反应详情

A mixture of 2,2,2-trifluoroethane-1,1-diol (75% aq solution, 20 g, 0.13 mol), CH3NO2 (24 g, 0.39 mol) and Na2CO3 (0.85 g, 8 mmol) was stirred overnight at RT. Water (50 mL) was added and the mixture was extracted with diethyl ether (3×30 mL) and dried over Na2SO4. After concentrating the organic extract at low temperature and under reduced pressure, P2O5 (20.0 g, 0.14 mol) was added to the residue oil, which was distilled at atmospheric pressure to give a green-yellow oil (4 g, 50% purity, 10% yield). Boiling point 85-90° C.; 1H NMR (400 MHz, CDCl3) δ ppm 7.09-7.17 (m, 1 H), 7.50 (dd, J=2.0 Hz, 12.0 Hz, 1 H).

1. extractionthe mixture was extracted with diethyl ether (3×30 mL)
2. dry with materialdried over Na2SO4
3. concentrationAfter concentrating the
4. additionwas added to the residue oil, which
5. distillationwas distilled at atmospheric pressure
6. customto give a green-yellow oil (4 g, 50% purity, 10% yield)