Dimethyl Sulfoxide → 4-(4-Chloro-2-methoxyphenyl)-2-hydroxy-4-methyl-2-(trifluoromethyl)pentanal

HRID 1444393Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1444393
C(Cl)(=O)C(Cl)=O.CS(C)=O.[Cl:11][C:12]1[CH:17]=[CH:16][C:15]([C:18]([CH3:29])([CH3:28])[CH2:19][C:20]([OH:27])([C:23]([F:26])([F:25])[F:24])[CH2:21][OH:22])=[C:14]([O:30][CH3:31])[CH:13]=1.C(N(CC)CC)C>ClCCl.O>[Cl:11][C:12]1[CH:17]=[CH:16][C:15]([C:18]([CH3:29])([CH3:28])[CH2:19][C:20]([OH:27])([C:23]([F:26])([F:25])[F:24])[CH:21]=[O:22])=[C:14]([O:30][CH3:31])[CH:13]=1

Komponenten

7

Edukt 4

HCID 679Dimethyl SulfoxideHCID 8471TriethylamineHCID 65578Oxalyl chlorideHCID 219488394-(4-Chloro-2-methoxyphenyl)-2-hydroxy-4-methyl-2-(trifluoromethyl)pentan-1-ol

Produkt 1

HCID 219489374-(4-Chloro-2-methoxyphenyl)-2-hydroxy-4-methyl-2-(trifluoromethyl)pentanalAusbeute 96,9 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 6344DichloromethaneLösungsmittel3×

Versuchsvorschrift

854.6 mg (6.733 mmol) of oxalyl chloride in 14.5 ml of dichloromethane is introduced into a heated flask. At −70° C., 1.05 ml of DMSO, dissolved in 3 ml of dichloromethane, is added in drops, and the batch is stirred for five more minutes. Then, 2 g (6.12 mmol) of 4-(4-chloro-2-methoxyphenyl)-2-hydroxy-4-methyl-2-trifluoromethyl-pentan-1-ol, dissolved in six milliliters of dichloromethane, is added in drops. After 20 minutes of stirring, the batch is carefully mixed with 4.24 ml (30.61 mmol) of triethylamine, specifically in a temperature range of between −70 and −60° C. After five minutes of stirring at −70° C., the reaction mixture is allowed to slowly come to room temperature. 25 ml of water is added, and the batch is stirred for another hour at room temperature. After phase separation, the aqueous phase is shaken once with 100 ml of dichloromethane. The combined organic extracts are washed with 1% sulfuric acid, 5% sodium bicarbonate solution and brine. According to the conventional procedure, 1.92 g (96.9%) of the desired aldehyde is obtained, which is incorporated in crude form into the next stage.

Aufarbeitung

  1. additionis added in drops
  2. additionis added in drops
  3. stirringAfter 20 minutes of stirring
  4. stirringAfter five minutes of stirring at −70° C.
  5. customto slowly come to room temperature
  6. stirringthe batch is stirred for another hour at room temperature
  7. customAfter phase separation
  8. stirringthe aqueous phase is shaken once with 100 ml of dichloromethane
  9. washThe combined organic extracts are washed with 1% sulfuric acid, 5% sodium bicarbonate solution and brine

Quellen und Nachweise

ORD-Eintrag
ord-d1d2e280151942af98962fc317f0f32e
Quelldatensatz
uspto-grants-2010_02
Patentnummer
US07662821B2

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