Water → trans-(Trimethylsilyl)ethyl 2-(4-bromobenzoyl)cyclohexanecarboxylate

HRID 9540

Reaktionsgleichung

Reaktionsgleichung von HRID 9540
[Br:1][C:2]1[CH:18]=[CH:17][C:5]([C:6]([C@@H:8]2[CH2:13][CH2:12][CH2:11][CH2:10][C@H:9]2[C:14]([OH:16])=[O:15])=[O:7])=[CH:4][CH:3]=1.[CH3:19][Si:20]([CH3:25])([CH3:24])[CH2:21][CH2:22]O.CCN=C=NCCCN(C)C.O>C(Cl)Cl>[Br:1][C:2]1[CH:3]=[CH:4][C:5]([C:6]([C@@H:8]2[CH2:13][CH2:12][CH2:11][CH2:10][C@H:9]2[C:14]([O:16][CH2:22][CH2:21][Si:20]([CH3:25])([CH3:24])[CH3:19])=[O:15])=[O:7])=[CH:17][CH:18]=1

Komponenten

6

Edukt 4

HCID 962WaterHCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 180132-(Trimethylsilyl)ethanolHCID 2725095(1R,2R)-2-(4-bromobenzoyl)cyclohexane-1-carboxylic Acid

Produkt 1

HCID 58681290trans-(Trimethylsilyl)ethyl 2-(4-bromobenzoyl)cyclohexanecarboxylateAusbeute 37 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel2×

Versuchsvorschrift

To a solution of trans-2-(4-bromobenzoyl)cyclohexanecarboxylic acid (5.0 g, 16.07 mmol) in DCM (80 mL) was added 2-(trimethylsilyl)ethanol (2.1 g, 17.68 mmol), N,N′-dimethylamino-pyridine (98 mg, 0.80 mmol), and EDCI (4.0 g, 20.89 mmol). The resulting reaction mixture was stirred at rt for 2 days. Water was added, and the mixture was diluted with DCM. The aqueous layer was separated and extracted with DCM. The combined organic phases were washed with water and brine, dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. Silica gel chromatography (Biotage cartridge), eluting with 10% EtOAc in hexane gave trans-(trimethylsilyl)ethyl 2-(4-bromobenzoyl)cyclohexanecarboxylate (2.44 g, 37%). 1H NMR (400 MHz, CD2Cl2) δ −0.01 (s, 9H), 0.85 (m, 2H), 1.45 (m, 3H), 1.73 (m, 2H), 1.90 (m, 2H), 2.18 (m, 1H), 2.71 (m, 1H), 3.80 (m, 1H), 4.05 (m, 2H), 7.58 (d, 2H), 7.70 (d, 2H).

Aufarbeitung

  1. customThe resulting reaction mixture
  2. customThe aqueous layer was separated
  3. extractionextracted with DCM
  4. washThe combined organic phases were washed with water and brine
  5. dry with materialdried over anhydrous sodium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated under reduced pressure
  8. washSilica gel chromatography (Biotage cartridge), eluting with 10% EtOAc in hexane

Quellen und Nachweise

ORD-Eintrag
ord-91ac4de46f3e4b839aeb0ff63fe2cf3e
Quelldatensatz
uspto-grants-2006_08
Patentnummer
US07091228B2

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