Preparation of biphenols by oxidative coupling of alkylphenols using a recyclable copper catalyst
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United States of America Patent
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Feb 10, 2004
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N/A
app pub date -
Aug 26, 2002
filing date -
Feb 23, 2000
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Expired
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Abstract
A method for producing biphenols by oxidative coupling of dialkylphenols which proceeds in two stages using a copper amine complex which is catalytically effective in each stage is disclosed. A novel copper amine complex is also disclosed wherein the complex exhibits high catalytic activity for the oxidative coupling of substituted phenols under mild conditions, has dual (two stage) activity and can be readily recycled and reused.
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