Potassium Carbonate → 3-Benzyl 1-methyl 4-(1-(2-(tert-butyldimethylsilyloxy)ethyl)-4-(dibutylcarbamoyl)-1H-imidazol-2-yl)isophthalate

HRID 529016Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 529016
[CH2:1]([N:5]([CH2:33][CH2:34][CH2:35][CH3:36])[C:6]([C:8]1[N:9]=[C:10]([C:13]2[CH:22]=[CH:21][C:16]([C:17]([O:19][CH3:20])=[O:18])=[CH:15][C:14]=2[C:23]([O:25][CH2:26][C:27]2[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=2)=[O:24])[NH:11][CH:12]=1)=[O:7])[CH2:2][CH2:3][CH3:4].C([O-])([O-])=O.[K+].[K+].Br[CH2:44][CH2:45][O:46][Si:47]([C:50]([CH3:53])([CH3:52])[CH3:51])([CH3:49])[CH3:48]>CN(C=O)C.CC(OC)(C)C>[Si:47]([O:46][CH2:45][CH2:44][N:11]1[CH:12]=[C:8]([C:6](=[O:7])[N:5]([CH2:1][CH2:2][CH2:3][CH3:4])[CH2:33][CH2:34][CH2:35][CH3:36])[N:9]=[C:10]1[C:13]1[CH:22]=[CH:21][C:16]([C:17]([O:19][CH3:20])=[O:18])=[CH:15][C:14]=1[C:23]([O:25][CH2:26][C:27]1[CH:28]=[CH:29][CH:30]=[CH:31][CH:32]=1)=[O:24])([C:50]([CH3:53])([CH3:52])[CH3:51])([CH3:49])[CH3:48]

Komponenten

6

Edukt 3

HCID 11430Potassium CarbonateHCID 3608067(2-Bromoethoxy)-tert-butyldimethylsilaneHCID 178449065HCID 178449065, Verbindung

Produkt 1

HCID 710624493-Benzyl 1-methyl 4-(1-(2-(tert-butyldimethylsilyloxy)ethyl)-4-(dibutylcarbamoyl)-1H-imidazol-2-yl)isophthalateAusbeute 58,3 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 6228DimethylformamideLösungsmittelHCID 15413tert-Butyl methyl etherLösungsmittel

Versuchsvorschrift

To a stirred solution of 3-benzyl 1-methyl 4-(4-(dibutylcarbamoyl)-1H-imidazol-2-yl)isophthalate (190 mg, 0.40 mmol) in dry DMF (5 mL) was added K2CO3 (160 mg, 1.16 mmol) and (2-bromoethoxy)(tert-butyl)dimethylsilane (92 mg, 0.38 mmol) at 0° C. The mixture was allowed to warm to room temperature and heated at 50° C. for 24 h. The reaction mixture was cooled to 0° C., diluted with MTBE and quenched with water. The organic layer was separated and the aqueous layer was extracted with MTBE (3×). The combined organic layer was dried over Na2SO4 and concentrated in vacuo to provide crude product. The crude material was purified by flash chromatography (gradient 10 to 30% ethylacetate/hexane) to provide the title compound (144 mg, 54%). 1H NMR (CD3OD) 8.66 (d, J=1.6 Hz, 1H), 8.30 (dd, J=8.0, 2.0 Hz, 1H), 7.70 (d, J=8.0 Hz, 1H), 7.65 (s, 1H), 7.38-7.29 (m, 5H), 5.20 (s, 2H), 3.99 (s, 3H), 3.83-3.82 (m, 2H), 3.77 (t, J=5.0 Hz, 2H), 3.70 (t, J=5.0 Hz, 2H), 3.49 (br s, 2H), 1.70-1.55 (m, 4H), 1.45-1.26 (m, 4H), 1.05-0.85 (m, 6H), 0.83 (s, 9H), 0.03 (s, 6H); MS(ESI+) m/z 650.2 (M+H)+.

Aufarbeitung

  1. temperatureheated at 50° C. for 24 h
  2. temperatureThe reaction mixture was cooled to 0° C.
  3. customquenched with water
  4. customThe organic layer was separated
  5. extractionthe aqueous layer was extracted with MTBE (3×)
  6. dry with materialThe combined organic layer was dried over Na2SO4
  7. concentrationconcentrated in vacuo
  8. customto provide crude product
  9. customThe crude material was purified by flash chromatography (gradient 10 to 30% ethylacetate/hexane)

Quellen und Nachweise

ORD-Eintrag
ord-4314c0b8e0464452a89cb7808c827818
Quelldatensatz
uspto-grants-2016_05
Patentnummer
US09346795B2

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