4-Fluorophenylboronic acid → HCID 59320849, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of PdCl2dppf (300 mg, 0.4 mmol), N-(5-bromo-3-nitro-pyridin-2-yl)-benzene-1,3-diamine (Preparation P1, 2.5 g, 8.2 mmol) and 4-fluorophenylboronic acid (1.4 g, 10 mmol) in DME (16 ml) and 2N Na2CO3 (16 ml) was deoxygenated by evacuate/fill N2 (×3), then stirred and heated at 80° C. under N2 for 4 hours. After cooling to RT the mixture was partitioned between EtOAc/H2O and then filtered through Celite. The organic layer was washed with brine (×1) then dried (MgSO4), filtered and evaporated. The residue was purified by chromatography on silica (10→50% EtOAc/petrol) to give the title compound (1.66 g) as a dark red/brown solid. 1H NMR (400 MHz, DMSO-d6): 9.85 (1H, s), 8.87 (1H, d), 8.70 (1H, d), 7.82 (2H, dd), 7.33 (2H, t), 7.02 (1H, t), 6.92-6.81 (2H, m), 6.40 (1H, d), 5.15 (2H, s).

Provenance & Evidence