Ethyl bromoacetate → HCID 69871272、化合物

反応式

[CH2:1]([C:4]1[CH:9]=[C:8]([O:10][CH2:11][CH2:12][C:13]2[N:14]=[C:15]([C:19]3[CH:24]=[CH:23][C:22]([C:25]4[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=4)=[CH:21][CH:20]=3)[O:16][C:17]=2[CH3:18])[CH:7]=[CH:6][C:5]=1[OH:31])[CH2:2][CH3:3].Br[CH2:33][C:34]([O:36][CH2:37][CH3:38])=[O:35].C(=O)([O-])[O-].[Cs+].[Cs+]>CN(C=O)C>[CH2:37]([O:36][C:34](=[O:35])[CH2:33][O:31][C:5]1[CH:6]=[CH:7][C:8]([O:10][CH2:11][CH2:12][C:13]2[N:14]=[C:15]([C:19]3[CH:20]=[CH:21][C:22]([C:25]4[CH:26]=[CH:27][CH:28]=[CH:29][CH:30]=4)=[CH:23][CH:24]=3)[O:16][C:17]=2[CH3:18])=[CH:9][C:4]=1[CH2:1][CH2:2][CH3:3])[CH3:38]

参加物

反応条件

温度: 55 °C

実験手順

A mixture of 2-propyl-4-[2-(5-methyl-2-biphenyl-4-yl-oxazole-4-yl)ethoxy]phenol (0.90 mmol) (see Ex. 60, part B), ethyl 2-bromoethanoate (2.25 mmol) and cesium carbonate (0.45 g, 1.38 mmol) in anhydrous DMF (4 mL) was heated for 24 h at 55° C. The mixture was concentrated in vacuo, and the residue was partitioned between ethyl acetate (50 mL) and water (40 mL), washed with brine, dried (Na2SO4), and removed in vacuo to give a crude oil which was purified using radial chromatography eluting with 2% ethyl acetate/dichloromethane to give 2-{4-[2-(2-biphenyl-4-yl-5-methyloxazol-4-yl)ethoxy]-2-propylphenoxy}ethanoic acid ethyl ester, 1H NMR (400 MHz, CDCl3) δ8.05 (d, J=8.3 Hz, 2H), 7.67 (d, J=8.3 Hz, 2H), 7.62 (d, J=8.3 Hz, 2H), 7.44 (t, J=7.5 Hz, 2H), 7.36 (t, J=7.3 Hz, 1H), 6.72 (brs, 1H), 6.64 (brs, 2H), 4.59 (s, 2H), 4.54 (q, J=7.3 Hz, 2H), 4.20 (t, J=6.6 Hz, 2H), 2.97 (t, J=6.8 Hz, 2H), 2.58-2.61 (m, 2H), 2.38 (s, 3H), 1.61 (sextet, J=7.3 Hz, 2H), 1.27 (t, J=7.3 Hz, 3H), 0.93 (t, J=7.3 Hz, 3H).