Carbon Dioxide → 1-{[(1,1-Dimethylethyl)oxy]carbonyl}-4-fluoro-2,3-dihydro-1H-indole-7-carboxylic acid

反応式

[Li]C(C)(C)C.Br[C:7]1[CH:8]=[CH:9][C:10]([F:23])=[C:11]2[C:15]=1[N:14]([C:16]([O:18][C:19]([CH3:22])([CH3:21])[CH3:20])=[O:17])[CH2:13][CH2:12]2.[C:24](=[O:26])=[O:25]>C1COCC1>[CH3:20][C:19]([O:18][C:16]([N:14]1[C:15]2[C:11](=[C:10]([F:23])[CH:9]=[CH:8][C:7]=2[C:24]([OH:26])=[O:25])[CH2:12][CH2:13]1)=[O:17])([CH3:22])[CH3:21]

参加物

実験手順

A solution of 1.6 M tert-BuLi (1.2 mL, 1.92 mmol) was added to a solution of 1,1-dimethylethyl 7-bromo-4-fluoro-2,3-dihydro-1H-indole-1-carboxylate (260 mg, 0.92 mmol) in THF (52 mL) at −78 (bath temp). The reaction was stirred for 5 min, and dry ice (CO2) powder was added. The reaction was stirred for 10 min, and was allowed to warm slowly to room temperature. The reaction mixture was washed with EtOAc, and the organic layer was evaporated. The crude product was purified by flash chromatography, giving the title compound.