[Cl:1][C:2]1[C:9]([F:10])=[CH:8][C:5]([CH:6]=O)=[C:4]([F:11])[CH:3]=1.[NH:12]1[CH2:17][CH2:16][O:15][CH2:14][CH2:13]1.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].C([O-])(O)=O.[Na+]>ClC(Cl)C>[Cl:1][C:2]1[C:9]([F:10])=[CH:8][C:5]([CH2:6][N:12]2[CH2:17][CH2:16][O:15][CH2:14][CH2:13]2)=[C:4]([F:11])[CH:3]=14-Chloro-2,5-difluorobenzaldehyde (1 g, 5.66 mmol), morpholine (0.490 ml, 5.66 mmol) and sodium triacetoxyborohydride (1.741 g, 8.21 mmol) were mixed in dichloroethane (17 ml). The mixture was stirred at ambient temperature under argon atmosphere for 3 days. NaHCO3 (aq., sat, 25 ml) was added. The mixture was extracted with dichloromethane (×3). The combined organic phase were dried over MgSO4 filtered and concentrated in vacuo to give 4-(4-chloro-2,5-difluorobenzyl)morpholine (0.600 g, 43%) as a liquid.
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