3-bromo-N-methylbenzamide

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 3-bromo-N-methylbenzamide (3.48 g, 16.25 mmol) in dry tetrahydrofuran (100 ml) was cooled to −78° C. and treated dropwise over 10 min. with 13 ml (32.5 mmol) of a 2.5 M solution of n-butyllithium in hexane. After 15 min. at −78° C., a solution of 4-fluorobenzaldehyde (2.5 g, 20.1 mmol) in tetrahydrofuran (10 ml) was added dropwise over 10 min. and the resulting mixture was stirred for another 45 min at the same temperature. The temperature was then allowed to reach −20° C. and the mixture was quenched by the addition of saturated ammonium chloride. The reaction mixture was then extracted with ethyl acetate and the organic layer was washed with 0.1N hydrochloric acid, saturated sodium bicarbonate, brine and dried (magnesium sulfate). Evaporation of the solvent and crystallization of the residue from ethyl acetate gave 1.60 g (38%) of the title compound as a white solid: mp: 138-139° C. 1HNMR 400 MHz (CDCl3) δ (ppm): 3.0 and 3.01 (3H, 2 s, NCH3), 5.88 (1H, s, CH), 6.19 (1H, broad, NH), 7.03 (2H, m, aromatics), 7.36 (2H, m, aromatics), 7.41 (1H, t, J=7.6 Hz, aromatic), 7.49 (1H, d, J=7.6 Hz, aromatic), 7.66 (1H, d, J=7.6 Hz, aromatic), 7.79 (1H, s, aromatic). Anal. Calcd for C15H14FNO2: C, 69.49; H, 5.44; N, 5.40. Found: C, 69.41; H, 5.41; N, 5.63. to reach −20° C. the mixture was quenched by the addition of saturated ammonium chloride The reaction mixture was then extracted with ethyl acetate the organic layer was washed with 0.1N hydrochloric acid, saturated sodium bicarbonate, brine dried (magnesium sulfate) Evaporation of the solvent and crystallization of the residue from ethyl acetate

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:-78.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 3-bromo-N-methylbenzamide (16.0 g) in THF (180 ml) was slowly added dropwise a solution (1.6 M; 103 ml) of n-butyllithium in hexane at −78° C., and the mixture was stirred at −78° C. for 20 min. Trimethoxyborane (50.2 ml) was added dropwise at −78° C. and the mixture was stirred at −78° C. for 30 min and at room temperature for 17 h. 2N Hydrochloric acid (82.0 ml) was added to the reaction mixture, and after stirring for 1 h, the reaction mixture was extracted with ethyl acetate, the organic layer was washed with saturated brine and dried. The solvent was evaporated under reduced pressure to give a crude product (22.5 g) of 3-[(methylamino)carbonyl]phenylboronic acid as a pale-yellow oil. By the reaction in the same manner as in Example 29-(i) using this product (19.2 g), (4-bromophenyl)(1-trityl-1H-imidazol-4-yl)methanone (10.0 g), 2M aqueous sodium carbonate solution (81.2 ml) and tetrakis(triphenylphosphine)palladium(0) (1.17 g), the title compound (6.89 g) was obtained as colorless powder crystals. the mixture was stirred at −78° C. for 30 min and at room temperature for 17 h after stirring for 1 h the reaction mixture was extracted with ethyl acetate the organic layer was washed with saturated brine dried The solvent was evaporated under reduced pressure to give a crude product (22.5 g) of 3-[(methylamino)carbonyl]phenylboronic acid as a pale-yellow oil

Conditions: temp:-78.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 3-bromo-N-methylbenzamide (16.0 g) in THF (180 ml) was slowly added dropwise a solution (1.6 M; 103 ml) of n-butyllithium in hexane at −78° C., and the mixture was stirred at −78° C. for 20 min. Trimethoxyborane (50.2 ml) was added dropwise at −78° C. and the mixture was stirred at −78° C. for 30 min and at room temperature for 17 h. 2N Hydrochloric acid (82.0 ml) was added to the reaction mixture, and after stirring for 1 h, the reaction mixture was extracted with ethyl acetate, the organic layer was washed with saturated brine and dried. The solvent was evaporated under reduced pressure to give a crude product (22.5 g) of 3-[(methylamino)carbonyl]phenylboronic acid as a pale-yellow oil. By the reaction in the same manner as in Example 29-(i) using this product (19.2 g), (4-bromophenyl)(1-trityl-1H-imidazol-4-yl)methanone (10.0 g), 2M aqueous sodium carbonate solution (81.2 ml) and tetrakis(triphenylphosphine)palladium(0) (1.17 g), the title compound (6.89 g) was obtained as colorless powder crystals. the mixture was stirred at −78° C. for 30 min and at room temperature for 17 h after stirring for 1 h the reaction mixture was extracted with ethyl acetate the organic layer was washed with saturated brine dried The solvent was evaporated under reduced pressure to give a crude product (22.5 g) of 3-[(methylamino)carbonyl]phenylboronic acid as a pale-yellow oil

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: By the reaction in the same manner as in Example 33-(ii) using 4-[1-hydroxy-2-methyl-1-(1-trityl-1H-imidazol-4-yl)propyl]phenylboronic acid (3.44 g), 3-bromo-N-methylbenzamide (1.10 g) and tetrakis(triphenylphosphine)palladium(0) (0.21 g), the title compound (1.00 g) was obtained as a pale-yellow amorphous powder.

