Ethyl bromoacetate → [7a-(4-Cyano-benzyl)-3-(3,5-Dichlorophenyl)-2-oxo-2,3,5,6,7,7a-hexahydro-benzimidazol-3a-yl]-acetic acid ethyl ester

HRID 488741Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 488741
[Cl:1][C:2]1[CH:3]=[C:4]([N:9]2[C:13]3=[CH:14][CH2:15][CH2:16][CH2:17][C:12]3([CH2:18][C:19]3[CH:26]=[CH:25][C:22]([C:23]#[N:24])=[CH:21][CH:20]=3)[NH:11][C:10]2=[O:27])[CH:5]=[C:6]([Cl:8])[CH:7]=1.[H-].[Na+].Br[CH2:31][C:32]([O:34][CH2:35][CH3:36])=[O:33]>CN(C=O)C>[CH2:35]([O:34][C:32](=[O:33])[CH2:31][C:13]12[CH2:14][CH2:15][CH2:16][CH2:17][C:12]1([CH2:18][C:19]1[CH:20]=[CH:21][C:22]([C:23]#[N:24])=[CH:25][CH:26]=1)[NH:11][C:10](=[O:27])[N:9]2[C:4]1[CH:5]=[C:6]([Cl:8])[CH:7]=[C:2]([Cl:1])[CH:3]=1)[CH3:36]

Komponenten

5

Edukt 3

HCID 7748Ethyl bromoacetateHCID 24758Sodium hydrideHCID 104534514-[1-(3,5-Dichlorophenyl)-2-oxo-1,2,3,4,5,6-hexahydro-benzimidazol-3a-ylmethyl]benzonitrile

Produkt 1

HCID 69786744[7a-(4-Cyano-benzyl)-3-(3,5-Dichlorophenyl)-2-oxo-2,3,5,6,7,7a-hexahydro-benzimidazol-3a-yl]-acetic acid ethyl ester

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel2×

Versuchsvorschrift

4-[1-(3,5-Dichlorophenyl)-2-oxo-1,2,3,4,5,6-hexahydro-benzimidazol-3a-ylmethyl]benzonitrile (150 mg) (0.38 mmol) in DMF (5 ml) was carefully dropped on a suspension of NaH 60% (18.2 mg) (1.2 eq) in DMF (5 ml) at RT. The reaction mixture was stirred for 1 h at RT, then ethyl bromoacetate (0.052 ml) (1.2 eq) was added. After one night, the reaction mixture was poured on water and extracted with tBuOMe. The organic layer was washed with water, dried over Na2SO4 and concentrated. The residue was purified on SiO2 chromatography (eluent EtOAc/cyclohexane—2/8) to give [7a-(4-Cyano-benzyl)-3-(3,5-Dichlorophenyl)-2-oxo-2,3,5,6,7,7a-hexahydro-benzimidazol-3a-yl]-acetic acid ethyl ester (46.5 mg) as a white solid. 1H NMR (CDCl3): 7.55 (2H, d), 7.25 (2H, d), 7.1 (1H, m), 6.8 (2H, m), 5.0 (1H, m), 4.45 (1H, d), 4.2 (2H, q), 3.75 (1H, d), 3.05 (1H, d), 2.90 (1H, d), 2.5-2.1 (2H, m), 2.1-1.8 (4H, m), 1.25 (3H, t).

Aufarbeitung

  1. waitAfter one night
  2. additionthe reaction mixture was poured on water
  3. extractionextracted with tBuOMe
  4. washThe organic layer was washed with water
  5. dry with materialdried over Na2SO4
  6. concentrationconcentrated
  7. customThe residue was purified on SiO2 chromatography (eluent EtOAc/cyclohexane—2/8)

Quellen und Nachweise

ORD-Eintrag
ord-02b345ace84b4483aec5f737fb316f54
Quelldatensatz
uspto-grants-2005_12
Patentnummer
US06974815B2

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