[C:1]([C:4]1[CH:5]=[C:6]([Cl:22])[C:7]([CH2:19][C:20]#[N:21])=[C:8]([C:17]#[N:18])[C:9]=1[C:10]1[CH:15]=[CH:14][CH:13]=[C:12]([F:16])[CH:11]=1)(=O)[CH3:2].C([O-])(=O)C.[NH4+].C([BH3-])#[N:29].[Na+]>CO.C(#N)C>[NH2:29][CH:1]([C:4]1[CH:5]=[C:6]([Cl:22])[C:7]([CH2:19][C:20]#[N:21])=[C:8]([C:17]#[N:18])[C:9]=1[C:10]1[CH:15]=[CH:14][CH:13]=[C:12]([F:16])[CH:11]=1)[CH3:2]
A mixture of 6-acetyl-4-chloro-3-(cyanomethyl)-3′-fluorobiphenyl-2-carbonitrile (0.020 g, 0.064 mmol) and ammonium acetate (49 mg, 0.64 mmol) in methanol (0.4 mL) and acetonitrile (0.4 mL) was heated at 65° C. in a sealed tube for 30 min. The mixture was cooled to room temperature and sodium cyanoborohydride (8 mg, 0.13 mmol) was added. The reaction was heated at 65° C. for another 4 hours, cooled to room temperature, quenched with saturated sodium bicarbonate and extracted with dichloromethane. The combined extracts were dried over magnesium sulfate and evaporated to dryness. The residue was used directly in next step (20 mg, 100%). LCMS calculated for C17H14ClFN3 (M+H)+: m/z=314.1. found: 313.9.
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