Process for reducing 5-(2-thenylidene) hydantoin to 5-(2-thenyl) hydantoin
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United States of America Patent
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Jul 26, 1994
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N/A
app pub date -
Feb 8, 1993
filing date -
Feb 7, 1992
priority date (Note) -
Expired
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Abstract
Preparation process for 5-(2-thenyl) hydantoin in which 5-(2-thenylidene) hydantoin is reacted in acetic acid with a phosphorous compound selected from the group consisting of red phosphorus and phosphonic acid, in the presence of a catalytic amount of an iodine compound selected from the group consisting of iodine and hydroiodic acid.
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