2-(4-溴-3-甲基苯基)乙氰

反应条件: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a stirred solution of 2-(4-bromo-3-methylphenyl)acetonitrile (11.2 g, 53.3 mmol) in anhydrous DMF (125 mL) is added methyl iodide (13.2 mL, 213 mmol). The solution is cooled to 0° C. and sodium hydride (60% susp. in oil, 3.84 g, 160 mmol) is added in small portions over 20 min. The reaction mixture is then left stirring and slowly warmed up to room temperature for 18 h. At 0° C., water (500 mL) is then slowly added then extracted with ethyl acetate containing 10% of hexanes. The organic layer is separated, dried with MgSO4, filtered and concentrated under reduced pressure to provide the expected product 2-(4-bromo-3-methylphenyl)-2-methylpropanenitrile (12.6 g, 99%) as a clear yellow oil which is used in the next step without further purification. 1H NMR (400 MHz, CHLOROFORM-D) δ ppm 1.71 (s, 6H) 2.43 (s, 3H) 7.14 (dd, J=8.40, 2.34 Hz, 1H) 7.34 (d, J=2.54 Hz, 1H) 7.53 (d, J=8.40 Hz, 1H) The reaction mixture is then left slowly warmed up to room temperature for 18 h then extracted with ethyl acetate containing 10% of hexanes The organic layer is separated dried with MgSO4 filtered concentrated under reduced pressure

反应条件: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a stirred solution of 2-(4-bromo-3-methylphenyl)acetonitrile (11.2 g, 53.3 mmol) in anhydrous DMF (125 mL) is added methyl iodide (13.2 mL, 213 mmol). The solution is cooled to 0° C. and sodium hydride (60% susp. in oil, 3.84 g, 160 mmol) is added in small portions over 20 min. The reaction mixture is then left stirring and slowly warmed up to room temperature for 18 h. At 0° C., water (500 mL) is then slowly added then extracted with ethyl acetate containing 10% of hexanes. The organic layer is separated, dried with MgSO4, filtered and concentrated under reduced pressure to provide the expected product 2-(4-bromo-3-methylphenyl)-2-methylpropanenitrile (12.6 g, 99%) as a clear yellow oil which is used in the next step without further purification. 1H NMR (400 MHz, CHLOROFORM-D) δ ppm 1.71 (s, 6H) 2.43 (s, 3H) 7.14 (dd, J=8.40, 2.34 Hz, 1H) 7.34 (d, J=2.54 Hz, 1H) 7.53 (d, J=8.40 Hz, 1H) The reaction mixture is then left slowly warmed up to room temperature for 18 h then extracted with ethyl acetate containing 10% of hexanes The organic layer is separated dried with MgSO4 filtered concentrated under reduced pressure

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 1-Bromo-4-(bromomethyl)-2-methylbenzene (45 of crude from step b, 68.2 mmol) dissolved in CH2Cl2 (500 mL) is mixed and stirred with potassium cyanide (24 g, 364 mmol) and N-tetra(n-butyl)ammonium bromide (1.2 g, 3.64 mmol) in distilled water (500 mL). This reaction mixture is stirred vigorously for 6 h. The organic phase is separated, dried over MgSO4, filtered and concentrated. The resulting residue is purified on silica gel using a 0 to 30% gradient of ethyl acetate in heptane to provide the expected product 2-(4-bromo-3-methylphenyl)acetonitrile (12.4 g, 87% over two steps) as a clear yellow oil. 1H NMR (400 MHz, CHLOROFORM-D) δ ppm 2.41 (s, 3H) 3.68 (s, 2H) 7.01 (dd, J=8.50, 2.05 Hz, 1H) 7.21 (d, J=1.37 Hz, 1H) 7.53 (d, J=8.20 Hz, 1H) is mixed The organic phase is separated dried over MgSO4 filtered concentrated The resulting residue is purified on silica gel using a 0 to 30% gradient of ethyl acetate in heptane

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 1-Bromo-4-(bromomethyl)-2-methylbenzene (45 of crude from step b, 68.2 mmol) dissolved in CH2Cl2 (500 mL) is mixed and stirred with potassium cyanide (24 g, 364 mmol) and N-tetra(n-butyl)ammonium bromide (1.2 g, 3.64 mmol) in distilled water (500 mL). This reaction mixture is stirred vigorously for 6 h. The organic phase is separated, dried over MgSO4, filtered and concentrated. The resulting residue is purified on silica gel using a 0 to 30% gradient of ethyl acetate in heptane to provide the expected product 2-(4-bromo-3-methylphenyl)acetonitrile (12.4 g, 87% over two steps) as a clear yellow oil. 1H NMR (400 MHz, CHLOROFORM-D) δ ppm 2.41 (s, 3H) 3.68 (s, 2H) 7.01 (dd, J=8.50, 2.05 Hz, 1H) 7.21 (d, J=1.37 Hz, 1H) 7.53 (d, J=8.20 Hz, 1H) is mixed The organic phase is separated dried over MgSO4 filtered concentrated The resulting residue is purified on silica gel using a 0 to 30% gradient of ethyl acetate in heptane

