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Method for the production of 4,4′-1-(trifluoromethyl)alkylidene-bis-(2,6-diphenylphenols)
Method for the production of 4,4′-1-(trifluoromethyl)alkylidene-bis-(2,6-diphenylphenols)
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机译:制备4,4'-[1-(三氟甲基)亚烷基]-双-(2,6-二苯酚)的方法
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摘要
The present invention relates to a process for preparing 4,4′-[1-(trifluoromethyl)alkylidene]bis(2,6-diphenylphenols), in particular for preparing 4,4′-[1-(trifluoromethyl)ethylidene]bis(2,6-diphenylphenol), which comprises the self-condensation of cyclohexanone in the presence of a basic catalyst to form tricyclic condensation products, dehydrogenation of the resulting tricyclic condensation products in the presence of a supported transition metal catalyst in the condensed phase to form 2,6-diphenylphenol and reaction of the 2,6-diphenylphenol with a trifluoromethyl ketone. The invention further provides an improved process for preparing 2,6-diphenylphenol by aldol self-condensation of cyclohexanone.
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