Hydrochloric Acid → HCID 13559523, compound

Participants

Reaction Steps

A solution containing 100.8 g of 8-(2-ethoxyethyl)-7-phenyl[1,2,4]triazolo[1,5-c]pyrimidin-5-amine (0.36 moles) dissolved in 600 ml of concentrated hydrochloric acid and 420 ml. of water is cooled to 3° C. with constant stirring. To the cooled solution is added (below the surface of the solution) a mixture containing 54 g. of sodium nitrite (0.72 moles) in 75 ml of water over a period of fifteen minutes. The reaction mixture is stopped and stirred in an ice-bath for 0.5 hour and then stirred at room temperature for one hour. To the reaction mixture is added 150 ml of water and the resulting mixture is allowed to remain overnight at room temperature. A precipitate formed and the mixture is filtered and the precipitate is washed with water and dried yielding a crude product. The crude product is recrystallized from diethylether yielding 5-chloro-8-(2-ethoxyethyl)-7-phenyl[1,2,4]triazolo[1,5-c]pyrimidine represented by the structural formula ##STR18## as a white solid having a melting point of 134°-135° C. and the following elemental analysis:

Provenance & Evidence