2-bromo-N-(2,4,6-trimethylphenyl)acetamide

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a stirred solution of 2,4,6-trimethylaniline (1 g, 7.40 mmol) in methylene chloride (25 mL) at -50° C. was added successively N,N-diisopropylethylamine (1.58 mL, 8.14 mmol, 1.1 eq) and bromoacetyl bromide (0.72 mL, 7.40 mmol, 1 eq) such that the temperature did not exceed -40° C. On completion of the addition, the cooling bath was removed, and the reaction mixture was allowed to warm to room temperature. After stirring for a further 30 minutes, the mixture was diluted with ether (70 mL) and poured into 1N sodium bisulfate solution. The phases were separated, and the upper layer was washed successively with water and brine. The organic phase was dried (Na2SO4) and the solvent evaporated to half volume, at which point the product crystallized. The crystals were removed by vacuum filtration to afford the title compound (1.51 g, 80%). did not exceed -40° C On completion of the addition the cooling bath was removed the mixture was diluted with ether (70 mL) poured into 1N sodium bisulfate solution The phases were separated the upper layer was washed successively with water and brine The organic phase was dried (Na2SO4) the solvent evaporated to half volume, at which point the product crystallized The crystals were removed by vacuum filtration

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 2-bromo-5-trifluoromethyl-3H-imidazole-4-carboxylic acid ethyl ester (3.00 g, 10.45 mmol) and 2-bromo-N-(2,4,6-trimethyl-phenyl)-acetamide (2.94 g, 11.50 mmol) in a mixture of toluene (16 mL) and acetone (8 mL) was added DBU (1.72 mL, 11.50 mmol). The resulting solution was stirred at room temperature for 5 days. Methanol (10 mL) was added to dissolve the precipitate formed, followed by the addition of silica gel (25 g). The solvent was removed under reduced pressure to dryness and the residue was applied to a silica gel-packed column. The isolation of the product was achieved by column chromatography (hexanes-ethyl acetate 4:1). Yield—4.25 g (88%). LC/MS: tR=1.62 min., MS: [M+H]=462. to dissolve the precipitate formed followed by the addition of silica gel (25 g) The solvent was removed under reduced pressure to dryness

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 2-bromo-5-methyl-3H-imidazole-4-carboxylic acid ethyl ester (1.00 g, 4.291 mmol) and 2-bromo-N-(2,4,6-trimethyl-phenyl)-acetamide (1.209 g, 4.720 mmol) in a mixture of toluene (16 mL) and acetone (8 mL) was added diazabicycloundecene (0.71 mL, 4.720 mmol). The resulting solution was stirred at room temperature for 24 h. Methanol (10 mL) was added to dissolve the precipitate formed, followed by the addition of silica gel (25 g). The solvent was removed under reduced pressure to dryness and the residue was applied to a silica gel-packed column. The isolation of the product was achieved by column chromatography (hexanes—ethyl acetate 4:1 to 1:2). Yield—0.736 g (42%). 1H NMR (DMSO d-6, 500 MHz) δ 9.52 (s, 1H), 6.86 (s, 2H), 5.15 (br s, 2H), 4.25 (q, J=7.1 Hz, 2H), 2.38 (s, 3H), 2.21 (s, 3H), 2.11 (s, 6H), 1.30 (t, J=7.1 Hz, 3H); LC/MS: tR=1.46 min., MS: [M+H]=408. to dissolve the precipitate formed followed by the addition of silica gel (25 g) The solvent was removed under reduced pressure to dryness

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 2-bromo-5-trifluoromethyl-3H-imidazole-4-carboxylic acid ethyl ester (3.00 g, 10.45 mmol) and 2-bromo-N-(2,4,6-trimethyl-phenyl)-acetamide (2.94 g, 11.50 mmol) in a mixture of toluene (16 mL) and acetone (8 mL) was added DBU (1.72 mL, 11.50 mmol). The resulting solution was stirred at room temperature for 5 days. Methanol (10 mL) was added to dissolve the precipitate formed, followed by the addition of silica gel (25 g). The solvent was removed under reduced pressure to dryness and the residue was applied to a silica gel-packed column. The isolation of the product was achieved by column chromatography (hexanes-ethyl acetate 4:1). Yield—4.25 g (88%). LC/MS: tR=1.62 min., MS: [M+H]=462. to dissolve the precipitate formed followed by the addition of silica gel (25 g) The solvent was removed under reduced pressure to dryness

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 2-bromo-5-methyl-3H-imidazole-4-carboxylic acid ethyl ester (1.00 g, 4.291 mmol) and 2-bromo-N-(2,4,6-trimethyl-phenyl)-acetamide (1.209 g, 4.720 mmol) in a mixture of toluene (16 mL) and acetone (8 mL) was added diazabicycloundecene (0.71 mL, 4.720 mmol). The resulting solution was stirred at room temperature for 24 h. Methanol (10 mL) was added to dissolve the precipitate formed, followed by the addition of silica gel (25 g). The solvent was removed under reduced pressure to dryness and the residue was applied to a silica gel-packed column. The isolation of the product was achieved by column chromatography (hexanes-ethyl acetate 4:1 to 1:2). Yield—0.736 g (42%). 1H NMR (DMSO d-6, 500 MHz) δ 9.52 (s, 1H), 6.86 (s, 2H), 5.15 (br s, 2H), 4.25 (q, J=7.1 Hz, 2H), 2.38 (s, 3H), 2.21 (s, 3H), 2.11 (s, 6H), 1.30 (t, J=7.1 Hz, 3H); LC/MS: tR=1.46 min., MS: [M+H]=408. to dissolve the precipitate formed followed by the addition of silica gel (25 g) The solvent was removed under reduced pressure to dryness

