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

HRID 30855

Reaction equation

HRID 30855 reaction equation
[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

Participants

6

Reactant 4

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

Product 1

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

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

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).

Workup

  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

Sources & evidence

ORD record
ord-02b3ab5fc2254a91a617c8d84fbf65a8
Source dataset
uspto-grants-2008_09
Patent number
US07423156B2

Linked notes

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