C[O:2][C:3]1[CH:4]=[C:5]([C:9]2[CH:14]=[CH:13][CH:12]=[CH:11][N:10]=2)[CH:6]=[CH:7][CH:8]=1.Cl.N1C=CC=CC=1.[OH-].[Na+]>O>[N:10]1[CH:11]=[CH:12][CH:13]=[CH:14][C:9]=1[C:5]1[CH:4]=[C:3]([OH:2])[CH:8]=[CH:7][CH:6]=1To a 500 mL round bottom flask was added 2-(3-methoxyphenyl)pyridine (21.3 g, 115 mmol) and pyridine hydrochloride (107.5 g, 930 mmol). The reaction mixture was heated to 190° C. for 8 hours under nitrogen. The reaction mixture was cooled slightly and water was added. The mixture was stirred overnight. The pH of the solution was adjusted to 7 with 10% sodium hydroxide solution, extracted three times with dichloromethane. The organic layers were washed with 10% LiCl solution, brine, dried over magnesium sulfate, filtered, and evaporated. The residue was distilled on a Kugelrohr to remove the remaining pyridine (18 g, 91%).
Wird geladen…
