Phosgene → HCID 66969259, compound

Participants

Reaction Steps

5-(4-Nitrophenyl)-3-(4-trifluoromethylphenyl) 3H-[1,3,4]oxadiazole-2-one was prepared by treating the corresponding 4-nitrobenzoic acid N′-(4-trifluoromethylphenyl)hydrazide with phosgene, using conditions described by Reimlinger et al. in Chem. Ber. 1970, 103, 1934. The nitro group was then reduced to the amine by treatment with hydrogen and Pd/C in EtOH: mp 160-163° C.; 1H NMR (400 MHz, CDCl3) δ 8.1 (d, J=8.4 Hz, 2H), 7.75 (m, 4H), 6.75 (d, J=8.4 Hz, 2H), 4.1 (br s, 2H); MS m/z 322.6 (MAI).

Provenance & Evidence