Methanol → 4-((4-Nitronaphthalen-1-yloxy)methyl)pyridin-3-amine

Participants

Reaction Steps

To a solution of (3-amino-pyridin-4-yl)-methanol (5) (4.00 g, 32.2 mmol) in anhydrous THF (160 mL) at 0° C. was added sodium hydride (1.55 g, 38.7 mmol, 60 wt %). After stirring for 20 min, 1-fluoro-4-nitronaphthalene (6.16 g, 32.2 mmol) was added, the ice bath removed and the reaction mixture left to warm to RT and stir for 12 hr. The reaction mixture was partitioned between EtOAc (200 mL) and saturated aq NaHCO3 solution (150 mL). The remaining yellow solid was collected by filtration and washed sequentially with water (50 mL), MeOH (50 mL) and diethyl ether (100 mL) and was identified as the desired product by LC-MS and 1H NMR. The filtrate was returned to a separating funnel; the organic phase was collected and washed with brine (100 mL), dried and concentrated in vacuo to afford an orange residue. Trituration of the orange residue with MeOH (200 mL) afforded an orange solid which was washed with diethyl ether (200 mL). LC-MS and 1H NMR analysis of the orange solid were identical to that observed for the insoluble solid obtained earlier. The two products were combined to afford 4-((4-nitronaphthalen-1-yloxy)methyl)pyridin-3-amine (6) (7.80 g, 77%): m/z 296 (M+H)+ (ES+).

Provenance & Evidence