2,4-dichlorobenzoyl cyanide

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

Procedure: The reaction was carried out under Argon. Cuprous cyanide (5.0 g, 56.0 mmol) and anhydrous sodium iodide (15.6 g, 104 mmol) were stirred for 2 minutes in anhydrous acetonitrile (100 ml). The resulting solution was mixed with 2,4-dichlorobenzoyl chloride (10.96 g, 52.3 mmol) whereupon an orange precipitate formed. The mixture was stirred for 30 minutes at room temperature, filtered and concentrated in vacuo. The residue was taken up in dichloromethane and the resulting precipitate was filtered off. Concentration of the filtrate under reduce pressure gave a yellow solid which was recrystallised from 60°-80° C. b.p.t. petroleum ether to give 2,4-dichlorobenzoyl cyanide as cream coloured crystals (8.36 g, 80%), melting point 73°-74° C. formed filtered concentrated in vacuo the resulting precipitate was filtered off gave a yellow solid which was recrystallised from 60°-80° C. b.p.t

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

Procedure: The reaction was carried out under Argon. Cuprous cyanide (5.0 g, 56.0 mmol) and anhydrous sodium iodide (15.6 g, 104 mmol) were stirred for 2 minutes in anhydrous acetonitrile (100 ml). The resulting solution was mixed with 2,4-dichlorobenzoyl chloride (10.96 g, 52.3 mmol) whereupon an orange precipitate formed. The mixture was stirred for 30 minutes at room temperature, filtered and concentrated in vacuo. The residue was taken up in dichloromethane and the resulting precipitate was filtered off. Concentration of the filtrate under reduce pressure gave a yellow solid which was recrystallised from 60°-80° C. b.p.t. petroleum ether to give 2,4-dichlorobenzoyl cyanide as cream coloured crystals (8.36 g, 80%), melting point 73°-74° C. formed filtered concentrated in vacuo the resulting precipitate was filtered off gave a yellow solid which was recrystallised from 60°-80° C. b.p.t

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

Procedure: 4,4-Dimethyl-1,3-cyclohexanedione [14.0 grams (g), 0.1 mole], 20.0 g (0.1 mole) 2,4-dichlorobenzoyl cyanide and 13.6 g (0.11 mole) anhydrous, powdered zinc chloride were combined in 100 milliliters (ml) methylene chloride. Triethylamine (10.1 g, 0.12 mole) was slowly added with cooling. The reaction mixture was stirred at room temperature for 5 hours and then poured into 2N hydrochloric acid. The aqueous phase was discarded and the organic phase was washed with 150 ml 5% Na2CO3 four times. The aqueous washings were combined and acidified with HCl, extracted with methylene chloride, dried and concentrated to yield 25.3 g of crude product. The crude product was chromatographed (2% AcOH/CH2Cl2) in 5 g aliquots then reduced on rotavap under reduced pressure at 50° C. for 30 minutes to remove AcOH. This yielded an oil (40% yield). The structure was confirmed by instrumental analysis. with cooling the organic phase was washed with 150 ml 5% Na2CO3 four times extracted with methylene chloride dried concentrated to yield 25.3 g of crude product The crude product was chromatographed (2% AcOH/CH2Cl2) in 5 g aliquots then reduced on rotavap under reduced pressure at 50° C. for 30 minutes to remove AcOH

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

Procedure: 1,3-Cyclohexanedione [11.2 grams (g), 0.1 mole], 20.0 g (0.1 mole) 2,4-dichlorobenzoyl cyanide and 13.6 g (0.11 mole) anhydrous, powdered zinc chloride were combined in 100 milliliters (ml) methylene chloride. Triethylamine (10.1 g, 0.12 mole) was slowly added with cooling. The reaction mixture was stirred at room temperature for 5 hours and then poured into 2N hydrochloric acid. The aqueous phase was discarded and the organic phase was washed with 150 ml 5% Na2CO3 four times. The aqueous washings were combined and acidified with HCl, extracted with methylene chloride, dried and concentrated to yield 25.3 g of crude product. The crude product was dissolved in ether and stirred with 250 ml of 5% copper (II) acetate. The resulting copper salt was filtered, washed with ether and stirred with 6N hydrochloric acid to destroy the salt. The extract was washed with ether to yield 22.15 grams of the desired product m.p. 138°-140° C. (77.7% yield). The structure was confirmed by instrumental analysis. with cooling the organic phase was washed with 150 ml 5% Na2CO3 four times extracted with methylene chloride dried concentrated to yield 25.3 g of crude product The resulting copper salt was filtered washed with ether stirred with 6N hydrochloric acid to destroy the salt The extract was washed with ether

