[EN] PROCESS FOR THE PREPARATION OF 5-SUBSTITUTED ISOBENZOFURANS<br/>[FR] PROCEDE DE PREPARATION D'ISOBENZOFURANES SUBSTITUES EN POSITION 5
申请人:INFOSINT SA
公开号:WO2003011846A2
公开(公告)日:2003-02-13
There is described a process for the preparation of citalopram and of its pharmaceutically acceptable salts, which comprises treating a 1-[3-(dimethylamino)propyl]-1-(4-fluorophenyl)-1,3-dihydro-5-isobenzofurancarbaldoxime, O-substituted preferably with a diphenylmethyl or triphenylmethyl group, with formic-acetic anhydride. Furthermore, the total synthesis of citalopram, as free base or in form of its pharmaceutically acceptable salt, starting from 5-formylphthalide is described.
Process for the preparation of 5-subtituted isobenzofurans