Use of copper halide catalysts and certain epoxy compounds to ox

Details Use of copper halide catalysts and certain epoxy compounds to ox Use of copper halide catalysts and certain epoxy compounds to ox

1977-08-25

1978-10-17

Rush, Raymond V.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260566F, 423DIG14, C07D26356

Patent

active

041208625

ABSTRACT:
The combination of a copper halide catalyst certain peroxidic compounds has been found advantageous for the oxidation of Schiff bases of the formula ##STR1## to the corresponding benzoxazoles ##STR2## wherein one of R.sup.3 and R.sup.4 is --NO.sub.2 and the other is --H, alkyl of 1 to 20 carbons, or --NO.sub.2 ; and R.sup.1 and R.sup.2 are independently --H or alkyl of 1 to 20 carbons, with the proviso that R.sup.1, R.sup.2, R.sup.3 and R.sup.4 contain a total of 6 carbons. Benzoxazoles of the latter type have utility as organo-soluble, metallurgical extractants.

REFERENCES:
patent: 4020081 (1977-04-01), MacKay et al.
Stephens et al. (I)-J. Chem. Soc. 2791 (1949).
Stephens et al. (II)-J. Chem. Soc. 1722 (1950).

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