Glyoxal, phenyl-, hydrate → 2-(3,5-Dichlorophenyl)-5-phenyl-2,3-dihydro-1,2,4-triazin-3-one

Participants

Reaction Steps

In 50 ml of dioxane was dissolved 2.20 g of 2-(3,5-dichlorophenyl)semicarbazide followed by addition of 1.52 g of phenylglyoxal monohydrate, and the mixture was refluxed for 5 hours. The reaction mixture was then concentrated and the residue was recrystallized from acetonitrile to provide 1.34 g of the title compound. m.p. 160-161° C.

Provenance & Evidence