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Potassium Hydroxide → 7-(5-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,2,4-oxadiazol-3-yl)-1-methyl-1H-indole-3-carboxylic acid

HRID 1512801
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1512801
[Cl:1][C:2]1[CH:3]=[C:4]([C:12]2[O:16][N:15]=[C:14]([C:17]3[CH:18]=[CH:19][CH:20]=[C:21]4[C:25]=3[N:24]([CH3:26])[CH:23]=[C:22]4[CH:27]=[O:28])[N:13]=2)[CH:5]=[CH:6][C:7]=1[O:8][CH:9]([CH3:11])[CH3:10].[O-:29][Mn](=O)(=O)=O.[K+].[OH-].[K+]>C1COCC1>[Cl:1][C:2]1[CH:3]=[C:4]([C:12]2[O:16][N:15]=[C:14]([C:17]3[CH:18]=[CH:19][CH:20]=[C:21]4[C:25]=3[N:24]([CH3:26])[CH:23]=[C:22]4[C:27]([OH:29])=[O:28])[N:13]=2)[CH:5]=[CH:6][C:7]=1[O:8][CH:9]([CH3:10])[CH3:11]
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Komponenten

5

Edukt 3

HCID 14797Potassium HydroxideHCID 516875Potassium PermanganateHCID 591461277-(5-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,2,4-oxadiazol-3-yl)-1-methyl-1H-indole-3-carbaldehyde

Produkt 1

HCID 591460907-(5-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,2,4-oxadiazol-3-yl)-1-methyl-1H-indole-3-carboxylic acidAusbeute 89,2 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028
Tetrahydrofuran
Lösungsmittel
2×

Reaktionsbedingungen

Temperatur
55 °C

Versuchsvorschrift

To a solution of 7-(5-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,2,4-oxadiazol-3-yl)-1-methyl-1H-indole-3-carbaldehyde (D61) (1.4 g) in THF (20 mL) was added KMnO4 (1.1 g) and aqueous KOH (10 mL). The reaction mixture was stirred at 55° C. overnight. After cooled to room temperature, the mixture was diluted with THF (30 mL), and filtered. The filtrate was concentrated and the aqueous suspension was acidified with aqueous HCl (2 M) to pH 5-6. The resulting white solid was collected, washed with water, dried in vacuo to give the crude compound, which was purified by column chromatography (10% ethyl acetate in hexane) to afford 7-(5-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,2,4-oxadiazol-3-yl)-1-methyl-1H-indole-3-carboxylic acid (D95) as a white solid (1.3 g). δH (DMSO-d6, 400 MHz): 1.36 (6H, d), 3.74 (3H, s), 4.88 (1H, m), 7.35 (1H, dd), 7.45 (1H, d), 7.53 (1H, dd), 8.12 (1H, d), 8.14 (1H, d), 8.20 (1H, d), 8.32 (1H, dd), 12.15 (1H, s). MS (ES): C21H18ClN3O4 requires 411. found 412.1 (M+H+).

Aufarbeitung

  1. temperatureAfter cooled to room temperature
  2. filtrationfiltered
  3. concentrationThe filtrate was concentrated
  4. customThe resulting white solid was collected
  5. washwashed with water
  6. customdried in vacuo
  7. customto give the crude compound, which
  8. customwas purified by column chromatography (10% ethyl acetate in hexane)

Quellen und Nachweise

ORD-Eintrag
ord-4d015fc173af4842a024b3842924d05d
Quelldatensatz
uspto-grants-2012_07
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08217028B2

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