Process for preparation of 2-substituted 1,4-naphthoquinone
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United States of America Patent
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Jul 12, 1994
Grant Date -
N/A
app pub date -
Nov 28, 1990
filing date -
Nov 28, 1989
priority date (Note) -
Expired
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Abstract
A process for preparation of a 2-substituted-1,4-naphthoquinone which comprises oxidizing a 2-substituted naphthalene to obtain reaction products comprising a 2-substituted-1,4-naphthoquinone and a 6-substituted-1,4-naphthoquinone; adding a diene compound to the reaction products and heating the mixture to form a Diels-Alder reaction adduct between the diene compound and the 6-substituted-1,4-naphthoquinone in the reaction products; and separating the 2-substituted-1,4-naphthoquinone from the adduct.
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