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Triethyl borate → 3-[(tert-Butoxycarbonyl)amino]-2-(methylsulfanyl)pyrazolo[1,5-a]pyridin-7-ylboric Acid

HRID 9196
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 9196
I[C:2]1[N:7]2[N:8]=[C:9]([S:19][CH3:20])[C:10]([NH:11][C:12](=[O:18])[O:13][C:14]([CH3:17])([CH3:16])[CH3:15])=[C:6]2[CH:5]=[CH:4][CH:3]=1.C([Li])CCC.C([O:28][B:29]([O:33]CC)[O:30]CC)C.[Cl-].[NH4+]>O1CCCC1.C(OCC)(=O)C>[C:14]([O:13][C:12]([NH:11][C:10]1[C:9]([S:19][CH3:20])=[N:8][N:7]2[C:2]([O:28][B:29]([OH:33])[OH:30])=[CH:3][CH:4]=[CH:5][C:6]=12)=[O:18])([CH3:17])([CH3:16])[CH3:15]
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Komponenten

7

Edukt 4

HCID 9009Triethyl borateHCID 25517Ammonium ChlorideHCID 21984511tert-Butyl N-[7-iodo-2-methylthiopyrazolo[1,5-a]pyridin-3-yl]carbamateHCID 178418339Butyllithium

Produkt 1

HCID 219847133-[(tert-Butoxycarbonyl)amino]-2-(methylsulfanyl)pyrazolo[1,5-a]pyridin-7-ylboric Acid

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 8028
Tetrahydrofuran
Lösungsmittel
HCID 8857Ethyl AcetateLösungsmittel

Reaktionsbedingungen

Temperatur
-78 °C

Versuchsvorschrift

After dissolving tert-butyl N-(7-iodo-2-(methylsulfanyl)pyrazolo[1,5-a]pyridin-3-yl)carbamate (200 mg) in tetrahydrofuran (2 mL), the mixture was cooled to −78° C. and n-butyllithium (1.6 M; 0.66 mL) was added dropwise. The mixture was stirred for 1-hour at the same temperature, triethoxyborane (109 μL) was added and the temperature was increased to room temperature. Saturated aqueous ammonium chloride was added to the obtained reaction mixture, and extraction was performed with ethyl acetate. The obtained organic layer was washed with brine and dried over anhydrous magnesium sulfate, and the solvent was distilled off under reduced pressure to obtain the title compound (106 mg) as grayish white crystals.

Aufarbeitung

  1. additionwas added
  2. temperaturethe temperature was increased to room temperature
  3. washThe obtained organic layer was washed with brine
  4. dry with materialdried over anhydrous magnesium sulfate
  5. distillationthe solvent was distilled off under reduced pressure

Quellen und Nachweise

ORD-Eintrag
ord-f6b1679482d14db0b11eddb742d1b067
Quelldatensatz
uspto-grants-2006_08
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US07091215B2

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