Sodium hydride → (R)-tert-butyl 3-((R)-1-(2-(tert-butyldimethylsilyloxy)ethoxy)-1-(3-chlorophenyl)ethyl)piperidine-1-carboxylate

HRID 451714

Reaktionsgleichung

Reaktionsgleichung von HRID 451714
[Cl:1][C:2]1[CH:3]=[C:4]([C@@:8]([C@@H:11]2[CH2:16][CH2:15][CH2:14][N:13]([C:17]([O:19][C:20]([CH3:23])([CH3:22])[CH3:21])=[O:18])[CH2:12]2)([OH:10])[CH3:9])[CH:5]=[CH:6][CH:7]=1.[H-].[Na+].Br[CH2:27][CH2:28][O:29][Si:30]([C:33]([CH3:36])([CH3:35])[CH3:34])([CH3:32])[CH3:31]>C1COCC1>[Si:30]([O:29][CH2:28][CH2:27][O:10][C@:8]([C@@H:11]1[CH2:16][CH2:15][CH2:14][N:13]([C:17]([O:19][C:20]([CH3:23])([CH3:22])[CH3:21])=[O:18])[CH2:12]1)([C:4]1[CH:5]=[CH:6][CH:7]=[C:2]([Cl:1])[CH:3]=1)[CH3:9])([C:33]([CH3:36])([CH3:35])[CH3:34])([CH3:32])[CH3:31]

Komponenten

5

Edukt 3

HCID 24758Sodium hydrideHCID 3608067(2-Bromoethoxy)-tert-butyldimethylsilaneHCID 59201475(R)-tert-butyl 3-((R)-1-(3-chlorophenyl)-1-hydroxyethyl)piperidine-1-carboxylate

Produkt 1

HCID 59201381(R)-tert-butyl 3-((R)-1-(2-(tert-butyldimethylsilyloxy)ethoxy)-1-(3-chlorophenyl)ethyl)piperidine-1-carboxylate

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Reaktionsbedingungen

Temperatur
80 °C

Versuchsvorschrift

A mixture of (R)-tert-butyl 3-((R)-1-(3-chlorophenyl)-1-hydroxyethyl)piperidine-1-carboxylate (2.5463 g, 7.49 mmol), 60% NaH (2.120 g, 53 mmol), and (2-bromoethoxy)(tert-butyl)dimethylsilane (7.820 g, 32.7 mmol) in THF was heated at 80° C. for 25 h and then cooled to rt. The reaction mixture was then quenched with water and extracted with ethyl acetate (3×), dried over Na2SO4. After the solvent was evaporated under reduced pressure, crude (R)-tert-butyl 3-((R)-1-(2-(tert-butyldimethylsilyloxy)ethoxy)-1-(3-chlorophenyl)ethyl)piperidine-1-carboxylate was used directly in the next step without further purification.

Aufarbeitung

  1. temperaturecooled to rt
  2. customThe reaction mixture was then quenched with water
  3. extractionextracted with ethyl acetate (3×)
  4. dry with materialdried over Na2SO4
  5. customAfter the solvent was evaporated under reduced pressure, crude (R)-tert-butyl 3-((R)-1-(2-(tert-butyldimethylsilyloxy)ethoxy)-1-(3-chlorophenyl)ethyl)piperidine-1-carboxylate
  6. customwas used directly in the next step without further purification

Quellen und Nachweise

ORD-Eintrag
ord-f455875ebece43e0b9881a1d802ae920
Quelldatensatz
uspto-grants-2013_07
Patentnummer
US08487108B2

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