Method for preparing N,N-disubstituted hydroxylamines

Details Method for preparing N,N-disubstituted hydroxylamines Method for preparing N,N-disubstituted hydroxylamines

1998-05-21

2000-02-29

Kunz, Gary L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Hydroxamic acid halides or chalcogen analogs therof

564300, 564301, 430250, C07C23900, C07C25900

Patent

active

060311304

ABSTRACT:
A method for preparing N,N-disubstituted hydroxylamine compounds represented by the formula (II): HO--N(R.sup.1)(R.sup.2) wherein R.sup.1 and R.sup.2 may be the same or different, and independently represent a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aromatic heterocyclic group, which comprises the step of adding a rhenium catalyst and aqueous hydrogen peroxide to a mixture containing a secondary amine compound represented by the formula (I): HN(R.sup.1)(R.sup.2) wherein R.sup.1 and R.sup.2 have the same meanings as those defined above and a dehydrating agent.

REFERENCES:
patent: 3293034 (1966-12-01), Green et al.
patent: 3491151 (1970-01-01), Bader
patent: 4782105 (1988-11-01), Ravichandran et al.
Synthesis of Nitrones by Methyltrioxorhenium Catalyzed Direct Oxidation of Secondary Amines; Tetrahedron Letters, vol. 37, No. 33, pp. 6025-6028, 1996.

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