Scheme 9.
Synthetic route of 5-Aryl-2-amino-1,3,4-oxadiazole derivatives. R1 = Ph, 4-t-BuC6H4, 4-NH2 C6H4, 4-OH C6H4, 4-NO2 C6H4, 3-NO2 C6H4, 4-Cl C6H4, 2-Cl C6H4, 4-Pyridyl, EtO.
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