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

Procedure: 1,3-Cyclohexanedione [11.2 grams (g), 0.1 mole], 20.0 g (0.1 mole) 2,4-dichlorobenzoyl cyanide and 13.6 g (0.11 mole) anhydrous, powdered zinc chloride were combined in 100 milliliters (ml) methylene chloride. Triethylamine (10.1 g, 0.12 mole) was slowly added with cooling. The reaction mixture was stirred at room temperature for 5 hours and then poured into 2N hydrochloric acid. The aqueous phase was discarded and the organic phase was washed with 150 ml 5% Na2CO3 four times. The aqueous washings were combined and acidified with HCl, extracted with methylene chloride, dried and concentrated to yield 25.3 g of crude product. The crude product was dissolved in ether and stirred with 250 ml of 5% copper (II) acetate. The resulting copper salt was filtered, washed with ether and stirred with 6N hydrochloric acid to destroy the salt. The extract was washed with ether to yield 22.15 grams of the desired product m.p. 138°-140° C. (77.7% yield). The structure was confirmed by instrumental analysis. with cooling the organic phase was washed with 150 ml 5% Na2CO3 four times extracted with methylene chloride dried concentrated to yield 25.3 g of crude product The resulting copper salt was filtered washed with ether stirred with 6N hydrochloric acid to destroy the salt The extract was washed with ether

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

Procedure: 4,4-Dimethyl-1,3-cyclohexanedione [14.0 grams (g), 0.1 mole], 20.0 g (0.1 mole) 2,4-dichlorobenzoyl cyanide and 13.6 g (0.11 mole) anhydrous, powdered zinc chloride were combined in 100 milliliters (ml) methylene chloride. Triethylamine (10.1 g, 0.12 mole) was slowly added with cooling. The reaction mixture was stirred at room temperature for 5 hours and then poured into 2N hydrochloric acid. The aqueous phase was discarded and the organic phase was washed with 150 ml 5% Na2CO3 four times. The aqueous washings were combined and acidified with HCl, extracted with methylene chloride, dried and concentrated to yield 25.3 g of crude product. The crude product was chromatographed (2% AcOH/CH2Cl2) in 5 g aliquots then reduced on rotavap under reduced pressure at 50° C. for 30 minutes to remove AcOH. This yielded an oil (40% yield). The structure was confirmed by instrumental analysis. with cooling the organic phase was washed with 150 ml 5% Na2CO3 four times extracted with methylene chloride dried concentrated to yield 25.3 g of crude product The crude product was chromatographed (2% AcOH/CH2Cl2) in 5 g aliquots then reduced on rotavap under reduced pressure at 50° C. for 30 minutes to remove AcOH

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

Procedure: 1,3-Cyclohexanedione [11.2 grams (g), 0.1 mole], 20.0 g (0.1 mole), 2,4-dichlorobenzoyl cyanide and 13.6 g (0.11 mole) anhydrous, powdered zinc chloride were combined in 100 milliliters (ml) methylene chloride. Triethylamine (10.1 g, 0.12 mole) was slowly added with cooling. The reaction mixture was stirred at room temperature for 5 hours and then poured into 2N hydrochloric acid. The aqueous phase was discarded and the organic phase was washed with 150 ml 5% Na2CO3 four times. The aqueous washings were combined and acidified with HCl, extracted with methylene chloride, dried and concentrated to yield 25.3 g of crude product. The crude product was dissolved in ether and stirred with 250 ml of 5% copper (II) acetate. The resulting copper salt was filtered, washed with ether and stirred with 6N hydrochloric acid to destroy the salt. The extract was washed with ether to yield 22.15 grams of the desired product m.p. 138°-140° C. (77.7% yield). The structure was confirmed by instrumental analysis. with cooling the organic phase was washed with 150 ml 5% Na2CO3 four times extracted with methylene chloride dried concentrated to yield 25.3 g of crude product The resulting copper salt was filtered washed with ether stirred with 6N hydrochloric acid to destroy the salt The extract was washed with ether

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

Procedure: 4,4-Dimethyl-1,3-cyclohexanedione [14.0 grams (g), 0.1 mole], 20.0 g (0.1 mole) 2,4-dichlorobenzoyl cyanide and 13.6 g (0.11 mole) anhydrous, powdered zinc chloride were combined in 100 milliliters (ml) methylene chloride. Triethylamine (10.1 g, 0.12 mole) was slowly added with cooling. The reaction mixture was stirred at room temperature for 5 hours and then poured into 2N hydrochloric acid. The aqueous phase was discarded and the organic phase was washed with 150 ml 5% Na2CO3 four times. The aqueous washings were combined and acidified with HCl, extracted with methylene chloride, dried and concentrated to yield 25.3 g of crude product. The crude product was chromatographed (2% AcOH/CH2Cl2) in 5 g aliquots then reduced on rotavap under reduced pressure at 50° C. for 30 minutes to remove AcOH. This yielded an oil (40% yield). The structure was confirmed by instrumental analysis. with cooling the organic phase was washed with 150 ml 5% Na2CO3 four times extracted with methylene chloride dried concentrated to yield 25.3 g of crude product The crude product was chromatographed (2% AcOH/CH2Cl2) in 5 g aliquots then reduced on rotavap under reduced pressure at 50° C. for 30 minutes to remove AcOH

