Hydrazine hydrate (1:1) → 6-(4-Chlorophenyl)-4,5-dihydro-1,2,4-triazin-3-one

Participants

Reaction Steps

Hydrazine hydrate (8.0 g, 160 mmol) and 19.55 g of 3-(2-(4-chlorophenyl)-2-oxo-ethyl)-thiazolidine-2,4-dione in 100 mL of methanol were stirred at room temperature over a weekend, then refluxed for 8 hours. The reaction mixture was cooled and the solids were filtered, washed with methanol and dried to give 9.06 g of white solid 6-(4-chlorophenyl)-4,5-dihydro-1,2,4-triazin-3-one (57% yield).

Provenance & Evidence