Oxidation of secondary and tertiary amines by a solid base catalyst

The catalytic oxidation of sec- and tert-amines to nitrones (Eq. (1)), amine N-oxides (Eq. (2)), respectively, is realised by HT- O t Bu catalyst, and benzonitrile as an additive, using 30% hydrogen peroxide at a faster rate in quantitative yields. The catalyst is reused for five recycles without si...

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Bibliographic Details
Published in:Journal of molecular catalysis. A, Chemical Chemical, 2004-08, Vol.217 (1), p.81-85
Main Authors: Choudary, B.M., Reddy, Ch.Venkat, Prakash, B.Veda, Bharathi, B., Kantam, M.Lakshmi
Format: Article
Language:English
Subjects:
Amines
Catalysis
Chemistry
Exact sciences and technology
General and physical chemistry
Heterogeneous catalysis
Mg–Al hydrotalcite
N-oxides
Oxidations
Solid base
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:The catalytic oxidation of sec- and tert-amines to nitrones (Eq. (1)), amine N-oxides (Eq. (2)), respectively, is realised by HT- O t Bu catalyst, and benzonitrile as an additive, using 30% hydrogen peroxide at a faster rate in quantitative yields. The catalyst is reused for five recycles without significant loss of activity and selectivity. A novel recyclable protocol is developed for the oxidation of secondary and tertiary amines to nitrones and amine N-oxides, respectively, by Mg-Al- O t Bu hydrotalcite (HT- O t Bu ) catalyst, and benzonitrile as an additive in methanol using 30% hydrogen peroxide at a faster rate in quantitative yields for the first time.
ISSN:1381-1169
1873-314X
DOI:10.1016/j.molcata.2004.02.021