Water → 3-(5-Benzyloxy-indol-1-yl)-hexanoic acid ethyl ester

HRID 23998

Reaktionsgleichung

Reaktionsgleichung von HRID 23998
[CH2:1]([O:8][C:9]1[CH:10]=[C:11]2[C:15](=[CH:16][CH:17]=1)[NH:14][CH:13]=[CH:12]2)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[H-].[Na+].[CH2:20]([O:22][C:23](=[O:30])[CH2:24][CH:25](Br)[CH2:26][CH2:27][CH3:28])[CH3:21].O>CN(C=O)C>[CH2:20]([O:22][C:23](=[O:30])[CH2:24][CH:25]([N:14]1[C:15]2[C:11](=[CH:10][C:9]([O:8][CH2:1][C:2]3[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=3)=[CH:17][CH:16]=2)[CH:12]=[CH:13]1)[CH2:26][CH2:27][CH3:28])[CH3:21]

Komponenten

6

Edukt 4

HCID 962WaterHCID 146245-BenzyloxyindoleHCID 24758Sodium hydrideHCID 22570372Ethyl-beta-bromocaproate

Produkt 1

HCID 674280143-(5-Benzyloxy-indol-1-yl)-hexanoic acid ethyl esterAusbeute 40 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel3×

Versuchsvorschrift

A solution of 5-benzyloxyindole (5.00 g, 22.4 mmol) in DMF (20 mL) was added dropwise to a stirred solution of sodium hydride (0.91 g, 38.1 mmol) in DMF (50 mL) at 0° C. and stirred for 20 minutes. Ethyl-β-bromocaproate (5.59 g, 26.9 mmol) in DMF (20 mL) was added and the reaction was stirred at room temperature overnight. The reaction was then poured into cold H2O (150 mL) and extracted with ethyl acetate (3×50 mL), dried over magnesium sulfate and concentrated. The residue was purified by flash chromatography on silica gel (40% ethyl acetate in hexane) to give the title compound as oil (40% yield). 1H NMR (CDCl3) δ 7.47 (d, 2H, J=7.2 Hz), 7.38 (t, 2H, J=7.1 Hz), 7.32 (d, 2H, J=8.8 Hz), 7.12 (dd, 2H, J=2.4, 13.7 Hz), 6.94 (dd, 1H, J=2.4, 10.2 Hz), 6.44 (d, 1H, J=3.1 Hz), 5.09 (s, 2H), 4.79 (m, 1H), 3.98 (q, 2H, J=7.1 Hz), 2.80 (m, 2H), 1.90 (m, 2H), 1.25 (m, 2H), 1.07 (t, 3H, J=7.2 Hz), 0.86 (t, 3H, J=7.3 Hz).

Aufarbeitung

  1. stirringthe reaction was stirred at room temperature overnight
  2. extractionextracted with ethyl acetate (3×50 mL)
  3. dry with materialdried over magnesium sulfate
  4. concentrationconcentrated
  5. customThe residue was purified by flash chromatography on silica gel (40% ethyl acetate in hexane)

Quellen und Nachweise

ORD-Eintrag
ord-0b7ab1f327f54d7dbf3b233d518031c2
Quelldatensatz
uspto-grants-2005_02
Patentnummer
US06855722B2

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