Iodoethane → HCID 86681545、化合物

反応式

[CH:1]1([NH:7][CH2:8][CH:9]([O:11][C:12](=[O:19])[C:13]2[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=2)[CH3:10])[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1.C([O-])([O-])=O.[K+].[K+].[CH2:26](I)[CH3:27]>ClCCCl>[C:12]([O:11][CH:9]([CH3:10])[CH2:8][N:7]([CH:1]1[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1)[CH2:26][CH3:27])(=[O:19])[C:13]1[CH:14]=[CH:15][CH:16]=[CH:17][CH:18]=1

参加物

反応条件

温度: 50 °C

実験手順

To a stirred solution of benzoic acid 2-cyclohexylamino-1-methyl-ethyl ester (1.0 g, 3.8 mmol) in DCE (20 mL) were added successively K2CO3 (2.11 g, 15.2 mmol) and ethyl iodide (1.8 mL, 22 mmol). The resulting mixture was heated at 50° C. for 16 hours in a sealed tube. Ethyl iodide (1.8 mL) was again added and the reaction mixture heated at 60° C. for another 24 hours. The reaction mixture was filtered and washed 5% methanol-DCM. The filtrate was concentrated and the crude material was purified by Combiflash® chromatography eluting with 6-7% methanol/DCM to provide 1-(cyclohexyl(ethyl)amino)propan-2-yl benzoate. Yield: 1.04 g (94.70%). 1H NMR (DMSO-d6) δ 7.95 (d, J=7 Hz, 2 H), 7.64 (t, J=7 Hz, 1 H), 7.52 (t, J=8 Hz, 2 H), 5.08-5.04 (m, 1 H), 2.68-2.62 (m, 1 H), 2.55-2.40 (m, 4 H), 1.70-1.53 (m, 5 H), 1.26 (d, J=6 Hz, 3 H), 1.19-1.07 (m, 5 H), 0.93 (t, J=7 Hz, 3 H). LCMS: m/z=290.4 [M+H], RT=3.93 min, (Column: Y, Program: P1)