Cesium carbonate → Ethyl 6-(benzenesulphonylmethyl)-2-[2-(t-butoxycarbonyl)aminoethoxy]-3-(furan-3-yl)benzoate

HRID 2177693Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2177693
[C:1]([O:5][C:6]([NH:8][CH2:9][CH2:10]Br)=[O:7])([CH3:4])([CH3:3])[CH3:2].[C:12]1([S:18]([CH2:21][C:22]2[C:27]([C:28]([O:30][CH2:31][CH3:32])=[O:29])=[C:26]([OH:33])[C:25]([C:34]3[CH:38]=[CH:37][O:36][CH:35]=3)=[CH:24][CH:23]=2)(=[O:20])=[O:19])[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1.C(=O)([O-])[O-].[Cs+].[Cs+]>CN(C=O)C>[C:12]1([S:18]([CH2:21][C:22]2[C:27]([C:28]([O:30][CH2:31][CH3:32])=[O:29])=[C:26]([O:33][CH2:10][CH2:9][NH:8][C:6]([O:5][C:1]([CH3:4])([CH3:3])[CH3:2])=[O:7])[C:25]([C:34]3[CH:38]=[CH:37][O:36][CH:35]=3)=[CH:24][CH:23]=2)(=[O:20])=[O:19])[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1

Komponenten

5

Edukt 3

HCID 10796Cesium carbonateHCID 4103526tert-Butyl N-(2-bromoethyl)carbamateHCID 67107629Ethyl 6-benzenesulphonylmethyl-3-(furan-3-yl)-2-hydroxybenzoate2×

Produkt 1

HCID 67107565Ethyl 6-(benzenesulphonylmethyl)-2-[2-(t-butoxycarbonyl)aminoethoxy]-3-(furan-3-yl)benzoateAusbeute 45,2 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel2×

Versuchsvorschrift

A solution of 2-[N-(t-butoxycarbonyl)amino]ethyl bromide (0.032 g) in DMF (0.5 ml) was added to a stirred cooled solution of ethyl 6-(benzenesulphonylmethyl)-3-(furan-3-yl)-2-hydroxybenzoate (Intermediate 36, 0.05 g) and cesium carbonate (0.065 g) in DMF (0.5 ml) at 0° C. The resultant mixture was allowed to warm to room temperature, stirred for 3 hours then partitioned between ethyl acetate and water. The organic layer was washed with water, dried (MgSO4) and filtered. The filtrate was evaporated to dryness and the residue was purified by chromatography on silica, eluting with a mixture of ethyl acetate and cyclohexane with a gradient of 20-25% to give ethyl 6-(benzenesulphonylmethyl)-2-[2-(t-butoxycarbonyl)amino-ethoxy]-3-(furan-3-yl)-benzoate (0.031 g) as a colourless gum.

Aufarbeitung

  1. customthen partitioned between ethyl acetate and water
  2. washThe organic layer was washed with water
  3. dry with materialdried (MgSO4)
  4. filtrationfiltered
  5. customThe filtrate was evaporated to dryness
  6. customthe residue was purified by chromatography on silica
  7. washeluting with a mixture of ethyl acetate and cyclohexane with a gradient of 20-25%

Quellen und Nachweise

ORD-Eintrag
ord-443c723fcef444ccbc4eb99a34c1d478
Quelldatensatz
uspto-grants-2015_06
Patentnummer
US09067905B2

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