DIARYL-2,5-OXADIAZOLES 1,3,4-HYDROXYESTER, HYDROXYACIDE AND ACETOXYACIDE, PROCESS FOR THEIR SYNTHESIS.

摘要

The invention relates to 2,5-diaryl-oxadiazoles-1,3,4 with hydroxy ester, hydroxy acid and acetoxy acid endings of formula: ## STR2 ## wherein R 1 represents a hydroxyl or acetyl radical and R 2 represents a carboxyl radical and where R 1 and R 2 preferably simultaneously occupy the 3 and 3 'or 4' and 4 'positions. The hydroxyesters are prepared by cyclization of the corresponding diaromatic dihydrazide and the hydroxy acids are obtained by saponification of the preceding hydroxyesters. / P