反应条件: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a stirred solution of 2-(4-bromo-3-methylphenyl)acetonitrile (11.2 g, 53.3 mmol) in anhydrous DMF (125 mL) is added methyl iodide (13.2 mL, 213 mmol). The solution is cooled to 0° C. and sodium hydride (60% susp. in oil, 3.84 g, 160 mmol) is added in small portions over 20 min. The reaction mixture is then left stirring and slowly warmed up to room temperature for 18 h. At 0° C., water (500 mL) is then slowly added then extracted with ethyl acetate containing 10% of hexanes. The organic layer is separated, dried with MgSO4, filtered and concentrated under reduced pressure to provide the expected product 2-(4-bromo-3-methylphenyl)-2-methylpropanenitrile (12.6 g, 99%) as a clear yellow oil which is used in the next step without further purification. 1H NMR (400 MHz, CHLOROFORM-D) δ ppm 1.71 (s, 6H) 2.43 (s, 3H) 7.14 (dd, J=8.40, 2.34 Hz, 1H) 7.34 (d, J=2.54 Hz, 1H) 7.53 (d, J=8.40 Hz, 1H) The reaction mixture is then left slowly warmed up to room temperature for 18 h then extracted with ethyl acetate containing 10% of hexanes The organic layer is separated dried with MgSO4 filtered concentrated under reduced pressure

反应条件: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a stirred solution of 2-(4-bromo-3-methylphenyl)acetonitrile (11.2 g, 53.3 mmol) in anhydrous DMF (125 mL) is added methyl iodide (13.2 mL, 213 mmol). The solution is cooled to 0° C. and sodium hydride (60% susp. in oil, 3.84 g, 160 mmol) is added in small portions over 20 min. The reaction mixture is then left stirring and slowly warmed up to room temperature for 18 h. At 0° C., water (500 mL) is then slowly added then extracted with ethyl acetate containing 10% of hexanes. The organic layer is separated, dried with MgSO4, filtered and concentrated under reduced pressure to provide the expected product 2-(4-bromo-3-methylphenyl)-2-methylpropanenitrile (12.6 g, 99%) as a clear yellow oil which is used in the next step without further purification. 1H NMR (400 MHz, CHLOROFORM-D) δ ppm 1.71 (s, 6H) 2.43 (s, 3H) 7.14 (dd, J=8.40, 2.34 Hz, 1H) 7.34 (d, J=2.54 Hz, 1H) 7.53 (d, J=8.40 Hz, 1H) The reaction mixture is then left slowly warmed up to room temperature for 18 h then extracted with ethyl acetate containing 10% of hexanes The organic layer is separated dried with MgSO4 filtered concentrated under reduced pressure

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 1-Bromo-4-(bromomethyl)-2-methylbenzene (45 of crude from step b, 68.2 mmol) dissolved in CH2Cl2 (500 mL) is mixed and stirred with potassium cyanide (24 g, 364 mmol) and N-tetra(n-butyl)ammonium bromide (1.2 g, 3.64 mmol) in distilled water (500 mL). This reaction mixture is stirred vigorously for 6 h. The organic phase is separated, dried over MgSO4, filtered and concentrated. The resulting residue is purified on silica gel using a 0 to 30% gradient of ethyl acetate in heptane to provide the expected product 2-(4-bromo-3-methylphenyl)acetonitrile (12.4 g, 87% over two steps) as a clear yellow oil. 1H NMR (400 MHz, CHLOROFORM-D) δ ppm 2.41 (s, 3H) 3.68 (s, 2H) 7.01 (dd, J=8.50, 2.05 Hz, 1H) 7.21 (d, J=1.37 Hz, 1H) 7.53 (d, J=8.20 Hz, 1H) is mixed The organic phase is separated dried over MgSO4 filtered concentrated The resulting residue is purified on silica gel using a 0 to 30% gradient of ethyl acetate in heptane

反应条件: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a stirred solution of 2-(4-bromo-3-methylphenyl)acetonitrile (11.2 g, 53.3 mmol) in anhydrous DMF (125 mL) is added methyl iodide (13.2 mL, 213 mmol). The solution is cooled to 0° C. and sodium hydride (60% susp. in oil, 3.84 g, 160 mmol) is added in small portions over 20 min. The reaction mixture is then left stirring and slowly warmed up to room temperature for 18 h. At 0° C., water (500 mL) is then slowly added then extracted with ethyl acetate containing 10% of hexanes. The organic layer is separated, dried with MgSO4, filtered and concentrated under reduced pressure to provide the expected product 2-(4-bromo-3-methylphenyl)-2-methylpropanenitrile (12.6 g, 99%) as a clear yellow oil which is used in the next step without further purification. 1H NMR (400 MHz, CHLOROFORM-D) δ ppm 1.71 (s, 6H) 2.43 (s, 3H) 7.14 (dd, J=8.40, 2.34 Hz, 1H) 7.34 (d, J=2.54 Hz, 1H) 7.53 (d, J=8.40 Hz, 1H) The reaction mixture is then left slowly warmed up to room temperature for 18 h then extracted with ethyl acetate containing 10% of hexanes The organic layer is separated dried with MgSO4 filtered concentrated under reduced pressure