反应详情

温度

120 °C

An oven-dried flask was charged with CuI (0.004 g, 0.02 mmol), 5-chloropyridine-2-thiol (0.015 g, 0.10 mmol), N,N-dimethylglycine (0.002 g, 0.02 mmol) and K3PO4 (0.048 g, 0.23 mmol), evacuated and backfilled with N2. Methyl 4-[(5-bromo-2-cyclopropyl-1,3-oxazol-4-yl)methoxy]benzoate (0.036 g, 0.10 mmol) and DMF (0.5 ml) was added under N2. The reaction mixture was heated at 120° C. overnight. The reaction was cooled to rt and filtered through a pad of silica gel eluting with EtOAc. The filtrate was concentrated and purified by reverse phase HPLC to give methyl 4-({5-[(5-chloropyridin-2-yl)sulfanyl]-2-cyclopropyl-1,3-oxazol-4-yl}methoxy)benzoate. 1H NMR (400 MHz, CDCl3) δ 8.36 (d, J=2.5 Hz, 1H), 7.90 (d, J=8.7, 2H), 7.48 (dd, J=8.4, 2.5 Hz, 1H), 6.95 (d, 3=8.7 Hz, 2H), 6.87 (d, J=8.4 Hz, 1H), 5.05 (s, 2H), 3.88 (s, 3H), 2.12 (m, 1H), 1.10 (m, 4H); FIRMS exact mass calc for C20H17ClN2O4S [M+H]+: 417.0670; observed: 417.0671.

1. customevacuated
2. temperatureThe reaction was cooled to rt
3. filtrationfiltered through a pad of silica gel eluting with EtOAc
4. concentrationThe filtrate was concentrated
5. custompurified by reverse phase HPLC