4-Fluorobenzyl bromide → ethyl 3-methyl-5-(1-(4-(methylsulfonyl)benzyl)-5-oxo-1H-1,2,4-triazol-4(5H)-yl)thiophene-2-carboxylate

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Reaction Steps

Following the procedure as described in Example 29, making variations as required to replace 4-fluorobenzyl bromide with 4-methylsulfonylbenzyl bromide to react with ethyl 3-methyl-5-(5-oxo-1H-1,2,4-triazol-4(5H)-yl)thiophene-2-carboxylate, the title compound was obtained as a yellowish solid in 81% yield: 1H NMR (300 MHz, CDCl3) δ 7.94 (d, J=7.9 Hz, 2H), 7.76 (s, 1H), 7.59 (d, J=7.9 Hz, 2H), 6.95 (s, 1H), 5.10 (s, 2H), 4.32 (q, J=7.1 Hz, 2H), 3.04 (s, 3H), 2.55 (s, 3H), 1.36 (t, J=7.1 Hz, 3H); MS (ES+) m/z 444.3 (M+23).

Provenance & Evidence