Method for the sequential oxidation of substituted-8-...

Details Method for the sequential oxidation of substituted-8-... Method for the sequential oxidation of substituted-8-...

C - Chemistry, Metallurgy

07

D

260/296, 260/291

C07D 213/80 (2006.01) C07D 215/26 (2006.01) C07D 215/54 (2006.01) C07D 221/04 (2006.01)

Patent

CA 1327584

Abstract of the Invention The present invention provides a novel process for the preparation of substituted pyridine-2,3-dicarboxylic acids by the sequential peroxide-hypochlorite oxidations of substituted-8- hydroxyquinolines. The substituted pyridine-2,3-dicarboxylic acids have the formula (I) Image (I) wherein X is hydrogen, halogen or methyl with the proviso that if Y and Z form a ring in which YZ comprise (CH2)n where n is 3 or 4 then X is hydrogen and Y and Z are each selected from radicals such as hydrogen, halogen, C1-C6alkyl or together can form a ring in which YZ comprise (CH2)n where n is 3 or 4. The substituted 8-hydroxyquinolines have the formula II Image II where X, Y and Z are as above.

593053

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