2-(4-bromo-3-chlorophenyl)acetonitrile

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: Sodium cyanide (10.91 g, 222.52 mmol) in water (10 mL) was added to a solution of chloroform (20 mL) of N-benzyl-N,N-diethylethanaminium chloride (25.3 g, 111.26 mmol). 1-Bromo-4-(bromomethyl)-2-chlorobenzene (31.64 g, 111.26 mmol) in chloroform (5 mL) was added dropwisely at room temperature. The mixture was stirred at room temperature for 1 h then heated to 45° C. for additional 2 h. The reaction mixture was cooled, separated into two layers and the organic layer was washed with 0.5 N NaOH then brine. The chloroform layer was dried over sodium sulfate, filtered and concentrated. The crude product was purified by flash Silica chromatography {CombiFlash Companion—Presearch Ltd}, column size=330 g, flow rate=100 mL/min, elution gradient 0 to 100% EtOAc in isohexane over 40 minutes. Pure fractions were evaporated to dryness to afford 2-(4-bromo-3-chlorophenyl)acetonitrile (2.430 g, 9.48%) as a orange/yellow oil which solidified on standing. then heated to 45° C. for additional 2 h The reaction mixture was cooled separated into two layers the organic layer was washed with 0.5 N NaOH The chloroform layer was dried over sodium sulfate filtered concentrated The crude product was purified by flash Silica chromatography {CombiFlash Companion—Presearch Ltd}, column size=330 g, flow rate=100 mL/min, elution gradient 0 to 100% EtOAc in isohexane over 40 minutes Pure fractions were evaporated to dryness