4-(bromomethyl)-3-chlorobenzonitrile

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

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

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

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

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: 2-(Acetamido)-6-bromo-3-nitropyridine (3.21 g) was dissolved in dry N,N-dimethylformamide (16 ml), and sodium hydride (60% in oil, 326 mg) was added under ice-cooling. The mixture was stirred for 30 min. A solution of 2-chloro-4-cyanobenzyl bromide (2.34 g) in dry N,N-dimethylformamide (4 ml) was dropwise added at the same temperature, and the mixture was stirred at room temperature for 1 hr. The reaction mixture was poured into ice water and the mixture was extracted with ethyl acetate. The organic layer was dried over magnesium sulfate and concentrated to dryness under reduced pressure. The residue was purified by silica gel column chromatography (hexane/ethyl acetate=5/1) to give the objective compound (4.17 g) as a pale-yellow powder. cooling the mixture was stirred at room temperature for 1 hr the mixture was extracted with ethyl acetate The organic layer was dried over magnesium sulfate concentrated to dryness under reduced pressure The residue was purified by silica gel column chromatography (hexane/ethyl acetate=5/1)

Conditions: temp:80.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 4-[2-(tert-Butyldimethylsilanyloxy)ethyl]-1-trityl-1H-imidazole (3.98 g, 8.5 mmol) and 4-bromomethyl-3-chlorobenzonitrile (2.93 g, 12.7 mmol) are dissolved in MeCN (40 mL) and heated at 80° C. for 5 h. After cooling to room temperature MeOH (40 mL) and Et2NH (7 mL) are then added and the solution is warmed 70° C. for 1 h. The solution is evaporated to dryness and the residue purified via flash column chromatography (acetone/CH2Cl2 1:3→MeOH/CH2Cl2 5:95) to give 4-{5-[2-tert-butyl-dimethylsilanyloxy)ethyl]-imidazol-1-ylmethyl}-3-chlorobenzonitrile as an oil. MS (ESI) m/z 376.3, 378.3 (M+H). are then added the solution is warmed 70° C. for 1 h The solution is evaporated to dryness the residue purified via flash column chromatography (acetone/CH2Cl2 1:3→MeOH/CH2Cl2 5:95)

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

Procedure: 3-Chloro-4-methylbenzonitrile (2.34 g, 15.4 mmol), NBS (3.0 g, 16.9 mmol) and benzoyl peroxide (0.37 g, 1.54 mmol) are taken up in carbon tetrachloride (50 mL, 0.3M) and refluxed until the reaction is judged complete by TLC. The mixture is then allowed to cool to room temperature and is filtered. The filtrate is concentrated and purified via flash column chromatography (0-5% EtOAc/hexanes) to give 4-bromomethyl-3-chlorobenzonitrile as a white solid. HRMS (ESI) m/z 229.9133 (229.9193 calcd for C8H6ClBrN, M+H). refluxed until the reaction is filtered The filtrate is concentrated purified via flash column chromatography (0-5% EtOAc/hexanes)

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

Procedure: To a stirred solution of 2-choro-4-cyanobenzyl bromide (6.9 g, 30.0 mmol) in DMF (150 ml), was added sodium azide (2.0 g, 30 mmol) The reaction was stirred overnight at room temperature, and then filtered. The DMF was removed from filtrate in vacuo. The residue was dissolved in EtOAc (300 ml), washed with water (200 ml×3), brine (200 ml×1), dried over sodium sulfate. Removed solvent in vacuo to give 5.8 g of raw 2-choro-4-cyanobenzyl azide. filtered The DMF was removed from filtrate in vacuo The residue was dissolved in EtOAc (300 ml) washed with water (200 ml×3), brine (200 ml×1) dried over sodium sulfate

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of 4-(bromomethyl)-3-chlorobenzonitrile (4.8 g, 17 mmol) in toluene (50 mL) at 0° C. was added dropwise DIBA1-H (1.0 M solution in toluene; 23.9 mL), and the reaction mixture was stirred at 0° C. for 1 h. 10 M HCl in water (5 mL) was added until the reaction mixture turned to a white slurry and then additional 1 N HCl (20 mL) was added. The organic layer was collected and the aqueous layer was extracted with CHCl3. The combined organic layer was dried over Na2SO4 and concentrated under reduced pressure. The crude compound was purified by flash column chromatography (SiO2, 100-200 mesh; 5% EtOAc in n-Hexane) to afford the title compound as a white solid (3.8 g, 80%): mp 64-66° C.; 1H NMR (400 MHz, CDCl3) δ 10.00 (s, 1H), 7.92 (s, 1H), 7.78 (d, J=8.0 Hz, 1H), 7.64 (d, J=8.0 Hz, 1H), 4.60 (s, 2H); ESIMS m/z 232.78 ([M+H]+). The organic layer was collected the aqueous layer was extracted with CHCl3 The combined organic layer was dried over Na2SO4 concentrated under reduced pressure The crude compound was purified by flash column chromatography (SiO2, 100-200 mesh; 5% EtOAc in n-Hexane)

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a stirred solution of 4-(bromomethyl)-3-chlorobenzonitrile (4.8 g, 17 mmol) in toluene (50 mL) at 0° C. was added dropwise DIBA1-H (1.0 M solution in toluene; 23.9 mL), and the reaction mixture was stirred at 0° C. for 1 h. 10 M HCl in water (5 mL) was added until the reaction mixture turned to a white slurry and then additional 1 N HCl (20 mL) was added. The organic layer was collected and the aqueous layer was extracted with CHCl3. The combined organic layer was dried over Na2SO4 and concentrated under reduced pressure. The crude compound was purified by flash column chromatography (SiO2, 100-200 mesh; 5% EtOAc in n-Hexane) to afford the title compound as a white solid (3.8 g, 80%): mp 64-66° C.; 1H NMR (400 MHz, CDCl3) δ 10.00 (s, 1H), 7.92 (s, 1H), 7.78 (d, J=8.0 Hz, 1H), 7.64 (d, J=8.0 Hz, 1H), 4.60 (s, 2H); ESIMS m/z 232.78 ([M+H]+). The organic layer was collected the aqueous layer was extracted with CHCl3 The combined organic layer was dried over Na2SO4 concentrated under reduced pressure The crude compound was purified by flash column chromatography (SiO2, 100-200 mesh; 5% EtOAc in n-Hexane)