4-Methylmorpholine → 2-(4'-Bromobiphenyl-4-yl)-N-methoxy-N-methylacetamide

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Reaction Steps

(4′-Bromobiphenyl-4-yl)acetic acid (12 g, 37 mmol) was dissolved in a mixed solvent of tetrahydrofuran (200 mL) and methanol (200 mL), and N,O-dimethylhydroxylamine hydrochloride (5.4 g, 56 mmol), 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholinium chloride (15 g, 60 mmol) and N-methylmorpholine (6.1 mL, 56 mmol) were added, followed by stirring at room temperature for 1 hour. After the reaction solution was concentrated under reduced pressure, ethyl acetate was added to the resulting residue, and the organic layer was washed with water. After the solvent was distilled off under reduced pressure, the resulting residue was purified by chromatography on a silica gel column (Moritex Corporation, elution solvent: hexane/ethyl acetate), and a fraction corresponding to the Rf value=0.45 (hexane/ethyl acetate=1/1) by thin layer chromatography was concentrated under reduced pressure to afford the title compound (12 g, 37 mmol) as a white solid (yield 100%).

Provenance & Evidence