Summary Rissic acid which is obtained by oxidation of derric acid is converted into decarboxyrissic acid with elimination of one carboxyl group. Nitrodecarboxyrissic acid is formed by the action of dilute nitric acid on rissic acid. Chlorodecarboxyrissic acid results from the action of phosphorus pentachloride on decarboxyrissic acid. Decarboxyrissic acid is shown by synthesis to be 3, 4-dimethoxyphenoxyacetic acid. The 2, 5- ...
