Ammonium Chloride → Racemic (2R,5S,6S)-5-Azido-6-hydroxy-2-methyl-azepane-1-carboxylic acid benzyl ester

HRID 1790611

Reaktionsgleichung

Reaktionsgleichung von HRID 1790611
[N-:1]=[N+:2]=[N-:3].[Na+].[CH2:5]([O:12][C:13]([N:15]1[CH:22]([CH3:23])[CH2:21][CH2:20][CH:19]2[CH:17]([O:18]2)[CH2:16]1)=[O:14])[C:6]1[CH:11]=[CH:10][CH:9]=[CH:8][CH:7]=1.[Cl-].[NH4+]>CO.O>[CH2:5]([O:12][C:13]([N:15]1[CH2:16][CH:17]([OH:18])[CH:19]([N:1]=[N+:2]=[N-:3])[CH2:20][CH2:21][CH:22]1[CH3:23])=[O:14])[C:6]1[CH:11]=[CH:10][CH:9]=[CH:8][CH:7]=1

Komponenten

6

Edukt 3

HCID 25517Ammonium ChlorideHCID 33557Sodium AzideHCID 21036429racemic (1S,4R,7R)-4-methyl-8-oxa-3-aza-bicyclo[5.1.0]octane-3-carboxylic acid benzyl ester

Produkt 1

HCID 21036431Racemic (2R,5S,6S)-5-Azido-6-hydroxy-2-methyl-azepane-1-carboxylic acid benzyl esterAusbeute 80,1 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 887MethanolLösungsmittelHCID 962WaterLösungsmittel

Versuchsvorschrift

Sodium azide (0.56 g, 8.62 mmol) was added to a solution of racemic (1S,4R,7R)-4-methyl-8-oxa-3-aza-bicyclo[5.1.0]octane-3-carboxylic acid benzyl ester (0.75 g, 2.87 mmol) and ammonium chloride (0.46 g, 8.62 mmol) in MeOH (5 ml) and H2O (0.5 ml), then was refluxed for 6 h. The reaction mixture was concentrated in vacuo by rotary evaporation, then was diluted with water (5 ml) and extracted with EtOAc (10 ml). The organic layer was then extracted with water, brine, dried with MgSO4, filtered, concentrated in vacuo by rotary evaporation, and chromatographed (silica gel, 20% EtOAc/hexanes) to yield the title compound (0.7 g, 80%): 7.39–7.30 (m, 5H), 5.15 (2H, s), 4.10–3.67 (m, 2H), 3.10 (1H, d), 1.85–1.53 (m, 4H), 1.09 (3H, d); Liquid Chromatgraphy/Electrospray mass spec: M+H+=305.2.

Aufarbeitung

  1. temperaturewas refluxed for 6 h
  2. concentrationThe reaction mixture was concentrated in vacuo by rotary evaporation
  3. additionwas diluted with water (5 ml)
  4. extractionextracted with EtOAc (10 ml)
  5. extractionThe organic layer was then extracted with water, brine
  6. dry with materialdried with MgSO4
  7. filtrationfiltered
  8. concentrationconcentrated in vacuo by rotary evaporation
  9. customchromatographed (silica gel, 20% EtOAc/hexanes)

Quellen und Nachweise

ORD-Eintrag
ord-ddaf0bbb2bfd4fa883ae90f4cfbeb0f3
Quelldatensatz
uspto-grants-2006_07
Patentnummer
US07071184B2

Verknüpfte Notizen

Wird geladen…