2,2,2-Trichloroethyl chloroformate → 1-[(3SR,4RS)-4-(3,4-Dichloro-phenyl)-pyrrolidin-3-yl]-ethanone

HRID 1158643Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1158643
C([N:8]1[CH2:12][CH:11]([C:13]2[CH:18]=[CH:17][C:16]([Cl:19])=[C:15]([Cl:20])[CH:14]=2)[CH:10]([C:21](=[O:23])[CH3:22])[CH2:9]1)C1C=CC=CC=1.ClC(OCC(Cl)(Cl)Cl)=O>CC#N>[Cl:20][C:15]1[CH:14]=[C:13]([CH:11]2[CH2:12][NH:8][CH2:9][CH:10]2[C:21](=[O:23])[CH3:22])[CH:18]=[CH:17][C:16]=1[Cl:19]

Komponenten

4

Edukt 2

HCID 870632,2,2-Trichloroethyl chloroformateHCID 669997301-[(3RS,4SR)-1-Benzyl-4-(3,4-dichloro-phenyl)-pyrrolidin-3-yl]-ethanone

Produkt 1

HCID 671317481-[(3SR,4RS)-4-(3,4-Dichloro-phenyl)-pyrrolidin-3-yl]-ethanoneAusbeute 63,2 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6342AcetonitrileLösungsmittel

Versuchsvorschrift

To a solution of 1-[(3SR,4RS)-1-benzyl-4-(3,4-dichloro-phenyl)-pyrrolidin-3-yl]-ethanone 4.00 g (9.20 mmol) dissolved in CH3CN (50 mL) was added 2.48 mL (18.40 mmol) of 2,2,2-trichloroethyl chloroformate and stirring was continued for 3 hours at RT. Volatiles were removed under vacuo, and the residue was dissolved in AcOH (30 mL) before a total of 1.5 g of Zn dust was added portion wise. After three hours at RT, the reaction mixture was filtered on celite, the solvent removed under vacuo, followed by extraction with EtOAc/aq. NaHCO3 (basic pH). The organic phases were dried on Na2SO4 and column chromatography (SiO2, CH2Cl2/MeOH 9:1 to 8:2) yielded 1.50 g (63%) of the title compound as a colorless oil. ES-MS m/e: 258.0 (M+H+).

Aufarbeitung

  1. customVolatiles were removed under vacuo
  2. dissolutionthe residue was dissolved in AcOH (30 mL) before a total of 1.5 g of Zn dust
  3. additionwas added portion wise
  4. waitAfter three hours at RT
  5. filtrationthe reaction mixture was filtered on celite
  6. customthe solvent removed under vacuo
  7. extractionfollowed by extraction with EtOAc/aq
  8. dry with materialThe organic phases were dried on Na2SO4 and column chromatography (SiO2, CH2Cl2/MeOH 9:1 to 8:2)

Quellen und Nachweise

ORD-Eintrag
ord-ef3f0cf6550c4367b0ad176540b72791
Quelldatensatz
uspto-grants-2010_10
Patentnummer
US07812021B2

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