2-Chloroacrylonitrile → 4-Cyano-1-(2,6-difluorobenzyl)-1H-1,2,3-triazole

Participants

Reaction Conditions

Reaction Steps

A mixture of 2,6-difluorobenzyl azide (34.2 g), 2-chloroacrylonitrile (26.6 g) and water (125 ml) is stirred at about 80° C. for 24 hours. Excess 2-chloroacrylonitrile is distilled off by raising the external temperature to about 130° C. The mixture is cooled to about 95° C. and the product is crystallized by seeding. After cooling to about 40° C., the suspension is treated with cyclohexane (50 -ml) and brought to about 20° C., and stirred for about 2 hours. The product is isolated by filtration, washed with cyclohexane (75 ml) and then with water and dried in vacuo at about 60° C. Yield: 43.13 g=98%.

Provenance & Evidence