Lithium hydroxide, monohydrate → 1-(5-Chloro-4'-methyl-6-(2,2,2-trifluoroethoxy)biphenyl-3-yl)cyclobutane carboxylic acid
反応式
[Cl:1][C:2]1[CH:3]=[C:4]([C:21]2([C:25]([O:27]CC)=[O:26])[CH2:24][CH2:23][CH2:22]2)[CH:5]=[C:6]([C:14]2[CH:19]=[CH:18][C:17]([CH3:20])=[CH:16][CH:15]=2)[C:7]=1[O:8][CH2:9][C:10]([F:13])([F:12])[F:11].O.[OH-].[Li+]>CO.C1COCC1.O>[Cl:1][C:2]1[CH:3]=[C:4]([C:21]2([C:25]([OH:27])=[O:26])[CH2:22][CH2:23][CH2:24]2)[CH:5]=[C:6]([C:14]2[CH:19]=[CH:18][C:17]([CH3:20])=[CH:16][CH:15]=2)[C:7]=1[O:8][CH2:9][C:10]([F:13])([F:12])[F:11]参加物
4
実験手順
A mixture of ethyl 1-(5-chloro-4′-methyl-6-(2,2,2-trifluoroethoxy)biphenyl-3-yl)cyclobutanecarboxylate (300 mg, 0.70 mmol) and lithium hydroxide monohydrate (280 mg, 11.6 mmol) in a MeOH/THF/Water solvent mixture (10 ml/10 ml/10/ml) was stirred for 3 h at room temperature. After completion of the reaction, the volatiles were removed under reduced pressure. The residue was diluted with water, acidified with 5% HCl solution and extracted with ethyl acetate (2×25 mL). The combined organic layers were washed with water, dried with Na2SO4, filtered and concentrated under reduced pressure. The residue was purified by Flash Column Chromatography to give 1-(5-chloro-4′-methyl-6-(2,2,2-trifluoroethoxy)biphenyl-3-yl)cyclobutane carboxylic acid (185 mg, 66%) as white solid. 1HNMR (CDCl3): 7.42 (m, 2H); 7.32 (s, 1H), 7.23 (d, 2H), 7.18 (s, 1H), 3.87 (q, 2H); 2.85 (m, 2H), 2.54 (m, 2H), 2.39 (s, 3H), 2.12 (m, 1H); 1.83 (m, 1H).