Tetrabutylammonium Fluoride → 5-Ethynyl-1H-indole

HRID 340253Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 340253
C([Si]([C:8]#[C:9][C:10]1[CH:11]=[C:12]2[C:16](=[CH:17][CH:18]=1)[NH:15][CH:14]=[CH:13]2)(CC)CC)C.[F-].C([N+](CCCC)(CCCC)CCCC)CCC>C1COCC1>[C:9]([C:10]1[CH:11]=[C:12]2[C:16](=[CH:17][CH:18]=1)[NH:15][CH:14]=[CH:13]2)#[CH:8]

Komponenten

4

Edukt 2

HCID 2724141Tetrabutylammonium FluorideHCID 668932335-[(Triethylsilyl)ethynyl]-1H-indole

Produkt 1

HCID 178425855-Ethynyl-1H-indole

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

To a stirred solution of 5-((triethylsilyl)ethynyl)-1H-indole (from the previous step) in THF (0.2 M) cooled at 0° C. was treated with a solution (0.5 eq.) of tetrabutylammonium fluoride in a dropwise fashion. The reaction mixture turned black and was continued to stir for 30 minutes before warming up to rt. TLC showed full conversion. The reaction was quenched with water and was extracted with diethylether. Combined organic layers were dried over anhydrous Na2SO4 and concentrated using rotary evaporator with minim heating. Chromatography (silica gel, diethylether) afforded the product 5-ethynyl-1H-indole as colorless oil.

Aufarbeitung

  1. customThe reaction was quenched with water
  2. extractionwas extracted with diethylether
  3. dry with materialCombined organic layers were dried over anhydrous Na2SO4
  4. concentrationconcentrated
  5. customevaporator with minim
  6. temperatureheating

Quellen und Nachweise

ORD-Eintrag
ord-9e541765ed964fadaf928b3a44be6293
Quelldatensatz
uspto-grants-2014_11
Patentnummer
US08895577B2

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