Method for producing bis(3-amino-4-hydroxyphenyl) compounds
AssigneeNippon Kayaku Kabushiki Kaisha
InventorsJun-ichiro Tomaru, Kenji Kunikata, Masaki Fujimoto
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Abstract
Disclosed is a method for producing bis(3-amino-4-hydroxyphenyl) compounds, which comprises reducing bis(3-nitro-4-hydroxyphenyl) compounds with hydrazines in the presence of a catalyst. The method produces bis(3-amino-4-hydroxyphenyl) compounds of high quality under mild conditions at high yields. The products can be isolated and purified in a simple manner to have a higher purity. The method is suitable to industrial-scale production of the products.
Claims3
A method for 2,2-bis(3-amino-4-hydroxyphenyl) 1,1,1,3,3,3-hexafluoropropane, which comprises reducing 2,2-bis(3-nitro-4-hydroxyphenyl) 1,1,1,3,3,3-hexafluoropropane with hydrazines in the presence of platinum and/or palladium catalyst.
Dependencies are inferred from the claim text.