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Synlett 2005(9): 1389-1392
DOI: 10.1055/s-2005-868504
DOI: 10.1055/s-2005-868504
LETTER
© Georg Thieme Verlag Stuttgart · New York
Deoxygenation of N-Oxides with Triphenylphosphine, Catalyzed by Dichlorodioxomolybdenum(VI)
Further Information
Received
27 January 2005
Publication Date:
29 April 2005 (online)
Publication History
Publication Date:
29 April 2005 (online)
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Abstract
Chemoselective deoxygenation of N-oxides was carried out under mild conditions with common phosphines in the presence of dichlorodioxomolybdenum(VI).
Key words
N-oxides - azoxy compounds - molybdenum(VI) - nitrones - oxotransfer catalysis
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References
PPh3 only deoxygenates pyridine N-oxides at temperatures over 250 °C. [2b]
18We have found that in general alkylamines react with dioxomolybdenum chlorides leading to decomposition products some of them have been characterized as alkylammonium polymolybdates: Arnáiz, F. J.; Pedrosa, M. R.; Aguado, R. unpublished results.
19The complete reduction of 5 required about 15 h.