反应详情

温度

200 °C

The following were introduced into 383.52 ml of phenyl oxide: 225.60 grams of 2-nitro-5-chloro-trifluoromethylbenzene, described in the German Patent No. DRP 637,318, 128.10 grams of 5,5-dimethylhydantoin described in Beil., Vol. 24, 289 and 198.53 grams of cuprous oxide. The mixture was heated to 200° C. for 24 hours, then cooled to 20° C. and filtered. The residue was rinsed with phenyl oxide, then extracted with ethyl acetate. The ethyl acetate phase was concentrated to dryness under reduced pressure at 60° C. and the residue was taken up in ammoniacal dichloroethane. The crystals obtained were dried at 60° C. to obtain 66.55 grams of crude product which, after purification from aqueous ethanol yielded 62.55 grams of purified desired product.

1. temperaturecooled to 20° C.
2. filtrationfiltered
3. washThe residue was rinsed with phenyl oxide
4. extractionextracted with ethyl acetate
5. concentrationThe ethyl acetate phase was concentrated to dryness under reduced pressure at 60° C.
6. customThe crystals obtained
7. customwere dried at 60° C.