| 摘要 |
The invention relates to a method for the preparation of citalopram comprising reaction of a compound of formula II with a compound having the formula wherein R is halogen or -O-SO2-X, wherein X is alkyl, alkenyl, alkynyl or optionally alkyl substituted aryl or aralkyl, and R1 is dimethylamino, halogen, -O-SO2-X wherein X is as defined above, provided that R is not halogen when R1 is dimethylamino; and if R1 is dimethylamino followed by isolation of citalopram base or a pharmaceutically acceptable acid addition salt thereof, and if R1 is halogen or -O-SO2-X, wherein X is as defined above, followed by conversion of the resulting compound of formula wherein R2 is halogen or a group of formula -O-SO2-X wherein X is as defined above to citalopram, followed by isolation of citalopram base or a pharmaceutically acceptable acid addition salt thereof. |
