| 摘要 |
A process for oxidation of a tetrahydro compound of the formula <IMAGE> wherein R and R' independently are H, alkyl, aryl or halo, to a glycol of the formula <IMAGE> comprises treating the tetrahydro compound with hydrogen peroxide at an elevated temperature in the absence of a catalyst. The thus-formed glycol can be further oxidized in a butanetetracarboxylic acid of the formula <IMAGE> with hydrogen peroxide in the presence of a catalyst selected from the group consisting of a manganese salt, an iron salt, a chromium salt, a cerium salt, a persulfate, a perborate, a silicate, tungstic acid or an ammonium or alkali metal salt or heteropolyacid thereof, or molybdic acid or an ammonium or alkali metal salt or heteropolyacid thereof.
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