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

Participants

Reaction Steps

Prepared by the method of Example 15b), from N-(2-hydroxy-5-trifluoromethylphenyl)-2-fluoro-5-nitrobenzamide (667 g, 2.3 mmol) and p-toluenesulfonic acid monohydrate (961 g, 5.1 mmol) the subtitle compound was obtained (349 mg, 56%). 1H NMR (DMSO) δ 8.95(m, 1H), 8.56(m, 1H), 8.36(s, 1H), 8.12(d, 1H), 7.84(m, 2H).

Provenance & Evidence