1,1'-Carbonyldiimidazole → 3-(4-Bromo-phenyl)-N-methoxy-N-methyl-3-o-tolyl-propionamide

関与物質

反応手順

To a suspension of 3-(4-bromophenyl)-3-o-tolylpropanoic acid (125.5 g, 393 mmol) in dichloromethane (600 mL) was added 1,1′-carbonyldiimidazole (79.7 g, 491 mmol) portionwise over 5 min. After gas evolution had ceased N,O-dimethylhydroxylamine hydrochloride (42.2 g, 432 mmol) was added in portions over 5 min. The reaction mixture was stirred for 17 h at room temperature, then washed with water. The organic layer was washed with brine, dried over magnesium sulfate, filtered, and evaporated. The crude product was chromatographed (SiO2; heptane/ethyl acetate 3:1) and the product triturated with heptane to produce the title compound (127 g, 88%). White solid, MS: 362.1 [M+H]+.

情報源と証拠