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A Highly Active Protonated Tetranuclear Peroxotungstate for Oxidation with Hydrogen Peroxide
Author(s) -
Ishimoto Ryo,
Kamata Keigo,
Mizuno Noritaka
Publication year - 2012
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201201049
Subject(s) - hydrogen peroxide , protonation , chemistry , cyclooctene , catalysis , peroxide , combinatorial chemistry , organic chemistry , ion
Acid assists : The reaction of [{WO(O 2 ) 2 } 2 (μ‐O)] 2− with 0.5 equivalents of HNO 3 gave a tetranuclear peroxotungstate ( 1 ; see picture) that has a dramatically enhanced activity for the epoxidation of cyclooctene with H 2 O 2 compared to various peroxotungstates. The 1 ‐catalyzed system was applicable to the selective oxidation of various kinds of substrates with 1.0–1.5 equivalents of H 2 O 2 .
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