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.
本发明涉及一种新的中间体和过程,可用于制备某些抗
组胺哌啶衍
生物,该衍
生物的
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在承载R1和R2的碳原子之间形成第二个键; n是1到5的整数; m是0或1的整数; R3是-COOH或-COOalkyl,其中烷基具有1到6个碳原子,且为直链或支链; A的每个代表氢或羟基; 以及其药学上可接受的盐和单一光学异构体,但其中当R1和R2在承载R1和R2的碳原子之间形成第二个键或R1代表羟基时,m为0。