3,4-Dichlorobenzonitrile

• 3,4-difluorobenzonitrile
• 3-chloro-4-fluorobenzonitrile
• 5-chloromethyl-3-( 3,4-dichlorophenyl)isoxazole
• N-[3-(2-pyridyl)isoquinolin-1-yl]-3,4-dichlorobenzamidine

6287-38-3

6574-99-8

GENERAL STEPS: 3,4-Dichlorobenzaldehyde (1.0 mmol, 1.0 eq.) was dissolved in 4 mL of aqueous solution containing acetic acid (1.0 mmol, 1.0 eq.) in a 10 mL round-bottomed flask at 0°C. The reaction was carried out at 50°C with stirring for 6 hours or monitored by thin-layer chromatography (TLC) until the reaction was complete. The reaction mixture was stirred at 50 °C for 6 h or monitored by thin layer chromatography (TLC) until the reaction was complete. Upon completion of the reaction, the reaction was quenched with 10% aqueous NaHCO3 (1 mL) and subsequently extracted with ethyl acetate (3 x 10 mL). The organic phases were combined, dried with anhydrous Na2SO4, filtered and concentrated by rotary evaporator to give the crude product 3,4-dichlorobenzonitrile. The product was characterized directly unless further purification by automated silica gel fast chromatography was required to remove trace impurities (three embodiments).