HCID 19912233, compound → HCID 19912217, compound

Participants

Reaction Conditions

Reaction Steps

To a stirred mixture of 10.0 g (0.021 mole) of 1-[2,4-dichloro-5-(2-chloro-4-nitrophenoxy) phenyl]-4-difluoromethyl-4,5-dihydro-3-methyl-1,2,4-triazol-5(1H)-one in 100 ml of glacial acetic acid and 5 ml of water was added slowly 10.0 g (0.179 mole) of iron powder. The reaction mixture was heated at 50° C. and then was allowed to cool to room temperature at which it was stirred for 1.5 hours. The mixture was poured into ice-water, and the aqueous mixture was extracted with diethyl ether. The extract was evaporated under reduced pressure leaving a residue. This residue was purified by column chromatography to yield 8.5 g of 1-[5-(4-amino-2-chlorophenoxy)-2,4-dichlorophenyl]-4-difluoromethyl-4,5-dihydro-3-methyl-1,2,4-triazol-5(1H)-one as a solid, m.p. 161°-162° C., compound 180 of Table 1.

Provenance & Evidence