[EN] PROCESS FOR THE PURIFICATION OF MONTELUKAST BY THE PREPARATION OF ACID ADDITION SALTS AND PROCÉDÉ DE PURIFICATION DU MONTÉLUKAST PAR PRÉPARATION DE SELS D'ADDITION ACIDES ET DE SEL DE 20090813WO2005040123A1SYNHTON B V [NL], et al200505062410DX1-3,5,6,27,29DXWO2007012075A2REDDYS LAB LTD DR [IN], et al2007012546,7A1AEP1693368A1CHEMI SPA [IT]2006082311DA7DA [FR] PROCÉDÉ DE PURIFICATION DU MONTÉLUKAST PAR PRÉPARATION DE SELS D'ADDITION ACIDES ET DE SEL DE 20090813WO2005040123A1SYNHTON B V [NL], et al200505062410DX1-3,5,6,27,29DXWO2007012075A2REDDYS LAB LTD DR [IN], et al2007012546,7A1AEP1693368A1CHEMI SPA [IT]2006082311DA7DA
[EN] PROCESS FOR THE PURIFICATION OF MONTELUKAST BY THE PREPARATION OF ACID ADDITION SALTS AND PROCÉDÉ DE PURIFICATION DU MONTÉLUKAST PAR PRÉPARATION DE SELS D'ADDITION ACIDES ET DE SEL DE 20090813WO2005040123A1SYNHTON B V [NL], et al200505062410DX1-3,5,6,27,29DXWO2007012075A2REDDYS LAB LTD DR [IN], et al2007012546,7A1AEP1693368A1CHEMI SPA [IT]2006082311DA7DA<br/>[FR] PROCÉDÉ DE PURIFICATION DU MONTÉLUKAST PAR PRÉPARATION DE SELS D'ADDITION ACIDES ET DE SEL DE 20090813WO2005040123A1SYNHTON B V [NL], et al200505062410DX1-3,5,6,27,29DXWO2007012075A2REDDYS LAB LTD DR [IN], et al2007012546,7A1AEP1693368A1CHEMI SPA [IT]2006082311DA7DA
申请人:FARMAPROJECTS S A
公开号:WO2009098271A1
公开(公告)日:2009-08-13
The present invention relates to processes for the purification of montelukast by the preparation of acid addition salts and tert-amylamine salt. The preparation of acid addition salts is very efficient and does not lead to the increase of impurities arising from the dehydration of the tertiary alcohol, such as styrene impurity, while the use of tert-amylamine salt highly reduces the content of styrene impurity and montelukast sulfoxide.