The present invention is related to novel intermediates and processes which are useful in the preparation of certain antihistaminic piperidine derivatives of formula (I) 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制备某些抗
组胺哌啶衍
生物的方法,其
化学式为(I),其中W代表-C(=O)-或-CH(OH)-;R1代表氢或羟基;R2代表氢;R1和R2一起形成连接带有R1和R2的碳原子之间的第二个键;n为1至5的整数;m为0或1的整数;R3为-COOH或-COOalkyl,其中烷基具有1至6个碳原子,是直链或支链;每个A是氢或羟基;以及其药学上可接受的盐和单一光学异构体,但当R1和R2一起形成连接带有R1和R2的碳原子之间的第二个键或当R1代表羟基时,m为0。