2',4,4"-m-terphenyltriols and fungal strain used to make same
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United States of America Patent
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Apr 14, 1992
Issued Date -
N/A
app pub date -
May 20, 1991
filing date -
Dec 24, 1990
priority date (Note) -
Expired
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Abstract
A. parasiticus is employed to hydroxylate 2'-hydroxyterphenyl compounds to terphenyltriols, which can be used to form branched polycarbonates. The hydroxylation reaction is enhanced by maintaining a sufficient amount of a carbon source in the culture medium-reaction medium to maintain the ammonium level below 300 ppm. during the bioconversion phase. Employment of a mutant strain of A. parasiticus which was isolated following ultraviolet light mutagenesis to reduce its tendency to produce aflatoxins is preferred.
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