2-Nitrophenol → HCID 66874125, compound

Participants

Reaction Steps

A mixture of methyl 2-chloro-7-fluoro-2,3-dihydrobenzoxazole-4-carboxylate (720 mg, 3.14 mmol), o-nitrophenol (660 mg, 4.71 mmol) and K2CO3 (0.96 g, 7.0 mmol), in THF (10 mL), was stirred at ambient for 2.5 h. The reaction mixture was filtered and gaseous ammonia was bubbled through the mother liquor for 10 min. The precipitate formed was filtered and washed with THF (20 mL). The combined THF fractions were concentrated, and the resulting residue crystallized from methanol to afford methyl 2-amino-7-fluorobenzoxazole-4-carboxylate (173 mg, 26%) as a pale yellow solid. 1H NMR and MS consistent.

Provenance & Evidence