02-19
The present invention is related to a novel intermediates and processes which are useful in the preparation of certain antihistaminic piperidine derivatives of the formula
wherein
W represents —C(═O)— or —CH(OH)—;
R1 represents hydrogen or hydroxy;
R2 represents hydrogen;
R1 and R2 taken together form a second bond between the carbon atoms bearing R1 and R2;
n is an integer of from 1 to 5;
m is an integer 0 or 1;
R3 is —COOH or —COOalkyl wherein the alkyl moiety has from 1 to 6 carbon atoms and is straight or branched each of A is hydrogen or hydroxy; and pharmaceutically acceptable salts and individual optical isomers thereof,
with the proviso that where R1 and R2 are taken together to form a second bond between the carbon atoms bearing R1 and R2 or where R1 represented hydroxy, m is an integer 0.
本发明涉及一种新型中间体和过程,该中间体和过程在制备某些抗组胺酸哌啶衍生物的过程中非常有用,其化学式为
其中
W代表—C(═O)—或—CH(OH)—;
R1代表氢或羟基;
R2代表氢;
R1和R2一起形成连接R1和R2的碳原子之间的第二键;
n为1至5的整数;
m为0或1的整数;
R3为—COOH或—COO烷基,其中烷基基团具有1至6个碳原子,直链或支链,A的每个是氢或羟基;以及其药用可接受盐和各自的光学异构体,
但是当R1和R2一起形成连接R1和R2的碳原子之间的第二键或当R1代表羟基时,m为0。