Water → (R)-2-{2-[6-butyl-5-(4-cyclohexyloxy-phenyl)-pyridazin-3-yloxy]-ethyl}-piperidine-1-carboxylic acid tert-butyl ester

HRID 1971917Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1971917
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH2:11][CH2:10][C@@H:9]1[CH2:14][CH2:15][OH:16])=[O:7])([CH3:4])([CH3:3])[CH3:2].[H-].[Na+].[CH2:19]([C:23]1[N:24]=[N:25][C:26](Cl)=[CH:27][C:28]=1[C:29]1[CH:34]=[CH:33][C:32]([O:35][CH:36]2[CH2:41][CH2:40][CH2:39][CH2:38][CH2:37]2)=[CH:31][CH:30]=1)[CH2:20][CH2:21][CH3:22].O>CN(C=O)C.C(OCC)(=O)C>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH2:11][CH2:10][C@@H:9]1[CH2:14][CH2:15][O:16][C:26]1[N:25]=[N:24][C:23]([CH2:19][CH2:20][CH2:21][CH3:22])=[C:28]([C:29]2[CH:30]=[CH:31][C:32]([O:35][CH:36]3[CH2:41][CH2:40][CH2:39][CH2:38][CH2:37]3)=[CH:33][CH:34]=2)[CH:27]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2]

Komponenten

7

Edukt 4

HCID 962WaterHCID 24758Sodium hydrideHCID 15142441,1-Dimethylethyl (2R)-2-(2-hydroxyethyl)-1-piperidinecarboxylateHCID 866577793-Butyl-6-chloro-4-(4-cyclohexyloxy-phenyl)-pyridazine

Produkt 1

HCID 67375014(R)-2-{2-[6-butyl-5-(4-cyclohexyloxy-phenyl)-pyridazin-3-yloxy]-ethyl}-piperidine-1-carboxylic acid tert-butyl ester

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 6228DimethylformamideLösungsmittel2×HCID 8857Ethyl AcetateLösungsmittel

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

To a stirred solution of (R)-2-(2-hydroxy-ethyl)-piperidine-1-carboxylic acid tert-butyl ester (0.87 mmol, 0.20 g) in DMF (1.0 mL) at room temperature was added sodium hydride (60% dispersion in mineral oil) (2.61 mmol, 0.104 g) and continued stirring for 15 min. The reaction mixture was cooled to 0° C. using an ice bath. To this was added a solution of 3-butyl-6-chloro-4-(4-cyclohexyloxy-phenyl)-pyridazine (Example 14, 0.435 mmol, 0.15 g) in DMF (1.0 mL). After completion of addition, the reaction mixture was warmed to 50° C. for 12 hour. The reaction was poured into a mixture of water (10 mL) and ethyl acetate (5 mL). The mixture was shaken and separated. The ethyl acetate layer was washed with brine (2 mL), dried (Na2SO4), filtered and concentrated under reduced pressure. The residue was purified on a 12 g SiO2 cartridge using ethyl acetate/hexanes gradient to give (R)-2-{2-[6-butyl-5-(4-cyclohexyloxy-phenyl)-pyridazin-3-yloxy]-ethyl}-piperidine-1-carboxylic acid tert-butyl ester.

Aufarbeitung

  1. additionAfter completion of addition
  2. temperaturethe reaction mixture was warmed to 50° C. for 12 hour
  3. stirringThe mixture was shaken
  4. customseparated
  5. washThe ethyl acetate layer was washed with brine (2 mL)
  6. dry with materialdried (Na2SO4)
  7. filtrationfiltered
  8. concentrationconcentrated under reduced pressure
  9. customThe residue was purified on a 12 g SiO2 cartridge

Quellen und Nachweise

ORD-Eintrag
ord-e5fa8be69bae47b1a6caff14edcf959a
Quelldatensatz
uspto-grants-2013_04
Patentnummer
US08431575B2

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