5-chloro-2-fluorobenzonitrile

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:

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

Procedure: A mixture of 5-chloro-2-fluoro-benzonitrile (2.84 g, 0.01823 mol), butanol (15 mL), sodium azide (1.543 g, 0.0237 mol), acetic acid (1.36 mL, 0.0237 mol) was refluxed for 24 hours. The reaction mixture was cooled to room temperature, additional 1.543 g sodium azide added, and the reaction mixture refluxed for additional 24 hours. After cooling to room temperature, Et2O (100 mL) and 10% aqueous NaOH (200 mL) were added sequentially. The mixture was vigorously stirred. The aqueous layer was separated, cooled with ice-methanol bath (−15° C.) and acidified to pH 1 with conc. HCl. A gray solid precipitated. The solid was dried in vacuum at 50° C. to give 1.76 g (49%) of 5-(5-chloro-2-fluoro-phenyl)-1H-tetrazole: mp partial melt at 110° C., complete melting at 124° C.); was refluxed for 24 hours the reaction mixture refluxed for additional 24 hours After cooling to room temperature The aqueous layer was separated cooled with ice-methanol bath (−15° C.) A gray solid precipitated The solid was dried in vacuum at 50° C.

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

Procedure: A mixture of 5-chloro-2-fluoro-benzonitrile (2.84 g, 0.01823 mol), butanol (15 mL), sodium azide (1.543 g, 0.0237 mol), acetic acid (1.36 mL, 0.0237 mol) was refluxed for 24 hours. The reaction mixture was cooled to room temperature, additional 1.543 g sodium azide added, and the reaction mixture refluxed for additional 24 hours. After cooling to room temperature, Et2O (100 mL) and 10% aqueous NaOH (200 mL) were added sequentially. The mixture was vigorously stirred. The aqueous layer was separated, cooled with ice-methanol bath (−15° C.) and acidified to pH 1 with conc. HCl. A gray solid precipitated. The solid was dried in vacuum at 50° C. to give 1.76 g (49%) of 5-(5-chloro-2-fluoro-phenyl)-1H-tetrazole: mp partial melt at 110° C., complete melting at 124° C.); was refluxed for 24 hours the reaction mixture refluxed for additional 24 hours After cooling to room temperature The aqueous layer was separated cooled with ice-methanol bath (−15° C.) A gray solid precipitated The solid was dried in vacuum at 50° C.

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

Procedure: A mixture of 5-chloro-2-fluoro-benzonitrile (2.84 g, 0.01823 mol), butanol (15 mL), sodium azide (1.543 g, 0.0237 mol), acetic acid (1.36 mL, 0.0237 mol) was refluxed for 24 hours. The reaction mixture was cooled to room temperature, additional 1.543 g sodium azide added, and the reaction mixture refluxed for additional 24 hours. After cooling to room temperature, Et2O (100 mL) and 10% aqueous NaOH (200 mL) were added sequentially. The mixture was vigorously stirred. The aqueous layer was separated, cooled with ice-methanol bath (−15° C.) and acidified to pH 1 with conc. HCl. A gray solid precipitated. The solid was dried in vacuum at 50° C. to give 1.76 g (49%) of 5-(5-chloro-2-fluoro-phenyl)-1H-tetrazole: mp partial melt at 110° C., complete melting at 124° C.); was refluxed for 24 hours the reaction mixture refluxed for additional 24 hours After cooling to room temperature The aqueous layer was separated cooled with ice-methanol bath (−15° C.) A gray solid precipitated The solid was dried in vacuum at 50° C.

Conditions: temp:100.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A mixture of (S)-methyl 6-bromo-5-hydroxy-2-methyl-3,4-dihydroquinoline-1(2H)-carboxylate (0.050 g, 0.167 mmol), 5-chloro-2-fluorobenzonitrile (0.065 g, 0.416 mmol), and cesium carbonate (0.136 g, 0.416 mmol) in DMF (2.0 mL) was heated at 100° C. for 16 h. The reaction mixture was cooled to room temperature and water was added. The mixture was partitioned between ethyl acetate and water. The aqueous phase was separated and extracted with ethyl acetate. The combined organic phases were washed with brine, dried over anhydrous sodium sulfate, filtered, and concentrated to afford a brown oil. This material was purified via column chromatography on silica gel (Biotage 25 g column, gradient elution with 0-25% ethyl acetate-hexane) to afford (S)-methyl 6-bromo-5-(4-chloro-2-cyanophenoxy)-2-methyl-3,4-dihydroquinoline-1(2H)-carboxylate (0.068 g, 94%) as an off-white solid. MS (ESI, pos. ion) m/z 435, 437 [M+H]+. The reaction mixture was cooled to room temperature The mixture was partitioned between ethyl acetate and water The aqueous phase was separated extracted with ethyl acetate The combined organic phases were washed with brine dried over anhydrous sodium sulfate filtered concentrated to afford a brown oil This material was purified via column chromatography on silica gel (Biotage 25 g column, gradient elution with 0-25% ethyl acetate-hexane)

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

Procedure: (Step 1) To a solution (of 2-oxazolidone (1.23 g) in N,N-dimethylformamide (20 ml) was added sodium hydride (0.62 g) under ice-cooling, and the mixture was stirred for 5 min. 5-Chloro-2-fluorobenzonitrile (2.0 g) was added, and the mixture was stirred at room temperature for 2 hr. Saturated brine was added to the reaction solution, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, dried over magnesium sulfate, and filtered. The solvent was evaporated under reduced pressure. The residue was crystallized from ethyl acetate-hexane to give 5-chloro-2-(2-oxo-1,3-oxazolidin-3-yl)benzonitrile (1.8 g) as a white solid. cooling the mixture was stirred at room temperature for 2 hr the mixture was extracted with ethyl acetate The organic layer was washed with saturated brine dried over magnesium sulfate filtered The solvent was evaporated under reduced pressure The residue was crystallized from ethyl acetate-hexane