反应详情

4-(Trifluoromethoxy)phenylisocyanate (100 mg, 0.49 mmol) and 1-(4-aminopiperidin-1-yl)-2-methylbutan-1-one (90 mg, 0.49 mmol) was dissolved in CH2Cl2 (100 mL) and stirred for 12 h. The reaction was quenched by addition of water. The organic layer was isolated and the aqueous layer was extracted with EtOAc for 4 times. The combined organic layer was concentrated under vacuo and was further purified by flash chromatography (EtOAc:Hex/1:1) yielding final product (168 mg, 4.39 mmol, 89%). H-NMR (DMSO-d6) ∂ 0.80 (m, 3H), 0.97 (m, 3H), 1.28 (m, 3H), 1.53 (m, 1H), 1.85 (tbr, 2H), 2.71 (m, 1H), 2.78 (m, 1H), 3.16 (t, J=12 Hz, 1H), 3.71 (m, 1H), 3.88 (d, J=12 Hz, 1H), 4.21 (br, 1H), 6.26 (tbr, 1H), 7.22 (d, J=9 Hz, 2H), 7.47 (d, J=9 Hz, 2H), 8.55 (d, J=9 Hz, 2H).

1. customThe reaction was quenched by addition of water
2. customThe organic layer was isolated
3. extractionthe aqueous layer was extracted with EtOAc for 4 times
4. concentrationThe combined organic layer was concentrated under vacuo
5. customwas further purified by flash chromatography (EtOAc:Hex/1:1)