Process for the preparation of N,N-dihydrocarbylhydroxylamines

Details Process for the preparation of N,N-dihydrocarbylhydroxylamines Process for the preparation of N,N-dihydrocarbylhydroxylamines

1991-01-17

1992-09-01

Hollrah, Glennon H.

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

Organic compounds

Amino nitrogen containing

564300, C07C23908, C07C23910, C07C23912

Patent

active

051440750

ABSTRACT:
Symmetrically substituted N,N-dihydrocarbylhydroxylamines are prepared in a single step by the reaction of an aldehyde and hydroxylamine hydrochloride in an alcoholic solvent in the presence of hydrogen and a hydrogenation catalyst. The free N,N-dihydrocarbylhydroxylamine is liberated from the hydrochloride salt by treatment with alkali. N,N-dihydrocarbylhydroxylamines, particularly the N,N-dialkylhydroxylamines, are useful stabilizers for a variety of polymers.

REFERENCES:
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patent: 4782105 (1988-11-01), Ravichandran et al.
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patent: 4910340 (1990-03-01), Marans et al.
Vavon et al. "Sur l'hydrogenation catalytique des oximes, etc" Bull. Soc. Chim. France, 43, 231-237 (1928).
R. F. Borch et al., J. Am. Chem. Soc., 93, 2897 (1971).
G. W. Gribble et al., Synthesis, 1977, 856.

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