[EN] PROCESSES FOR PREPARING LEVOCETIRIZINE AND PHARMACEUTICALLY ACCEPTABLE SALTS THEREOF [FR] PROCÉDÉS DE PRÉPARATION DE LÉVOCÉTIRIZINE ET DE SES SELS PHARMACEUTIQUEMENT ACCEPTABLES
[EN] NOVEL PROCESS FOR THE SYNTHESIS OF ENANTIOMERICALLY PURE 2-METHOXY-5-[(2R)-2-(4-ALKYLPIPERAZIN-L-YL)PROPYL]-BENZENESULFONAMIDE<br/>[FR] NOUVEAU PROCÉDÉ DE SYNTHÈSE DE 2-MÉTHOXY-5-[(2R)-2-(4-ALKYLPIPÉRAZIN-L-YL)PROPYL]-BENZÈNESULFONAMIDE ÉNANTIOMÉRIQUEMENT PUR
申请人:HAVALDAR FREDDY H
公开号:WO2012101648A1
公开(公告)日:2012-08-02
Where R is C1-C3 alkyl, alkenyl A novel process for synthesis of compound of Formula 1 comprising steroselective catalytic reduction of compound of Formula IV under hydrogen gas pressure to obtain an intermediate compound of Formula II, which on coupling in presence of coupling agent and base in presence of organic solvent to obtain compound of Formula X, Formula X on reacting with deprotecting agent in presence of organic solvent results in formation of compound of Formula XI, condensation of Formula XI with alkyl halide results in formation of compound of Formula I.
PROCESS FOR PREPARATION OF SUBSTANTIALLY OPTICALLY PURE LEVOROTATORY AND DEXTROROTATORY ENANTIOMERS OF CETIRIZINE USING NOVEL INTERMEDIATES
申请人:Mohan Rao Dodda
公开号:US20090281318A1
公开(公告)日:2009-11-12
The present invention relates to a novel and commercially viable process for substantially optically pure levorotatory and dextrorotatory enantiomers of cetirizine intermediate, 1-[(4-chlorophenyl)phenylmethyl]piperazine, thereby producing substantially optically pure levorotatory and dextrorotatory enantiomers of cetirizine and their pharmaceutical acceptable acid addition salts thereof in high purity and in high yield using novel intermediates.
[EN] PROCESSES FOR PREPARING LEVOCETIRIZINE AND PHARMACEUTICALLY ACCEPTABLE SALTS THEREOF<br/>[FR] PROCÉDÉS DE PRÉPARATION DE LÉVOCÉTIRIZINE ET DE SES SELS PHARMACEUTIQUEMENT ACCEPTABLES
申请人:REDDYS LAB LTD DR
公开号:WO2009062036A3
公开(公告)日:2009-07-16
WO2008/152650
申请人:——
公开号:——
公开(公告)日:——
GRIGORYAN, L. A.;KALDRIKYAN, M. A.;PARONIKYAN, G. M.;AKOPYAN, L. G., ARM. XIM. ZH., 1983, 36, N 3, 177-181
作者:GRIGORYAN, L. A.、KALDRIKYAN, M. A.、PARONIKYAN, G. M.、AKOPYAN, L. G.