[F:1][C:2]1[CH:16]=[CH:15][C:5]([C:6]([NH:8][CH:9]2[CH2:14][CH2:13][NH:12][CH2:11][CH2:10]2)=[O:7])=[CH:4][CH:3]=1.C(=O)([O-])[O-].[K+].[K+].Br[CH2:24][CH2:25][CH2:26][Cl:27].O>CN(C)C=O>[F:1][C:2]1[CH:16]=[CH:15][C:5]([C:6]([NH:8][CH:9]2[CH2:14][CH2:13][N:12]([CH2:24][CH2:25][CH2:26][Cl:27])[CH2:11][CH2:10]2)=[O:7])=[CH:4][CH:3]=1A mixture of 10.65 g of 4-(4-fluorobenzamido)piperidine (preparation 2) and potassium carbonate (9.93 g) in 160 ml of dry dimethylformamide was cooled to 0° C. and a solution of 1-bromo-3-chloropropane (5.68 ml) in 5.68 ml of dry dimethylformamide added dropwise thereto. After 3 hours at room temperature the reaction mixture was poured into 1600 ml of water and stirred for one hour. The solid which precipitated was recovered by filtration (7.1 g).
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