3-Chlorothiophene-2-carbonyl chloride → 2-[5-(3-Chloro-2-thienyl)-1,2,4-oxadiazol-3-yl]pyrazine

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Reaction Steps

The title compound was prepared from pyrazine-2-amidoxime (42.2 mg, 0.306 mmol) and 3-chloro-thiophene-2-carbonyl chloride (55 mg, 0.30 mmol) similar to Example 16, and yielded 67.4 mg (84%) of white solid. 1H NMR (CDCl3): 9.45 (d, J=1.37 Hz, 1H), 8.81 (dd, J=2.48, 1.65 Hz, 1H), 8.77 (d, J=2.47 Hz, 1H), 7.66 (d, J=4.95 Hz, 1H), 7.16 (d, J=5.50 Hz, 1H).

Provenance & Evidence