Isodextropimaric Acid.-The previously described chro- mium trioxide oxidation procedure was used without modi- fication to oxidize 1.40 g. of the isodextropimarinal-con- taining carbonyls isolated above. The resulting acids were isolated by basic extraction from ether solution as before. Evaporation of the ether solution yielded 0.65 g. of un- oxidized carbonyl compounds which gave a positive test with 2,4-dinitrophenylhydrazine and a negative Tollens test. A ...
