p-Toluenesulfonic acid monohydrate → 2-(3-Nitro-6-fluorophenyl)-6,7-difluorobenzoxazole

Participants

Reaction Steps

Prepared by the method of Example 15b), from N-(2-hydroxy-3,4-difluorophenyl)-2-fluoro-5-nitrobenzamide (718 mg, 2.3 mmol) and p-toluenesulfonic acid monohydrate (961 g, 5.1 mmol) the subtitle compound was obtained (303 mg, 45%). 1H NMR (DMSO) δ 8.92(m, 1H), 8.57(m, 1H), 7.85(d, 1H), 7.81(m, 1H), 7.61(m, 1H).

Provenance & Evidence