Potassium Carbonate → Tert-butyl (3S,4S)-3-hydroxy-4-(4-hydroxyphenyl)piperidine-1-carboxylate

HRID 1507216Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1507216
C(OC([O:8][C:9]1[CH:14]=[CH:13][C:12]([C@@H:15]2[CH2:20][CH2:19][N:18]([C:21]([O:23][C:24]([CH3:27])([CH3:26])[CH3:25])=[O:22])[CH2:17][C@H:16]2[OH:28])=[CH:11][CH:10]=1)=O)(C)(C)C.C(=O)([O-])[O-].[K+].[K+]>CO>[OH:28][C@H:16]1[C@H:15]([C:12]2[CH:11]=[CH:10][C:9]([OH:8])=[CH:14][CH:13]=2)[CH2:20][CH2:19][N:18]([C:21]([O:23][C:24]([CH3:27])([CH3:26])[CH3:25])=[O:22])[CH2:17]1

Komponenten

4

Edukt 2

HCID 11430Potassium CarbonateHCID 118207358HCID 118207358, Verbindung

Produkt 1

HCID 24820608Tert-butyl (3S,4S)-3-hydroxy-4-(4-hydroxyphenyl)piperidine-1-carboxylateAusbeute 92 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 887MethanolLösungsmittel

Versuchsvorschrift

To a solution of (±)-rel-(3S,4S)-tert-butyl 4-(4-(tert-butoxycarbonyloxy)phenyl)-3-hydroxypiperidine-1-carboxylate (6.5 g, 16.5 mmol) in 100 mL of methanol was added 11.42 g of potassium carbonate (83 mmol) and the reaction mixture was stirred at rt for 5 h. The organic solvent was removed under reduced pressure and the residue was partitioned between 1N HCl (300 mL) and ethyl acetate (300 mL). The layers were separated and the organic layer was dried over Na2SO4 and evaporated under reduced pressure to give (±)-rel-(3S,4S)-tert-butyl 3-hydroxy-4-(4-hydroxyphenyl)piperidine-1-carboxylate (5 g, 15 mmol, 92% yield) which was used without further purification. LCMS (method F) RT 1.85 min, m/z 238 (M+H+−t-butyl), 279 (M+H+−t-butyl+CH3CN), 1H NMR (400 MHz, DMSO-d6) δ ppm 7.01 (d, J=8.53 Hz, 2H) 6.66 (d, J=8.53 Hz, 2H) 4.70 (d, J=5.02 Hz, 1H) 4.09 (br. s., 1H) 3.94 (d, J=11.55 Hz, 1H) 3.35-3.41 (m, 1H) 2.66-2.77 (m, 1H) 2.29-2.39 (m, 1H) 1.63 (dd, J=13.30, 3.26 Hz, 1H) 1.44-1.52 (m, 1H) 1.42 (s, 9H).

Aufarbeitung

  1. customThe organic solvent was removed under reduced pressure
  2. customthe residue was partitioned between 1N HCl (300 mL) and ethyl acetate (300 mL)
  3. customThe layers were separated
  4. dry with materialthe organic layer was dried over Na2SO4
  5. customevaporated under reduced pressure

Quellen und Nachweise

ORD-Eintrag
ord-1bcfed1c83d14108a01aa6cb21705415
Quelldatensatz
uspto-grants-2015_12
Patentnummer
US09221796B2

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