Hydrochloric Acid → 6-(4-Chlorophenyl)-1,2,4-triazin-3-one

Participants

Reaction Steps

A mixture of 3.64 g (17.4 mmol) of 6-(4-chlorophenyl)-4,5-dihydro-1,2,4-triazin-3-one, 4.0 g of sodium m-nitrobenzene sulfonate (17.8 mmol), 6.0 g of 50% sodium hydroxide (75.2 mmol) and 160 mL of water were refluxed overnight. The reaction mixture was cooled, then 1N aqueous HCl was added until the pH was slightly acidic to paper. The product was filtered, washed with water and dried to give 3.0 g of 6-(4-chlorophenyl)-1,2,4-triazin-3-one, which was used without further purification.

Provenance & Evidence