Hydrochloric Acid → 5-[(2'-oxo-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3-indol]-1'(2'H)-yl)methyl]furan-2-carboxylic acid

HRID 2385426

Reaktionsgleichung

Reaktionsgleichung von HRID 2385426
[O:1]=[C:2]1[C:10]2([C:22]3[C:13](=[CH:14][C:15]4[O:20][CH2:19][CH2:18][O:17][C:16]=4[CH:21]=3)[O:12][CH2:11]2)[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[N:3]1[CH2:23][C:24]1[O:28][C:27]([C:29]([O:31]C)=[O:30])=[CH:26][CH:25]=1.[OH-].[Li+].Cl>O1CCCC1.O>[O:1]=[C:2]1[C:10]2([C:22]3[C:13](=[CH:14][C:15]4[O:20][CH2:19][CH2:18][O:17][C:16]=4[CH:21]=3)[O:12][CH2:11]2)[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[N:3]1[CH2:23][C:24]1[O:28][C:27]([C:29]([OH:31])=[O:30])=[CH:26][CH:25]=1

Komponenten

6

Edukt 3

HCID 313Hydrochloric AcidHCID 3939Lithium HydroxideHCID 59352736methyl 5-[(2'-oxo-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3'-indol]-1'(2'H)-yl)methyl]furan-2-carboxylate

Produkt 1

HCID 593523035-[(2'-oxo-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3-indol]-1'(2'H)-yl)methyl]furan-2-carboxylic acidAusbeute 102,3 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 8028TetrahydrofuranLösungsmittel

Reaktionsbedingungen

Temperatur
60 °C

Versuchsvorschrift

A mixture of methyl 5-[(2′-oxo-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3′-indol]-1′(2′H)-yl)methyl]furan-2-carboxylate (1.38 g, 3.17 mmol) and lithium hydroxide (0.76 g, 31.7 mmol) in tetrahydrofuran (10 mL) and water (10 mL) was stirred at 60° C. for 2 h. The reaction mixture was acidified with 1 M hydrochloric acid (50 mL) and extracted with dichloromethane (3×30 mL). The combined organic solution was washed with brine (50 mL), dried over sodium sulfate, filtered and concentrated under reduced pressure to afford 5-[(2′-oxo-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3′-indol]-1′(2′H)-yl)methyl]furan-2-carboxylic acid (1.36 g, quantitative) as a colorless solid: mp 192-195° C. (diethyl ether); 1H NMR (300 MHz, CDCl3) δ8.40 (br s, 1H), 7.27 (dd, J=7.8, 7.8 Hz, 1H), 7.25 (d, J=3.3 Hz, 1H), 7.18 (d, J=7.5 Hz, 1H), 7.06 (dd, J=7.5, 7.5 Hz, 1H), 6.94 (d, J=7.8 Hz, 1H), 6.50 (s, 1H), 6.45 (d, J=3.3 Hz, 1H), 6.31 (s, 1H), 5.19 (d, J=16.5 Hz, 1H), 4.92 (d, J=9.3 Hz, 1H), 4.87 (d, J=16.5 Hz, 1H), 4.66 (d, J=9.3 Hz, 1H), 4.21-4.07 (m, 4H); 13C NMR (75 MHz, CDCl3) δ177.4, 162.8, 155.2, 154.4, 144.8, 143.7, 141.3, 138.6, 132.3, 129.1, 124.2, 124.0, 121.1, 120.9, 111.8, 110.7, 109.0, 99.5, 80.0, 64.7, 64.0, 58.2, 37.5; MS (ES+) m/z 419.9 (M+1).

Aufarbeitung

  1. extractionextracted with dichloromethane (3×30 mL)
  2. washThe combined organic solution was washed with brine (50 mL)
  3. dry with materialdried over sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated under reduced pressure

Quellen und Nachweise

ORD-Eintrag
ord-046df8145b4142ebb706eee2cb86bb2f
Quelldatensatz
uspto-grants-2012_09
Patentnummer
US08263606B2

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