1'-[4-(benzyloxy)benzyl]-5,6-dihydrospiro[benzo[1,2-b:5,4-b']difuran-3,3'-indol]-2'(1'H)-one → 1'-(4-hydroxybenzyl)-5,6-dihydrospiro[benzo[1,2-b:5,4-b']difuran-3,3'-indol]-2'(1'H)-one

HRID 1965794Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1965794
C([O:8][C:9]1[CH:36]=[CH:35][C:12]([CH2:13][N:14]2[C:22]3[C:17](=[CH:18][CH:19]=[CH:20][CH:21]=3)[C:16]3([CH2:26][O:25][C:24]4[CH:27]=[C:28]5[C:32](=[CH:33][C:23]3=4)[CH2:31][CH2:30][O:29]5)[C:15]2=[O:34])=[CH:11][CH:10]=1)C1C=CC=CC=1>[Pd].CO.C(OCC)(=O)C>[OH:8][C:9]1[CH:10]=[CH:11][C:12]([CH2:13][N:14]2[C:22]3[C:17](=[CH:18][CH:19]=[CH:20][CH:21]=3)[C:16]3([CH2:26][O:25][C:24]4[CH:27]=[C:28]5[C:32](=[CH:33][C:23]3=4)[CH2:31][CH2:30][O:29]5)[C:15]2=[O:34])=[CH:35][CH:36]=1

Komponenten

5

Edukt 1

HCID 593523251'-[4-(benzyloxy)benzyl]-5,6-dihydrospiro[benzo[1,2-b:5,4-b']difuran-3,3'-indol]-2'(1'H)-one

Produkt 1

HCID 593524451'-(4-hydroxybenzyl)-5,6-dihydrospiro[benzo[1,2-b:5,4-b']difuran-3,3'-indol]-2'(1'H)-oneAusbeute 94,6 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 23938PalladiumKatalysatorHCID 887MethanolLösungsmittelHCID 8857Ethyl AcetateLösungsmittel

Versuchsvorschrift

A mixture of 1′-[4-(benzyloxy)benzyl]-5,6-dihydrospiro[benzo[1,2-b:5,4-b′]difuran-3,3′-indol]-2′(1H)-one (2.4 g, 5.1 mmol) and palladium on carbon (10% w/w, 0.49 g) in anhydrous methanol (10 mL) and ethyl acetate (50 mL) was hydrogenated at ambient temperature under a balloon pressure for 16 h. The mixture was filtered through a pad of diatomaceous earth The pad was washed with ethyl acetate (50 mL) and the filtrate was concentrated in vacuo. The residue was purified by column chromatography and eluted with a 25% to 50% gradient of ethyl acetate in hexanes to afford 1′-(4-hydroxybenzyl)-5,6-dihydrospiro[benzo[1,2-b:5,4-b′]difuran-3,3′-indol]-2′(1′H)-one (1.86 g, 94%) as a colorless solid: mp 226-227° C.; 1H NMR (300 MHz, CDCl3) δ 7.25-7.13 (m, 4H), 7.06-6.99 (m, 1H), 6.87-6.82 (m, 1H), 6.78-6.72 (m, 2H), 6.44-6.41 (m, 2H), 5.27 (s, 1H), 4.88 (ABq, J=69.0, 15.3 Hz, 2H), 4.84 (ABq, J=82.9, 9.0 Hz, 2H), 4.55-4.46 (m, 2H), 2.96-2.86 (m, 2H); 13C NMR (75 MHz, CDCl3) δ 178.2, 161.8, 161.3, 155.5, 142.1, 132.8, 128.8, 128.7, 127.5, 123.9, 123.5, 120.0, 119.9, 118.8, 115.8, 109.4, 93.3, 80.5, 72.4, 70.0, 57.8, 43.7, 28.9; MS (ES+) m/z 385.9 (M+1).

Aufarbeitung

  1. filtrationThe mixture was filtered through a pad of diatomaceous earth The pad
  2. washwas washed with ethyl acetate (50 mL)
  3. concentrationthe filtrate was concentrated in vacuo
  4. customThe residue was purified by column chromatography
  5. washeluted with a 25% to 50% gradient of ethyl acetate in hexanes

Quellen und Nachweise

ORD-Eintrag
ord-937ca213010d4e0f8fda938a448f42bc
Quelldatensatz
uspto-grants-2013_04
Patentnummer
US08415370B2

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