Stannous Chloride → 5-((2-(4-(1-Methylpiperidin-4-yl)phenyl)pyridin-4-yl)oxy)pyridin-2-amine

Participants

Reaction Conditions

Reaction Steps

A solution of 2-(4-(1-methylpiperidin-4-yl)phenyl)-4-((6-nitropyridin-3-yl)oxy)pyridine (0.199 g, 0.510 mmol) in EtOAc (10 mL) and EtOH (10 mL) was treated with tin(II) chloride dehydrate (0.575 g, 2.55 mmol), heated at 65° C. for 4 h, then heated 75° C. overnight. Additional tin(II) chloride dehydrate (300 mg) was added, the mixture heated at 80° C. for 6 h, treated with another portion of tin(II) chloride dehydrate (300 mg) and heated at 80° C. for 3 days. Additional tin(II) chloride dehydrate (300 mg) was added and the mixture heated at 80° C. overnight. The mixture was cooled to RT, concentrated to dryness, treated with EtOAc and satd. NaHCO3, filtered through diatomaceous earth and the filter cake rinsed with EtOAc/THF. The filtrate was treated with solid NaOH (2 g) and NaCl until the aqueous layer was saturated, extracted with 3:1 EtOAc/THF (2×) and the combined organics were washed with brine, dried over Na2SO4 and concentrated to dryness to afford 5-((2-(4-(1-methylpiperidin-4-yl)phenyl)pyridin-4-yl)oxy)pyridin-2-amine (250 mg, >100%). MS (ESI) m/z: 361.2 (M+H+).

Provenance & Evidence