Sodium Hydroxide → HCID 117696455, compound

Participants

Reaction Conditions

Reaction Steps

4,6-Dimethyl-[1,7]naphthyridin-8-ol (1.26 g, 7.23 mmol) and phosphorus oxychloride (6.7 mL, 72 mmol) in toluene (18 mL) are heated at 100° C. overnight. Phosphorus oxychloride (20 mL, 215 mmol) is added and the reaction mixture is heated at 104° C. for 1 d. The reaction mixture is cooled to RT and poured in a mixture of ice and water under stirring. After 30 min 20% NaOH is added until pH 6-7. The aqueous layer is extracted with DCM and the combined organic layers are washed with brine, dried and evaporated under reduce pressure to give a residue that is purified by flash chromatography (eluent 0-50% EtOAc/cyclohexane) to furnish 8-chloro-4,6-dimethyl-[1,7]naphthyridine (920 mg, 66%).

Provenance & Evidence