1,8-Diazabicyclo(5.4.0)undec-7-ene → 3-Bromo-4-(2-chloro-5-fluorophenoxy)pyridine

Participants

Reaction Steps

A mixture of 2-chloro-5-fluorophenol (1.50 g, 10.24 mmol), 3-bromo-4-chloropyridine (1.50 g, 7.79 mmol) and DBU (1.50 g, 9.85 mmol) were heated at 130° C. in NMP (10 mL) for 15 hours. The reaction mixture was cooled and partitioned between water (100 mL) and MTBE (100 mL). The organic layer was separated, washed with dilute aq NaOH and brine, dried (MgSO4) and concentrated in vacuo to provide 3-bromo-4-(2-chloro-5-fluorophenoxy)pyridine (1.98 g, 84% yield) as brownish oil suitable for use in the next reaction. MS (ESI) m/z: 303.9 (M+H+).

Provenance & Evidence