Tetrahydrofuran → tert-Butyl cis(+/-)-4-{[(benzyloxy)carbonyl]amino}-3-methoxypiperidine-1-carboxylate

HRID 43600

Reaktionsgleichung

Reaktionsgleichung von HRID 43600
C1COCC1.[NH2:6][C@H:7]1[CH2:12][CH2:11][N:10]([C:13]([O:15][C:16]([CH3:19])([CH3:18])[CH3:17])=[O:14])[CH2:9][C@H:8]1[O:20][CH3:21].C(=O)(O)[O-].[Na+].Cl[C:28]([O:30][CH2:31][C:32]1[CH:37]=[CH:36][CH:35]=[CH:34][CH:33]=1)=[O:29]>O>[CH2:31]([O:30][C:28]([NH:6][C@H:7]1[CH2:12][CH2:11][N:10]([C:13]([O:15][C:16]([CH3:17])([CH3:18])[CH3:19])=[O:14])[CH2:9][C@H:8]1[O:20][CH3:21])=[O:29])[C:32]1[CH:37]=[CH:36][CH:35]=[CH:34][CH:33]=1

Komponenten

6

Edukt 4

HCID 8028TetrahydrofuranHCID 10387Benzyl chloroformateHCID 516892Sodium BicarbonateHCID 57362389(3R,4S)-4-Amino-1-boc-3-methoxypiperidine

Produkt 1

HCID 86648489tert-Butyl cis(+/-)-4-{[(benzyloxy)carbonyl]amino}-3-methoxypiperidine-1-carboxylateAusbeute 95 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 962WaterLösungsmittel2×

Versuchsvorschrift

THF (20 mL) and water (15 mL) were added to tert-butyl cis(±)-4-amino-3-methoxypiperidine-1-carboxylate (described in Example (1e), 4.6 g, 20 mmol). The mixture was stirred, during which sodium bicarbonate (3.44 g, 40 mmol) and benzyl chloroformate (3.95 g, 22 mmol) were added at room temperature, followed by stirring for one hour. The reaction solution was diluted with water, followed by extraction with ethyl acetate. The organic layer was washed with brine, dried over anhydrous magnesium sulfate, and then concentrated under reduced pressure. The residue was purified by silica gel column chromatography (elution solvent: ethyl acetate/hexane=1/4, 1/2, 1/1) to obtain 6.89 g of the title compound as a colorless solid (95%).

Aufarbeitung

  1. additionwere added at room temperature
  2. extractionfollowed by extraction with ethyl acetate
  3. washThe organic layer was washed with brine
  4. dry with materialdried over anhydrous magnesium sulfate
  5. concentrationconcentrated under reduced pressure
  6. customThe residue was purified by silica gel column chromatography (elution solvent: ethyl acetate/hexane=1/4, 1/2, 1/1)

Quellen und Nachweise

ORD-Eintrag
ord-da22337b9bd14591aeccc26c79005c28
Quelldatensatz
uspto-grants-2013_09
Patentnummer
US08536197B2

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