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Triphenylphosphine → 4'-bromo-1'-(pyridin-2-ylmethyl)-5,6-dihydrospiro[benzo[1,2-b:5,4-b']difuran-3,3'-indol]-2'(1'H)-one

HRID 545832
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Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 545832
[Br:1][C:2]1[CH:10]=[CH:9][CH:8]=[C:7]2[C:3]=1[C:4]([C:21]1[C:22](O)=[CH:23][C:24]3[O:28][CH2:27][CH2:26][C:25]=3[CH:29]=1)([CH2:19][OH:20])[C:5](=[O:18])[N:6]2[CH2:11][C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][N:13]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OC(C)C)=O)=NC(OC(C)C)=O>O1CCOCC1>[Br:1][C:2]1[CH:10]=[CH:9][CH:8]=[C:7]2[C:3]=1[C:4]1([CH2:19][O:20][C:22]3[CH:23]=[C:24]4[C:25](=[CH:29][C:21]1=3)[CH2:26][CH2:27][O:28]4)[C:5](=[O:18])[N:6]2[CH2:11][C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][N:13]=1
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Komponenten

5

Edukt 3

HCID 11776TriphenylphosphineHCID 75555Diisopropyl diazene-1,2-dicarboxylateHCID 588725124-bromo-3-(6-hydroxy-2,3-dihydro-1-benzofuran-5-yl)-3-(hydroxymethyl)-1-(Pyridin-2-ylmethyl)-1,3-dihydro-2H-indol-2-one

Produkt 1

HCID 592634004'-bromo-1'-(pyridin-2-ylmethyl)-5,6-dihydrospiro[benzo[1,2-b:5,4-b']difuran-3,3'-indol]-2'(1'H)-oneAusbeute 37 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 312751,4-DioxaneLösungsmittel

Versuchsvorschrift

A mixture of 4-bromo-3-(6-hydroxy-2,3-dihydro-1-benzofuran-5-yl)-3-(hydroxymethyl)-1-(pyridin-2-ylmethyl)-1,3-dihydro-2H-indol-2-one (1.81 g, 3.88 mmol), triphenylphosphine (2.04 g, 7.77 mmol) and diisopropyl azodicarboxylate (1.57 g, 7.77 mmol) in anhydrous dioxane (60 mL) was heated at reflux for 16 h. After cooling down to ambient temperature, the solvent was removed in vacuo. The gummy residue was diluted with ethyl acetate (50.0 mL), washed with water (3×25.0 mL), brine (3×25.0 mL), dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated in vacuo to dryness. The residue was subjected to column chromatography eluting with ethyl acetate/hexane (80%) to give the title compound (0.64 g, 37%) as colorless solid: mp >200° C.; 1H NMR (300 MHz, DMSO-d6) δ 8.47 (d, 1H), 7.77 (dt, 1H), 7.37 (d, 1H), 7.27 (dt, 1H), 7.19-7.13 (m, 2H), 6.94 (dd, 1H), 6.61 (s, 1H), 6.33 (s, 1H), 5.08 (d, 1H), 5.03 (d, 1H), 4.93 (d, 1H), 4.74 (d, 1H), 4.48 (t, J=8.6 Hz, 2H), 2.96 (t, 2H); 13C NMR (75 MHz, DMSO-d6) δ 177.4, 162.2, 161.8, 155.3, 149.8, 145.3, 137.6, 131.0, 130.5, 126.8, 123.3, 122.2, 119.9, 119.5, 119.0, 118.1, 109.3, 92.4, 77.5, 72.5, 58.8, 45.3, 28.8; MS (ES+) m/z 451.3 (M+1).

Aufarbeitung

  1. temperaturewas heated
  2. temperatureat reflux for 16 h
  3. customthe solvent was removed in vacuo
  4. additionThe gummy residue was diluted with ethyl acetate (50.0 mL)
  5. washwashed with water (3×25.0 mL), brine (3×25.0 mL)
  6. dry with materialdried over anhydrous sodium sulfate
  7. filtrationfiltered
  8. concentrationThe filtrate was concentrated in vacuo to dryness
  9. washeluting with ethyl acetate/hexane (80%)

Quellen und Nachweise

ORD-Eintrag
ord-dd8c6599b1f5419fb68575f118b85c3c
Quelldatensatz
uspto-grants-2011_05
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US07935721B2

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