Acetonitrile → Trifluoroacetic acid

HRID 887691Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 887691
C(OC([N:8]1[CH2:13][CH2:12][CH:11]([C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][C:15]=2[CH2:20][O:21]S(C2C=CC(C)=CC=2)(=O)=O)[CH2:10][CH2:9]1)=O)(C)(C)C.CC#N.C([O-])([O-])=O.[K+].[K+].[F:41][C:42]1[CH:47]=[C:46]([F:48])[CH:45]=[C:44]([F:49])[C:43]=1O.[C:51]([OH:57])([C:53]([F:56])([F:55])[F:54])=[O:52]>CC(O)=O.O>[F:41][C:42]1[CH:47]=[C:46]([F:48])[CH:45]=[C:44]([F:49])[C:43]=1[O:21][CH2:20][C:15]1[CH:16]=[CH:17][CH:18]=[CH:19][C:14]=1[CH:11]1[CH2:10][CH2:9][NH:8][CH2:13][CH2:12]1.[C:51]([OH:57])([C:53]([F:56])([F:55])[F:54])=[O:52]

Komponenten

8

Edukt 5

HCID 6342AcetonitrileHCID 6422Trifluoroacetic acidHCID 11430Potassium CarbonateHCID 5199742,4,6-TrifluorophenolHCID 462129884-[2-(Toluene-4-sulfonyloxymethyl)phenyl]piperidine-1-carboxylic acid t-butyl ester

Produkt 2

HCID 6422Trifluoroacetic acidAusbeute 242,6 %HCID 46189893Ampreloxetine

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 21899381Acetic acid--water (1/1)Lösungsmittel

Reaktionsbedingungen

Temperatur
50 °C

Versuchsvorschrift

4-[2-(Toluene-4-sulfonyloxymethyl)phenyl]piperidine-1-carboxylic acid t-butyl ester (2.1 g, 4.7 mmol, 1.0 eq.) was dissolved in MeCN (46 mL, 890 mmol) and added to K2CO3 (1.9 g, 14 mmol, 3.0 eq.) and 2,4,6-trifluorophenol (1.0 g, 7.0 mmol, 1.5 eq.). The mixture was shaken at 50° C. overnight, then cooled to room temperature. The supernatant was separated from the K2CO3 and other solids. TFA (7 mL, 90 mmol, 20.0 eq.) was added to the supernatant and the mixture was shaken overnight at room temperature. The solution was then concentrated to yield a crude residue. The residue was dissolved in 5.0 mL 1:1 AcOH/H2O, then in an additional 2.0 mL AcOH, filtered and purified by preparative HPLC to yield the title compound as a TFA salt (1.3 g, 97.5% purity). MS m/z: [M+H]+ calcd for C18H18F3NO, 322.13. found 322.2.

Aufarbeitung

  1. temperaturecooled to room temperature
  2. customThe supernatant was separated from the K2CO3 and other solids
  3. stirringthe mixture was shaken overnight at room temperature
  4. concentrationThe solution was then concentrated
  5. customto yield a crude residue
  6. filtrationin an additional 2.0 mL AcOH, filtered
  7. custompurified by preparative HPLC

Quellen und Nachweise

ORD-Eintrag
ord-6251d9b948084d2f89ff79932a57a2da
Quelldatensatz
uspto-grants-2012_08
Patentnummer
US08247433B2

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