Tetrabutylammonium Fluoride → (2-(Cyclopentyl(methoxy)methyl)-5-(trifluoromethyl)phenyl)methanol

HRID 2075034ノート

反応式

HRID 2075034 の反応式
[CH:1]1([CH:6]([O:26][CH3:27])[C:7]2[CH:21]=[CH:20][C:19]([C:22]([F:25])([F:24])[F:23])=[CH:18][C:8]=2[CH2:9][O:10][Si](C(C)(C)C)(C)C)[CH2:5][CH2:4][CH2:3][CH2:2]1.CCCC[N+](CCCC)(CCCC)CCCC.[F-]>C1COCC1>[CH:1]1([CH:6]([O:26][CH3:27])[C:7]2[CH:21]=[CH:20][C:19]([C:22]([F:25])([F:24])[F:23])=[CH:18][C:8]=2[CH2:9][OH:10])[CH2:5][CH2:4][CH2:3][CH2:2]1

参加物

4

反応物 2

HCID 2724141Tetrabutylammonium FluorideHCID 58968676(2-(Cyclopentyl(methoxy)methyl)-5-(trifluoromethyl)benzyloxy)(tert-butyl)dimethylsilane

生成物 1

HCID 58968669(2-(Cyclopentyl(methoxy)methyl)-5-(trifluoromethyl)phenyl)methanol収率 81.5%

試薬・触媒・溶媒 1

HCID 8028Tetrahydrofuran溶媒2 回

実験手順

To a solution of (2-(cyclopentyl(methoxy)methyl)-5-(trifluoromethyl)benzyloxy)(tert-butyl)-dimethylsilane (120 mg, 0.298 mmol) in THF at room temperature was added TBAF in THF (1.0M, 0.45 mL, 0.45 mmol). The mixture was stirred at room temperature overnight. Solvent was removed and the residue was purified by chromatography over 12+S Biotage silica column (eluted with 0-20% ethyl acetate in hexane) to afford the title compound as a colorless oil (70 mg, 81%). 1H NMR (400 MHz, CDCl3) δ ppm 1.05-1.16 (m, 1H) 1.23-1.35 (m, 1H) 1.38-1.69 (m, 5H) 1.81-1.91 (m, 1H) 2.19-2.33 (m, 1H) 2.92-2.99 (m, 1H) 3.17 (s, 3H) 4.21 (d, J=8.71 Hz, 1H) 4.80 (s, 2H) 7.47 (d, J=7.88 Hz, 1H) 7.54 (d, J=7.88 Hz, 1H) 7.69 (s, 1H). The racemic mixture was separated by chiral chromatography using preparative HPLC (Column: ChiralPak AD; Dimension: 5 cm×50 cm; Mobile phase: 98/2 heptane/ethanol, Flow rate: 120 mL/minutes). The expected preparative retention times for the two enantiomers were 15 minutes (Enantiomer 1) and 20 minutes (Enantiomer 2). Enantiomer 1: 1H NMR (400 MHz, CDCl3) δ ppm 1.05-1.17 (m, 1H) 1.26-1.37 (m, 1H) 1.42-1.72 (m, 5H) 1.83-1.92 (m, 1H) 2.23-2.33 (m, 1H) 2.38-2.47 (m, 1H) 3.18 (s, 3H) 4.20 (d, J=8.30 Hz, 1H) 4.82 (d, J=3.73 Hz, 2H) 7.47 (d, J=8.30 Hz, 1H) 7.55 (d, J=7.88 Hz, 1H) 7.69 (s, 1H). Enantiomer 2: 1H NMR (400 MHz, CDCl3) δ ppm 1.05-1.17 (m, 1H) 1.28-1.36 (m, 1H) 1.42-1.71 (m, 5H) 1.81-1.93 (m, 1H) 2.22-2.35 (m, 1H) 2.36-2.48 (m, 1H) 3.18 (s, 3H) 4.20 (d, J=8.71 Hz, 1H) 4.82 (d, J=3.73 Hz, 2H) 7.47 (d, J=8.30 Hz, 1H) 7.55 (d, J=8.30 Hz, 1H) 7.69 (s, 1H).

後処理

  1. customSolvent was removed
  2. customthe residue was purified by chromatography over 12+S Biotage silica column (eluted with 0-20% ethyl acetate in hexane)

出典と根拠

ORDレコード
ord-7dfcb9cf1257426cab889c8ae2823345
出典データセット
uspto-grants-2011_04
特許番号
US07919506B2

反応ノート

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