Process for producing substituted or unsubstituted naphthalic ac

Details Process for producing substituted or unsubstituted naphthalic ac Process for producing substituted or unsubstituted naphthalic ac

1978-10-11

1980-07-15

Raymond, Richard

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260507R, 260687R, 562408, C07B 300

Patent

active

042128137

ABSTRACT:
Process for producing substituted or unsubstituted naphthalic acids and acid anhydrides thereof by oxidation of corresponding acenaphthenes whose naphthalene nucleus may have one or two substituents from the group consisting of halogens, sulfonic acid groups, sulfonate groups, and nitro. The oxidation is performed at 30.degree.-150.degree. C. using molecular oxygen in the presence of (1) at least one heavy metal compound, such as cobalt acetate or manganese acetate, in an amount of 0.005-0.3 mole per mole of said acenaphthenes or a mixture of heavy metal compounds in that amount and a bromine compound in the range of 5.times.10.sup.-5 to 2.times.10.sup.-1 mole/liter of reaction solution as a catalyst and (2) at least one accelerator selected from the group consisting of lower fatty acid anhydrides, ketones and aldehydes, whereby side reactions such as condensation can be suppressed to a satisfactory extent, thereby leading to an improvement in yield of final product. A subsequent treatment of the oxidation product obtained by this process with peroxides, hypohalogenates, or molecular oxygen results in a higher yield.

REFERENCES:
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patent: 2966513 (1960-12-01), Fields
Tkacheva et al., Chemical Abstracts, vol. 87 (1977), 134788t.
Digurov et al., Chemical Abstracts, vol. 74 (1971), 124535a.
Hasebe et al., Chemical Abstracts, vol. 77 (1972), 75048v.
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Digurov et al., Chemical Abstracts, vol. 75 (1971), 88369j.
Plakidn et al., Chemical Abstracts, vol. 75 (1971), 5568z.
Marx et al., Chemical Abstracts, vol. 69 (1968), 18912h.
Rogovik et al., Chemical Abstracts, vol. 69 (1968), 18911g.

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