Abstract
The main reaction brought about by r-irradiation upon pyridiRecarboxylic and pyridine dicarboxylic acids in solid state was decarboxylation. As a rule, weakly bonded cqrboxy groyp would pieferentially be eliminated. Among three pyridinecarboxylic acids 2-pyridin-ecarboxylic acid w- decarboxylated by r-irradiation in the highest yield. ln 2, 3-pyridinedicarboxylic acid, G-value of decarbexylation at 2-position was greater than that at 3-position by a factor of three.
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