Imperial Chemical Industries Limited

Ronald Baker

Brian R Fishwick

David Boyd Baird

Robert D McClelland

A process for the manufacture of the heterocyclic compounds of the formula: ##STR1## wherein R is hydrogen, lower alkyl or phenyl, which comprises simultaneously decarboxylating and dinitrating a compound of the formula: ##STR2## wherein R has the meaning stated above, and finally hydrolyzing off the acyl group.

Process for manufacturing heterocyclic compounds

A process for the manufacture of the heterocyclic compounds of the formula: ##SPC1## Wherein R is a hydrogen atom or a hydrocarbon radical, which comprises decarboxylating and dinitrating a compound of the formula: ##SPC2## Wherein R has the meaning stated above, and finally hydrolysing off the acyl group, and the use of the said heterocyclic compounds as diazo components in the production of azo dyestuffs.

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Ronald Baker