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Strategy for the multi-step synthesis of phenyl oxadiazole compound (36) acting against human rhinovirus. Conditions: (i) SOCl2, DMF, 70 °C; (ii) NH3, H2O, THF, 0–25 °C, 5 h; (iii) TFAA, pyridine, 16 h; (iv) EtOH, 90 °C,16 h; (v) TFAA, pyridine, 0–120 °C, 16 h; (vi) neat, 150 °C, 90 h
