2,2-Bis(3-nitro-4-hydroxyphenyl)hexafluoropropane → 2,2-Bis(3-amino-4-hydroxyphenyl)hexafluoropropane

Participants

Reaction Steps

400.0 g of 2,2-bis(3-nitro-4-hydroxyphenyl)hexafluoropropane and 1200 cc of methanol were put into a 2000-cc four-neck flask equipped with a thermometer, a Dimroth condenser and a stirrer, and stirred therein, to which was added 9.0 g (dry weight) of E196R/W5%Pd. This was heated and kept at 60 to 65° C. with stirring, to which was dropwise added 313.2 g of an aqueous solution of 60% hydrazine monohydrate over a period of 4 hours. After the aqueous hydrazine solution was added, the mixture was stirred for further 30 minutes, and then gradually cooled to room temperature. After the catalyst was removed through filtration, the reaction mixture was concentrated to obtain a crude product of 2,2-bis(3-amino-4-hydroxyphenyl)hexafluoropropane. The crude yield was 336.8 g (98%). The purity in liquid chromatography was 97.9% (area %).

Provenance & Evidence