Water → Pyrrolidine-1,2-dicarboxylic acid 2-{2-[7-(2-bromo-acetyl)-dibenzofuran-3-yl]-2-oxo-ethyl}ester 1-tert-butyl ester

HRID 71909

Reaktionsgleichung

Reaktionsgleichung von HRID 71909
[C:1]([O:5][C:6]([N:8]1[CH2:12][CH2:11][CH2:10][CH:9]1[C:13]([O:15][CH2:16][C:17]([C:19]1[CH:20]=[CH:21][C:22]2[C:26]3[CH:27]=[CH:28][C:29](Br)=[CH:30][C:25]=3[O:24][C:23]=2[CH:32]=1)=[O:18])=[O:14])=[O:7])([CH3:4])([CH3:3])[CH3:2].C([Sn](CCCC)(CCCC)[CH:38]=[CH:39][O:40]CC)CCC.O.C1C(=O)N([Br:59])C(=O)C1>O1CCOCC1.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[C:1]([O:5][C:6]([N:8]1[CH2:12][CH2:11][CH2:10][CH:9]1[C:13]([O:15][CH2:16][C:17]([C:19]1[CH:20]=[CH:21][C:22]2[C:26]3[CH:27]=[CH:28][C:29]([C:39](=[O:40])[CH2:38][Br:59])=[CH:30][C:25]=3[O:24][C:23]=2[CH:32]=1)=[O:18])=[O:14])=[O:7])([CH3:3])([CH3:4])[CH3:2]

Komponenten

7

Edukt 4

HCID 962WaterHCID 67184N-bromobutanimideHCID 2763294(Z)-1-Ethoxy-2-(tributylstannyl)etheneHCID 66621169Pyrrolidine-1,2-dicarboxylic acid 2-[2-(7-bromo-dibenzofuran-3-yl)-2-oxo-ethyl] ester 1-tert-butyl ester

Produkt 1

HCID 72338318Pyrrolidine-1,2-dicarboxylic acid 2-{2-[7-(2-bromo-acetyl)-dibenzofuran-3-yl]-2-oxo-ethyl}ester 1-tert-butyl esterAusbeute 75,3 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 178418476HCID 178418476, VerbindungKatalysatorHCID 312751,4-DioxaneLösungsmittel

Reaktionsbedingungen

Temperatur
80 °C

Versuchsvorschrift

To the solution of Pyrrolidine-1,2-dicarboxylic acid 2-[2-(7-bromo-dibenzofuran-3-yl)-2-oxo-ethyl]ester 1-tert-butyl ester (250 mg, 0.5 mmol) and tributyl(ethoxyvinyl)stannane (188 μl, 0.55 mmol) in dioxane (3.3 ml) was added PdCl2(PPh3)2 (15 mg). The mixture was heated at 80° C. for 16 hours and was cooled to 0° C. Water (1.1 ml) was added, followed by slow addition of NBS (98 mg, 0.55 mmol) over 5 minutes period. The mixture was stirred at 0° C. for additional 40 minutes, and the solvent was removed under reduced pressure. The mixture was diluted with EtOAc, and was washed with water and brine and dried with sodium sulfate. Concentration and purification by flash column chromatography (hexane/EtOAc) gave Pyrrolidine-1,2-dicarboxylic acid 2-{2-[7-(2-bromo-acetyl)-dibenzofuran-3-yl]-2-oxo-ethyl}ester 1-tert-butyl ester (205 mg).

Aufarbeitung

  1. temperaturewas cooled to 0° C
  2. customthe solvent was removed under reduced pressure
  3. additionThe mixture was diluted with EtOAc
  4. washwas washed with water and brine
  5. dry with materialdried with sodium sulfate
  6. concentrationConcentration and purification by flash column chromatography (hexane/EtOAc)

Quellen und Nachweise

ORD-Eintrag
ord-b17f54ef654d4bdf800a9b3ff3e44d59
Quelldatensatz
uspto-grants-2014_09
Patentnummer
US08822430B2

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