Intermediates for the preparation of citalopram and escitalopram
申请人:Pittelkow Thomas
公开号:US20080058536A1
公开(公告)日:2008-03-06
Methods for manufacture of 5-alkoxycarbonylphthtalides are disclosed. The 5-alkoxycarbonylphthtalides are useful in syntheses of the well-known antidepresssants citalopram and escitalopram.
ANZALONE, L.;HIRSCH, J. A., J. ORG. CHEM., 1985, 50, N 12, 2128-2133
作者:ANZALONE, L.、HIRSCH, J. A.
DOI:——
日期:——
EP1611118A2
申请人:——
公开号:EP1611118A2
公开(公告)日:2006-01-04
US7687645B2
申请人:——
公开号:US7687645B2
公开(公告)日:2010-03-30
[EN] INTERMEDIATES FOR THE PREPARATION OF CITALOPRAM AND ESCITALOPRAM<br/>[FR] INTERMEDIAIRES SERVANT A LA PREPARATION DU CITALOPRAM ET DE L'ESCITALOPRAM
申请人:LUNDBECK & CO AS H
公开号:WO2004083197A2
公开(公告)日:2004-09-30
Methods for manufacture of 5-alkoxycarbonylphthtalides are disclosed. The 5-alkoxycarbonylphthtalides are useful in syntheses of the well-known antidepressants citalopram and escitalopram. A method for preparing an alkoxycarbonylphtalide of formula (III) comprising: (a) reacting a compound of formula (VIIIa) with a formaldehyde and oleum; and (b) addition of an alcohol R3-OH to the reaction of step (a); wherein X and Y of formula (VIIIa) may be selected independently from the group consisting of: OR1, OR2, a halogen (such as C1, Br, I), and NR; wherein R, R1 and R2 are independently h or a C1-6-alkyl or phenyl.