反应详情

温度

150 °C

3-Amino-pyridin-2-ol (50 mg, 0.45 mmol), 4-dimethylamino-benzoic acid (74 mg, 0.45 mmol), trichloroacetonitrile (91 μL, 0.91 mmol), and polystyrene triphenylphosphine (425 mg, 1.362 mmol) were suspended in acetonitrile (4.5 mL) and heated by microwave to 150° C. for 15 min. The crude reaction mixture was filtered and concentrated affording a residue which was purified by reverse phase chromatography affording dimethyl-(4-oxazolo[5,4-b]pyridin-2-yl-phenyl)-amine (7.1 mg, 0.030 mmol, 6.6% yield). ES MS (M+H+)=240; 1H NMR (300 MHz, CDCl3): δ 8.24 (d, J=5.1 Hz, 1H); 8.14 (d, J=8.6 Hz, 2H); 7.95 (d, J=7.8 Hz, 1H); 7.28 (dd, J=7.7, 4.9 Hz, 2H); 6.78 (d, J=8.6 Hz, 1H); 3.09 (s, 6H); HRMS m/z 240.1122 (C14H13N3O1+H+ requires 240.1132).

1. customThe crude reaction mixture
2. filtrationwas filtered
3. concentrationconcentrated
4. customaffording a residue which
5. customwas purified by reverse phase chromatography