Ethanol → 4-Nitro-2-phenyl-2H-benzotriazole

Participants

Reaction Steps

A solution of 40.6 grams of 2,6-dinitrochlorobenzene, 21.6 grams phenylhydrazine and 350 milliliters of 95% ethanol is heated at the reflux temperature for 22 hours. Then the solvent is evaporated to yield a dark oil. To the oil is added 70 milliliters of acetic acid and the mixture is heated to reflux for 6 hours. After cooling to room temperature, the crude product is collected by filtration, washed with petroleum ether and then washed with hot methanol to yield 8.5 grams (18%) of product m.p. 155°-156° C. The analytical sample is recrystallized from methanol, m.p. 155°-156° C.

Provenance & Evidence