✦ LIBER ✦

Rhenium-catalyzed oxidation of arenes—an improved synthesis of vitamin K3

✍ Scribed by Wolfgang A. Herrmann; Joachim J. Haider; Richard W. Fischer

Book ID: 104424029
Publisher: Elsevier Science
Year: 1999
Tongue: English
Weight: 144 KB
Volume: 138
Category: Article
ISSN: 1381-1169
DOI: 10.1016/s1381-1169(98)00133-2

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✦ Synopsis

2-Methylnaphthalene 1 is oxidized to 2-methyl-1,4-naphthoquinone 2 by virtue of a new catalyst system in high yields and selectivity. A mixture of aqueous hydrogen peroxide and acetic anhydride is used as oxidant in the presence of Ž . methyltrioxorhenium VII dissolved in acetic acid as solvent. The concentration of acetic acid in the reaction mixture plays a Ž . crucial role for the activation of acetic anhydride mediated by methyltrioxorhenium VII .

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