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

Procedure: 1,3-Cyclohexanedione [11.2 grams (g), 0.1 mole], 20.0 g (0.1 mole) 2,4-dichlorobenzoyl cyanide and 13.6 g (0.11 mole) anhydrous, powdered zinc chloride were combined in 100 milliliters (ml) methylene chloride. Triethylamine (10.1 g, 0.12 mole) was slowly added with cooling. The reaction mixture was stirred at room temperature for 5 hours and then poured into 2N hydrochloric acid. The aqueous phase was discarded and the organic phase was washed with 150 ml 5% Na2CO3 four times. The aqueous washings were combined and acidified with HCl, extracted with methylene chloride, dried and concentrated to yield 25.3 g of crude product. The crude product was dissolved in ether and stirred with 250 ml of 5% copper (II) acetate. The resulting copper salt was filtered, washed with ether and stirred with 6N hydrochloric acid to destroy the salt. The extract was washed with ether to yield 22.15 grams of the desired product m.p. 138°-140° C. (77.7% yield). The structure was confirmed by instrumental analysis. with cooling the organic phase was washed with 150 ml 5% Na2CO3 four times extracted with methylene chloride dried concentrated to yield 25.3 g of crude product The resulting copper salt was filtered washed with ether stirred with 6N hydrochloric acid to destroy the salt The extract was washed with ether

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

Procedure: 1,3-Cyclohexanedione [11.2 grams (g), 0.1 mole], 20.0 g (0.1 mole) 2,4-dichlorobenzoyl cyanide and 13.6 g (0.11 mole) anhydrous, powdered zinc chloride were combined in 100 milliliters (ml) methylene chloride. Triethylamine (10.1 g, 0.12 mole) was slowly added with cooling. The reaction mixture was stirred at room temperature for 5 hours and then poured into 2N hydrochloric acid. The aqueous phase was discarded and the organic phase was washed with 150 ml 5% Na2CO3 four times. The aqueous washings were combined and acidified with HCl, extracted with methylene chloride, dried and concentrated to yield 25.3 g of crude product. The crude product was dissolved in ether and stirred with 250 ml of 5% copper (II) acetate. The resulting copper salt was filtered, washed with ether and stirred with 6N hydrochloric acid to destroy the salt. The extract was washed with ether to yield 22.15 grams of the desired product m.p. 138°-140° C. (77.7% yield). The structure was confirmed by instrumental analysis. with cooling the organic phase was washed with 150 ml 5% Na2CO3 four times extracted with methylene chloride dried concentrated to yield 25.3 g of crude product The resulting copper salt was filtered washed with ether stirred with 6N hydrochloric acid to destroy the salt The extract was washed with ether

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

Procedure: The reaction was carried out under Argon. Cuprous cyanide (5.0 g, 56.0 mmol) and anhydrous sodium iodide (15.6 g, 104 mmol) were stirred for 2 minutes in anhydrous acetonitrile (100 ml). The resulting solution was mixed with 2,4-dichlorobenzoyl chloride (10.96 g, 52.3 mmol) whereupon an orange precipitate formed. The mixture was stirred for 30 minutes at room temperature, filtered and concentrated in vacuo. The residue was taken up in dichloromethane and the resulting precipitate was filtered off. Concentration of the filtrate under reduce pressure gave a yellow solid which was recrystallised from 60°-80° C. b.p.t. petroleum ether to give 2,4-dichlorobenzoyl cyanide as cream coloured crystals (8.36 g, 80%), melting point 73°-74° C. formed filtered concentrated in vacuo the resulting precipitate was filtered off gave a yellow solid which was recrystallised from 60°-80° C. b.p.t

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

Procedure: The title compound was prepared as in Example 2(a) from 2,4-dichlorobenzoyl cyanide amidinohydrazone obtained in Example 3. The solvent for ring closure was a mixture of 1-propanol and dimethylsulfoxide (5:1). Total yield (from 2,4-dichlorobenzoyl cyanide): 55%; m.p. 220-222° C. (uncorrected).