Benzyl Bromide → Ethyl 2-((benzyl(cyclopentyl)amino)methyl)-2-hydroxybutanoate

HRID 914162Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 914162
[CH:1]1([NH:6][CH2:7][C:8]([OH:16])([CH2:14][CH3:15])[C:9]([O:11][CH2:12][CH3:13])=[O:10])[CH2:5][CH2:4][CH2:3][CH2:2]1.[CH2:17](Br)[C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1.C([O-])([O-])=O.[K+].[K+].CCOC(C)=O>C(#N)C>[CH2:17]([N:6]([CH2:7][C:8]([OH:16])([CH2:14][CH3:15])[C:9]([O:11][CH2:12][CH3:13])=[O:10])[CH:1]1[CH2:2][CH2:3][CH2:4][CH2:5]1)[C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1

Komponenten

6

Edukt 4

HCID 7498Benzyl BromideHCID 8857Ethyl AcetateHCID 11430Potassium CarbonateHCID 57955553Ethyl 2-((cyclopentylamino)methyl)-2-hydroxybutanoate

Produkt 1

HCID 57955651Ethyl 2-((benzyl(cyclopentyl)amino)methyl)-2-hydroxybutanoateAusbeute 77 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6342AcetonitrileLösungsmittel

Reaktionsbedingungen

Temperatur
80 °C

Versuchsvorschrift

To ethyl 2-((cyclopentylamino)methyl)-2-hydroxybutanoate (2.7 g, 12 mmol) in 50 ml of acetonitrile at room temperature, was added benzyl bromide (2.1 ml, 18 mmol) dropwise, followed by K2CO3 (5 g, 35 mmol). The reaction mixture was heated at 80° C. for 18 h. It was then diluted to EtOAc, washed by brine and water. Organic extract dried and concentrated to a residue, which was purified on silica gel column chromatographically (Hex/EtOAc=100:1 to 4:1) to give 2.9 g product (77%). [M+H] calc'd for C19H29NO3, 320. found 320.

Aufarbeitung

  1. washwashed by brine and water
  2. extractionOrganic extract
  3. customdried
  4. concentrationconcentrated to a residue, which
  5. customwas purified on silica gel column chromatographically (Hex/EtOAc=100:1 to 4:1)

Quellen und Nachweise

ORD-Eintrag
ord-0d15590e959a43d39dae2870566636f9
Quelldatensatz
uspto-grants-2011_09
Patentnummer
US08026234B2

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