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 2-bromo-5-trifluoromethyl-3H-imidazole-4-carboxylic acid ethyl ester (3.00 g, 10.45 mmol) and 2-bromo-N-(2,4,6-trimethyl-phenyl)-acetamide (2.94 g, 11.50 mmol) in a mixture of toluene (16 mL) and acetone (8 mL) was added DBU (1.72 mL, 11.50 mmol). The resulting solution was stirred at room temperature for 5 days. Methanol (10 mL) was added to dissolve the precipitate formed, followed by the addition of silica gel (25 g). The solvent was removed under reduced pressure to dryness and the residue was applied to a silica gel-packed column. The isolation of the product was achieved by column chromatography (hexanes-ethyl acetate 4:1). Yield—4.25 g (88%). LC/MS: tR=1.62 min., MS: [M+H]=462. to dissolve the precipitate formed followed by the addition of silica gel (25 g) The solvent was removed under reduced pressure to dryness

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 2-bromo-5-methyl-3H-imidazole-4-carboxylic acid ethyl ester (1.00 g, 4.291 mmol) and 2-bromo-N-(2,4,6-trimethyl-phenyl)-acetamide (1.209 g, 4.720 mmol) in a mixture of toluene (16 mL) and acetone (8 mL) was added diazabicycloundecene (0.71 mL, 4.720 mmol). The resulting solution was stirred at room temperature for 24 h. Methanol (10 mL) was added to dissolve the precipitate formed, followed by the addition of silica gel (25 g). The solvent was removed under reduced pressure to dryness and the residue was applied to a silica gel-packed column. The isolation of the product was achieved by column chromatography (hexanes-ethyl acetate 4:1 to 1:2). Yield—0.736 g (42%). 1H NMR (DMSO d-6, 500 MHz) δ 9.52 (s, 1H), 6.86 (s, 2H), 5.15 (br s, 2H), 4.25 (q, J=7.1 Hz, 2H), 2.38 (s, 3H), 2.21 (s, 3H), 2.11 (s, 6H), 1.30 (t, J=7.1 Hz, 3H); LC/MS: tR=1.46 min., MS: [M+H]=408. to dissolve the precipitate formed followed by the addition of silica gel (25 g) The solvent was removed under reduced pressure to dryness

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 2-bromo-5-trifluoromethyl-3H-imidazole-4-carboxylic acid ethyl ester (3.00 g, 10.45 mmol) and 2-bromo-N-(2,4,6-trimethyl-phenyl)-acetamide (2.94 g, 11.50 mmol) in a mixture of toluene (16 mL) and acetone (8 mL) was added DBU (1.72 mL, 11.50 mmol). The resulting solution was stirred at room temperature for 5 days. Methanol (10 mL) was added to dissolve the precipitate formed, followed by the addition of silica gel (25 g). The solvent was removed under reduced pressure to dryness and the residue was applied to a silica gel-packed column. The isolation of the product was achieved by column chromatography (hexanes-ethyl acetate 4:1). Yield—4.25 g (88%). LC/MS: tR=1.62 min., MS: [M+H]=462. to dissolve the precipitate formed followed by the addition of silica gel (25 g) The solvent was removed under reduced pressure to dryness

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: To a solution of 2-bromo-5-methyl-3H-imidazole-4-carboxylic acid ethyl ester (1.00 g, 4.291 mmol) and 2-bromo-N-(2,4,6-trimethyl-phenyl)-acetamide (1.209 g, 4.720 mmol) in a mixture of toluene (16 mL) and acetone (8 mL) was added diazabicycloundecene (0.71 mL, 4.720 mmol). The resulting solution was stirred at room temperature for 24 h. Methanol (10 mL) was added to dissolve the precipitate formed, followed by the addition of silica gel (25 g). The solvent was removed under reduced pressure to dryness and the residue was applied to a silica gel-packed column. The isolation of the product was achieved by column chromatography (hexanes-ethyl acetate 4:1 to 1:2). Yield—0.736 g (42%). 1H NMR (DMSO d-6, 500 MHz) δ 9.52 (s, 1H), 6.86 (s, 2H), 5.15 (br s, 2H), 4.25 (q, J=7.1 Hz, 2H), 2.38 (s, 3H), 2.21 (s, 3H), 2.11 (s, 6H), 1.30 (t, J=7.1 Hz, 3H); LC/MS: tR=1.46 min., MS: [M+H]=408. to dissolve the precipitate formed followed by the addition of silica gel (25 g) The solvent was removed under reduced pressure to dryness