反应详情

A 1.4 M solution of sec-butyllithiuni in cyclohexane (3.0 mL) was added drop-wise to a solution of ethyl N-[2-(trifluoromethoxy)phenyl]carbamate (0.5000 g, 0.002006 mol) in THF (9 mL) at −70° C. After stirring for 1 hour a solution of iodine (0.51 g, 0.002 mol) in THF (1.0 mL) was added drop-wise at −70° C. Stirring was continued for another 1 hour then the mixture was quenched with saturated ammonium chloride solution. Water (50 mL) was added and the mixture extracted with diethyl ether (3×40 mL). The combined organic phases was washed with 40% sodium meta-bisulfite solution, water and brine, then dried over Na2SO4 and the solvent removed in vacuo to give the desired product in a 73% yield. 1H NMR (400 MHz, CDCl3): δ 1.29-1.36 (m, 3H), 4.21-4.28 (m, 2H), 6.21 (br, 1H), 7.05 (t, J=8.0 Hz, 1H), 7.30 (m, 1H) and 7.80 (dd, J=6.8, 1.2 Hz, 1H). MS (ES+): m/z 375.78 [MH+].

1. additionwas added drop-wise at −70° C
2. customthe mixture was quenched with saturated ammonium chloride solution
3. additionWater (50 mL) was added
4. extractionthe mixture extracted with diethyl ether (3×40 mL)
5. washThe combined organic phases was washed with 40% sodium meta-bisulfite solution, water and brine
6. dry with materialdried over Na2SO4
7. customthe solvent removed in vacuo