Ethanol → 6-Methyl-2,4-bis(trichloromethyl)-2H,4H-1,3-benzodioxine

Participants

Reaction Steps

Solid sodium nitrite (1.34 g.) was added in portions to a boiling suspension of 8-amino-6-methyl-2,4-bis(trichloromethyl)benzo[1,3]dioxin (4.7 g.) in a mixture of absolute ethanol (20 ml.), toluene (5 ml.) and concentrated sulphuric acid (1.34 ml.). The mixture was heated under reflux for 3 hours, cooled to ambient temperature and evaporated to dryness under reduced pressure. The oily residue was triturated with petroleum ether (b.p. 60°-80° C.) and filtered, and the solid was crystallised from aqueous ethanol to give 6-methyl-2,4-bis(trichloromethyl)benzo[1,3]dioxin m.p. 134°-135° C.

Provenance & Evidence