申请人:——
公开号:US20030166682A1
公开(公告)日:2003-09-04
An improved process for the manufacture of fexofenadine is described in which a compound of formula (F): wherein R
2
represents COOH, COO—C
1-6
alkyl or CN; and R
3
represents hydrogen, mesylate, triflate, tosylate or carboxy-C
1-6
-alkyl, or a salt thereof is prepared by: (I) reacting a compound of formula (B): wherein R1 represents hydrogen or carboxy-C
1-6
-alkyl; and R
2
is a hereinbefore defined, with a copper and/or silver compound in the presence of palladium or a compound thereof to yield a compound of formula (C): wherein R
1
, and R
2
are as hereinbefore defined; (II) converting said compound of formula (C) into a compound of formula (E): wherein R
2
and R
3
are as hereinbefore defined and R
4
represents a halogen atom, and (III) reacting said compound of formula (E) with azacyclonol.
本发明描述了一种改进的费索芬丁制造工艺,其中通过以下步骤制备式(F)的化合物:其中R2代表COOH,COO-C1-6烷基或CN;R3代表氢、甲磺酸盐、三氟甲磺酸盐、对甲苯磺酸盐或羧基-C1-6-烷基,或其盐:(I)将式(B)的化合物与铜和/或银化合物在钯或其化合物的存在下反应,以产生式(C)的化合物:其中R1和R2如上所述;(II)将式(C)的化合物转化为式(E)的化合物:其中R2和R3如上所述,R4代表卤素原子;(III)将式(E)的化合物与氮杂环己烷反应。