Triethylamine → Ethyl 3-methyl-4-((triethylsilyl)ethynyl)benzoate

HRID 1259154Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1259154
Br[C:2]1[CH:12]=[CH:11][C:5]([C:6]([O:8][CH2:9][CH3:10])=[O:7])=[CH:4][C:3]=1[CH3:13].[CH2:14]([Si:16]([CH2:21][CH3:22])([CH2:19][CH3:20])[C:17]#[CH:18])[CH3:15].C(N(CC)CC)C>CN(C=O)C.C(OCC)(=O)C.[OH-].[NH4+].[Cu]I>[CH3:13][C:3]1[CH:4]=[C:5]([CH:11]=[CH:12][C:2]=1[C:15]#[C:14][Si:16]([CH2:21][CH3:22])([CH2:19][CH3:20])[CH2:17][CH3:18])[C:6]([O:8][CH2:9][CH3:10])=[O:7]

Komponenten

8

Edukt 3

HCID 8471TriethylamineHCID 637947(Triethylsilyl)acetyleneHCID 21729626Ethyl 4-bromo-3-methylbenzoate

Produkt 1

HCID 66874679Ethyl 3-methyl-4-((triethylsilyl)ethynyl)benzoate

Reagenzien, Katalysatoren, Lösungsmittel 4

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)KatalysatorHCID 6228DimethylformamideLösungsmittelHCID 8857Ethyl AcetateLösungsmittelHCID 14923Ammonium HydroxideLösungsmittel

Versuchsvorschrift

A solution of ethyl 4-bromo-3-methylbenzoate (from the previous step) (1.0 eq.), triethyl(ethynyl)silane (1.1 eq.), trans-dichlororbis(triphenylphosphine)palladium (II) (10 mol %), copper (I) iodide (20 mol %), and triethylamine (5.0 eq.) in DMF (0.3 M) was stirred at 60° C. overnight. After cooling to ambient temperature, the reaction mixture was diluted with ethyl acetate and 10% aqueous ammonium hydroxide. The two phases were separated, and the aqueous layer was extracted twice with ethyl acetate. The combined organic layers were washed with brine, dried over anhydrous MgSO4, and concentrated en vaccuo. The crude material was purified by flash chromatography on a COMBIFLASH® system (ISCO) using 0-5% ethyl acetate in hexane to give ethyl 3-methyl-4-((triethylsilyl)ethynyl)benzoate as a yellow oil.

Aufarbeitung

  1. customThe two phases were separated
  2. extractionthe aqueous layer was extracted twice with ethyl acetate
  3. washThe combined organic layers were washed with brine
  4. dry with materialdried over anhydrous MgSO4
  5. concentrationconcentrated en vaccuo
  6. customThe crude material was purified by flash chromatography on a COMBIFLASH® system (ISCO)

Quellen und Nachweise

ORD-Eintrag
ord-8ea53eea0c3346c7825311cfedae3842
Quelldatensatz
uspto-grants-2013_06
Patentnummer
US08466167B2

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