[Cl-].[NH+]1C=CC=CC=1.C[O:9][C:10]1[CH:22]=[CH:21][CH:20]=[CH:19][C:11]=1[NH:12][C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1>Cl>[C:13]1([NH:12][C:11]2[CH:19]=[CH:20][CH:21]=[CH:22][C:10]=2[OH:9])[CH:14]=[CH:15][CH:16]=[CH:17][CH:18]=1A 1 L three neck flask was charged with pyridinium chloride (52.2 g, 452 mmol) and 2-methoxy-N-phenylaniline (9 g, 45.2 mmol). The reaction mixture was heated to 200° C. for 4 hours. The reaction mixture was poured into 5% HCl (200 mL) and extracted with EtOAc (3×300 mL). The organic portion was combined and purified by column chromatography (100% DCM) to yield the desired product. (6.5 g, 77%)
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