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 3-bromo-N-methylbenzamide (3.48 g, 16.25 mmol) in dry tetrahydrofuran (100 ml) was cooled to −78° C. and treated dropwise over 10 min. with 13 ml (32.5 mmol) of a 2.5 M solution of n-butyllithium in hexane. After 15 min. at −78° C., a solution of 4-fluorobenzaldehyde (2.5 g, 20.1 mmol) in tetrahydrofuran (10 ml) was added dropwise over 10 min. and the resulting mixture was stirred for another 45 min at the same temperature. The temperature was then allowed to reach −20° C. and the mixture was quenched by the addition of saturated ammonium chloride. The reaction mixture was then extracted with ethyl acetate and the organic layer was washed with 0.1N hydrochloric acid, saturated sodium bicarbonate, brine and dried (magnesium sulfate). Evaporation of the solvent and crystallization of the residue from ethyl acetate gave 1.60 g (38%) of the title compound as a white solid: mp: 138-139° C. 1HNMR 400 MHz (CDCl3) δ (ppm): 3.0 and 3.01 (3H, 2 s, NCH3), 5.88 (1H, s, CH), 6.19 (1H, broad, NH), 7.03 (2H, m, aromatics), 7.36 (2H, m, aromatics), 7.41 (1H, t, J=7.6 Hz, aromatic), 7.49 (1H, d, J=7.6 Hz, aromatic), 7.66 (1H, d, J=7.6 Hz, aromatic), 7.79 (1H, s, aromatic). Anal. Calcd for C15H14FNO2: C, 69.49; H, 5.44; N, 5.40. Found: C, 69.41; H, 5.41; N, 5.63. to reach −20° C. the mixture was quenched by the addition of saturated ammonium chloride The reaction mixture was then extracted with ethyl acetate the organic layer was washed with 0.1N hydrochloric acid, saturated sodium bicarbonate, brine dried (magnesium sulfate) Evaporation of the solvent and crystallization of the residue from ethyl acetate

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A solution of 3-bromo-N-methylbenzamide (3.48 g, 16.25 mmol) in dry tetrahydrofuran (100 ml) was cooled to −78° C. and treated dropwise over 10 min. with 13 ml (32.5 mmol) of a 2.5 M solution of n-butyllithium in hexane. After 15 min. at −78° C., a solution of 4-fluorobenzaldehyde (2.5 g, 20.1 mmol) in tetrahydrofuran (10 ml) was added dropwise over 10 min. and the resulting mixture was stirred for another 45 min at the same temperature. The temperature was then allowed to reach −20° C. and the mixture was quenched by the addition of saturated ammonium chloride. The reaction mixture was then extracted with ethyl acetate and the organic layer was washed with 0.1N hydrochloric acid, saturated sodium bicarbonate, brine and dried (magnesium sulfate). Evaporation of the solvent and crystallization of the residue from ethyl acetate gave 1.60 g (38%) of the title compound as a white solid: mp: 138-139° C. 1HNMR 400 MHz (CDCl3) δ (ppm): 3.0 and 3.01 (3H, 2 s, NCH3), 5.88 (1H, s, CH), 6.19 (1H, broad, NH), 7.03 (2H, m, aromatics), 7.36 (2H, m, aromatics), 7.41 (1H, t, J=7.6 Hz, aromatic), 7.49 (1H, d, J=7.6 Hz, aromatic), 7.66 (1H, d, J=7.6 Hz, aromatic), 7.79 (1H, s, aromatic). Anal. Calcd for C15H14FNO2: C, 69.49; H, 5.44; N, 5.40. Found: C, 69.41; H, 5.41; N, 5.63. to reach −20° C. the mixture was quenched by the addition of saturated ammonium chloride The reaction mixture was then extracted with ethyl acetate the organic layer was washed with 0.1N hydrochloric acid, saturated sodium bicarbonate, brine dried (magnesium sulfate) Evaporation of the solvent and crystallization of the residue from ethyl acetate

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:-78.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a solution of 3-bromo-N-methylbenzamide (16.0 g) in THF (180 ml) was slowly added dropwise a solution (1.6 M; 103 ml) of n-butyllithium in hexane at −78° C., and the mixture was stirred at −78° C. for 20 min. Trimethoxyborane (50.2 ml) was added dropwise at −78° C. and the mixture was stirred at −78° C. for 30 min and at room temperature for 17 h. 2N Hydrochloric acid (82.0 ml) was added to the reaction mixture, and after stirring for 1 h, the reaction mixture was extracted with ethyl acetate, the organic layer was washed with saturated brine and dried. The solvent was evaporated under reduced pressure to give a crude product (22.5 g) of 3-[(methylamino)carbonyl]phenylboronic acid as a pale-yellow oil. By the reaction in the same manner as in Example 29-(i) using this product (19.2 g), (4-bromophenyl)(1-trityl-1H-imidazol-4-yl)methanone (10.0 g), 2M aqueous sodium carbonate solution (81.2 ml) and tetrakis(triphenylphosphine)palladium(0) (1.17 g), the title compound (6.89 g) was obtained as colorless powder crystals. the mixture was stirred at −78° C. for 30 min and at room temperature for 17 h after stirring for 1 h the reaction mixture was extracted with ethyl acetate the organic layer was washed with saturated brine dried The solvent was evaporated under reduced pressure to give a crude product (22.5 g) of 3-[(methylamino)carbonyl]phenylboronic acid as a pale-yellow oil

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: By the reaction in the same manner as in Example 33-(ii) using 4-[1-hydroxy-2-methyl-1-(1-trityl-1H-imidazol-4-yl)propyl]phenylboronic acid (3.44 g), 3-bromo-N-methylbenzamide (1.10 g) and tetrakis(triphenylphosphine)palladium(0) (0.21 g), the title compound (1.00 g) was obtained as a pale-yellow amorphous powder.