[CH3:1][C:2]1[CH:3]=[CH:4][C:5]([NH:8][C:9](=[O:19])[C:10]2[CH:15]=[CH:14][CH:13]=[CH:12][C:11]=2[N+:16]([O-])=O)=[N:6][CH:7]=1.CO.[BH4-].[Na+]>C1COCC1>[CH3:1][C:2]1[CH:3]=[CH:4][C:5]([NH:8][C:9](=[O:19])[C:10]2[CH:15]=[CH:14][CH:13]=[CH:12][C:11]=2[NH2:16])=[N:6][CH:7]=1To a stirring solution of N-(5-methylpyridin-2-yl)-2-nitrobenzamide (1.5 g, 5.8 mmol) and Ni(OAC)2.4H2O (2.9 g, 11.7 mmol) in THF (20 mL) and methanol (40 mL) at 0° C. was added, in small portions, sodium borohydride (0.88 g, 23.2 mmol). After complete addition and an additional 5 min, the solvent was evaporated in vacuo and the residue was partitioned between ethyl acetate (200 mL) and 50% conc NH4OH (200 mL). The organic phase was separated and washed again with 50% conc NH4OH, followed by brine, then dried with MgSO4, filtered and concentrated in vacuo to give 1.25 g (95%) of a light yellow solid.
Wird geladen…
