Oxidation catalytic system and process for producing ketoisophor

Details Oxidation catalytic system and process for producing ketoisophor Oxidation catalytic system and process for producing ketoisophor

1999-05-21

2000-12-26

Padmanabhan, Sreeni

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

Organic compounds

Oxygen containing

568338, 568357, 568377, C07C 4527

Patent

active

061662615

ABSTRACT:
In the presence of a catalytic system comprising a cyclic base and a complex of a transition metal with an N,N'-disalicylidenediamine, ketoisophorone or a derivative thereof is produced by oxidizing .beta.-isophorone or a derivative thereof with molecular oxygen with controlling the water content of a reaction system to 1% by weight or less at the initial stage of the reaction. Moreover, the above catalytic system further comprises a basic nitrogen-containing compound. The complex may be an N,N'-disalicylidene C.sub.2-5 alkylenediamine complex with manganese, iron, cobalt, copper, or vanadium. The cyclic base may be an alicyclic or aromtaic compound having at least two nitrogen atoms. As the basic nitrogen-containing compound, a Schiff base such as an imino compound and an anil compound can be used. The proportion of the nitrogen-containing compound to the complex is about 0.1/1 to 20/1 (molar ratio). With the above oxydation catalytic system, there can be obtained ketoisophorone and derivatives thereof with high efficiency.

REFERENCES:
patent: 3354220 (1967-11-01), Brackman et al.
patent: 5874632 (1999-02-01), Hahn et al.
M. Constantini et al., Journal of Molecular Catalysis, vol. 7, pp. 89-97, (1980).
The Chemical Society of Japan, Chemistry Letters, No. 7, pp. 1081-1082, (1983).

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