Dimethyl Sulfoxide → 2-(2,4-Dichlorophenyl)-2-[(1,2,4-triazol-1-yl)methyl]butyramide

Participants

Reaction Conditions

Reaction Steps

To a 1 liter flask was charged 206.5 g (0.7 mole) of alpha-(2,4-dichlorophenyl)-alpha-ethyl-1H-1,2,4-triazole-1-propanenitrile and 500 mL of dimethyl sulfoxide and 200 mL of water. To the stirring solution was added 67.2 g (0.84 moles) of 50% sodium hydroxide. The reaction mixture was heated at 91° C. (steam bath) for 3 hours after which GLC indicated the starting material was consumed. The reaction was cooled to 30° C. then poured into water and extracted with ethyl acetate. After drying, the ethyl acetate was treated with charcoal and filtered through Celite®. Removal of the solvent gave a foamy oil which was stirred and diluted with ethyl acetate then treated with hexane until cloudy. Within 1 hour a solid formed which was cooled at 0° C. The product was filtered and washed with an ether and hexane mixture, then dried and provided 172 g (79% yield) of a white solid, melting point 164°-165° C.

Provenance & Evidence