SYNTHESIS AND PHARMACOLOGICAL PROPERTIES OF PYRAZOLOTRIAZOLOPYRIMIDINE DERIVATIVES

As a part of research on anti-inflammatory-analgesic compounds, pyrazolotriazolopyrimidines were prepared by cycling the corresponding 2-phenylamino-3-aminopyrazolo[3,4-d]pyrimidin-4-one derivatives 3a-h with triethylorthoformate, in the presence of p-toluenesulfonic acid. The results of the pharmacological screening indicate that some of the derivatives which were tested, especially 3c and 6e, showed a good anti-inflammatory activity associated with non-narcotic analgesic properties and a remarkable systemic and gastric tolerance.