4-Amino-1-naphthol hydrochloride → 4-(2-Chloropyridin-4-yloxy)naphthalen-1-amine

Participants

Reaction Steps

To a stirred solution of 2-chloro-4-fluoropyridine (1.26 g, 9.58 mmol) and 4-amino-1-naphthol hydrochloride (2a) (750 mg, 3.83 mmol) in NMP (40 mL), at −20° C., was added potassium tart-butoxide (1.290 g, 11.50 mmol). The reaction mixture was allowed to warm to RT and after 2.5 hr the reaction mixture was diluted with water (100 mL) and extracted with EtOAc (100 mL then 2×80 mL). The combined organic extracts were washed with brine (150 mL), dried and evaporated in vacuo. The crude product was subjected to SCX capture and release and the solvent was removed in vacuo to give the title compound (72) (1.02 g, 92%) as a brown solid: m/z 271 (M+H)+ (ES+).

Provenance & Evidence