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

HRID 229795

반응식

HRID 229795 반응식
[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

참가 물질

6

반응물 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

생성물 1

HCID 21036431Racemic (2R,5S,6S)-5-Azido-6-hydroxy-2-methyl-azepane-1-carboxylic acid benzyl ester수율 80.1%

시약·촉매·용매 2

HCID 887Methanol용매HCID 962Water용매

실험 절차

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.

후처리

  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)

출처 및 근거

ORD 기록
ord-6acd4caa76d14639852c52959f336148
출처 데이터셋
uspto-grants-2009_07
특허 번호
US07563784B2

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