Pentane → HCID 57705717, compound

Participants

Reaction Conditions

Reaction Steps

To a −78° C. solution of 2-bromo-1-butoxy-4-methoxybenzene 4.1 (250 mg, 965 μmol) in THF (8.0 mL) was added tert-butyllithium, 1.7 M solution in pentane (1248 μL, 2122 μmol) dropwise under a blanket of nitrogen. The pale yellow solution was stirred for 0.5 h at −78° C. before dropwise addition of neat trimethyl borate (175 μL, 1544 μmol) at the same temperature. The resulting mixture was stirred for 1 hour at −78° C., warmed to 25° C., and stirred for an additional hour. The reaction was quenched with saturated aqueous ammonium chloride and concentrated. The resulting residue was suspended in water/acetic acid (pH=3) and extracted with DCM. The combined organic layers were washed with saturated aqueous sodium bicarbonate and brine, dried (MgSO4), and concentrated to afford a light brown solid. The product was purified by trituration with hexane to afford 2-butoxy-5-methoxyphenylboronic acid 4.2 (67.2 mg, 31.1% yield) as a white powder.

Provenance & Evidence