Potassium Carbonate → 4-(2-Formyl-4-iodo-phenoxy)-piperidine-1-carboxylic acid tert-butyl ester

HRID 1095067Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1095067
[I:1][C:2]1[CH:9]=[C:6]([CH:7]=[O:8])[C:5]([OH:10])=[CH:4][CH:3]=1.C([O-])([O-])=O.[K+].[K+].[C:17]([O:21][C:22]([N:24]1[CH2:29][CH2:28][CH:27](OS(C2C=CC(C)=CC=2)(=O)=O)[CH2:26][CH2:25]1)=[O:23])([CH3:20])([CH3:19])[CH3:18]>CN(C)C=O.C(OCC)(=O)C>[C:17]([O:21][C:22]([N:24]1[CH2:29][CH2:28][CH:27]([O:10][C:5]2[CH:4]=[CH:3][C:2]([I:1])=[CH:9][C:6]=2[CH:7]=[O:8])[CH2:26][CH2:25]1)=[O:23])([CH3:20])([CH3:18])[CH3:19]

Komponenten

6

Edukt 3

HCID 11430Potassium CarbonateHCID 2526125-IodosalicylaldehydeHCID 157347131-(tert-Butoxycarbonyl)-4-(p-toluenesulfonyloxy)piperidine

Produkt 1

HCID 577432744-(2-Formyl-4-iodo-phenoxy)-piperidine-1-carboxylic acid tert-butyl esterAusbeute 84 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 6228DimethylformamideLösungsmittelHCID 8857Ethyl AcetateLösungsmittel

Reaktionsbedingungen

Temperatur
60 °C

Versuchsvorschrift

To a solution of 5-iodosalicylaldehyde (3 g, 12.1 mmol) (Aldrich) in N,N-dimethylformamide (20 mL) was added anhydrous K2CO3 (5 g, 36.3 mmol), and 4-(toluene-4-sulfonyloxy)-piperidine-1-carboxylic acid tert-butyl ester (5.4 g, 18.1 mmol, ASTATECH). The reaction mixture was heated at 60° C. for 18 h. The mixture was cooled to room temperature, diluted with ethyl acetate, washed with water. The organic layer was separated, the aqueous layer was extracted with ethyl acetate. The organic layers were combined, washed with water, brine, dried over MgSO4, and concentrated to give crude 4-(2-formyl-4-iodo-phenoxy)-piperidine-1-carboxylic acid tert-butyl ester as a yellow oil (Yield 4.38 g, 84%).

Aufarbeitung

  1. temperatureThe mixture was cooled to room temperature
  2. washwashed with water
  3. customThe organic layer was separated
  4. extractionthe aqueous layer was extracted with ethyl acetate
  5. washwashed with water, brine
  6. dry with materialdried over MgSO4
  7. concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag
ord-cc2c979b317247feb5c24eb3d60a086a
Quelldatensatz
uspto-grants-2012_03
Patentnummer
US08134001B2

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