Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Patent
1983-01-10
1984-11-20
Lone, Werren B.
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
568731, C07C 3917
Patent
active
044840101
ABSTRACT:
Hindered hydroxybenzylcyclopentadienes and derivatives thereof, useful as antioxidants, are prepared by reacting cyclopentadiene, an alkali metal, and a hindered p-methylphenol having a displaceable group attached to the methyl group in the presence of a non-protic solvent; or in one step, by reacting cyclopentadiene, hindered phenol that is devoid of a group in the para position, formaldehyde, an amine, water, and an alkali metal hydroxide in the presence of a phase transfer catalyst; or in one step, by reacting cyclopentadiene and a hindered substituted p-methyl-phenol containing a displaceable group, in the presence of a non-protic solvent, water, an alkali metal hydroxide and a phase transfer catalyst. These compounds readily dimerize whereas the bis compounds are prepared in presence of an excess amount of the substituted p-methylphenol.
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Kap George A.
Lone Werren B.
Shust Nestor W.
The B. F. Goodrich Company
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