Hydrazine hydrate (1:1) → HCID 1820695, compound

Participants

Reaction Conditions

Reaction Steps

In the next step, a 300 ml glass reaction vessel was charged with 20 grams (0.035 mol) of crude 2,2-bis[4-(3-nitrophenoxy)phenyl]-1,1,1,3,3,3-hexafluoropropane, 2 grams of active carbon, 0.2 gram of ferric chloride hexahydrate and 100 ml of IPA. The mixture was refluxed for 30 minutes with stirring and 7 grams (0.14 mol) of hydrazine hydrate was dropwise added at 60-70° C. during 2 hours, and refluxed for further 5 hours with stirring. The resultant reaction mixture was cooled, filtered to remove the catalyst and heated to distill off 60 ml of IPA. To the residue, 80 grams of 17.5% aqueous hydrochloric acid and 10 grams of sodium chloride were added and cooled to 20-25° C. with stirring. The separated crystals were filtered and recrystallized again from 40 ml of IPA and 80 grams of 17.5% aqueous hydrochloric acid. The resulting crystals were dissolved into 50% aqueous IPA solution and neutralized with aqueous ammonia to separate crystals. The crystals were filtered, washed with water, dried and recrystallized from the solvent mixture of benzene and n-hexane. Colorless crystals of 2,2-bis[4-(3-aminophenoxy)phenyl]-1,1,1,3,3,3-hexafluoropropane thus obtained were 13.6 grams (75% yield) and had a melting point of 137-139° C. The analytical results were as follows.

Provenance & Evidence