p-Toluenesulfonic acid monohydrate → 2-(3-Nitro-6-fluorophenyl)-5-fluorobenzoxazole

Participants

Reaction Steps

Prepared by the method of Example 15b), from N-(2-hydroxy-5-fluorophenyl)-2-fluoro-5-nitrobenzamide (676 mg, 2.3 mmol) and p-toluenesulfonic acid monohydrate (961 g, 5.1 mmol) the subtitle compound was obtained (318 mg, 50%). 1H NMR (DMSO) δ 8.94(m, 1H), 8.54(m, 1H), 7.95(m, 1H), 7.81(m, 2H), 7.41(m, 1H).

Provenance & Evidence