Acetate → 1-Azabicyclo[3.2.0]heptane-2-carboxylic acid, 6-[(1R)-1-hydroxyethyl]-4-methyl-3,7-dioxo-, (4-nitrophenyl)methyl ester, (4R,5R,6S)-

HRID 346377

反応式

HRID 346377 の反応式
[N+](=[C:3]([C:17](=[O:28])[C@@H:18]([C@@H:20]1[C@@H:23]([C@H:24]([OH:26])[CH3:25])[C:22](=[O:27])[NH:21]1)[CH3:19])[C:4]([O:6][CH2:7][C:8]1[CH:13]=[CH:12][C:11]([N+:14]([O-:16])=[O:15])=[CH:10][CH:9]=1)=[O:5])=[N-].C([O-])(=O)C>ClCCCl.C1C=CC=CC=1>[OH:26][C@@H:24]([C@H:23]1[C:22](=[O:27])[N:21]2[C@@H:20]1[C@@H:18]([CH3:19])[C:17](=[O:28])[CH:3]2[C:4]([O:6][CH2:7][C:8]1[CH:13]=[CH:12][C:11]([N+:14]([O-:16])=[O:15])=[CH:10][CH:9]=1)=[O:5])[CH3:25]

参加物

5

反応物 2

HCID 175AcetateHCID 57009450(R)-4-Nitrobenzyl 2-diazo-4-((2R,3S)-3-((R)-1-hydroxyethyl)-4-oxoazetidin-2-yl)-3-oxopentanoate

生成物 1

HCID 98853021-Azabicyclo[3.2.0]heptane-2-carboxylic acid, 6-[(1R)-1-hydroxyethyl]-4-methyl-3,7-dioxo-, (4-nitrophenyl)methyl ester, (4R,5R,6S)-

試薬・触媒・溶媒 2

HCID 111,2-Dichloroethane溶媒HCID 241Benzene溶媒

実験手順

To a solution of 4-nitrobenzyl (4R)-2-diazo-4-[(2R, 3S)-3-{(1R)-1-hydroxyethyl}-4-oxoazetidin-2-yl]-3-oxopentanoate (0.5 g) in 1,2-dichloroethane (10 ml) was added rhodiim(II) acetate (2 mg) under refluxing. After refluxing for 30 minutes, the reaction mixture was cooled and evaporated in vacuo to give a residue. The residue was dissolved in anhydrous benzene (10 ml) and then evaporated. This operation was repeated once again and the residue was dried in vacuo to give 4-nitrobenzyl (4R,5R,6S)-6-[(1R)-1-hydroxyethyl]-4-methyl-3,7-dioxo-1-azabicyclo[3.2.0]heptane-2-carboxylate. The compound obtained above was dissolved in anhydrous acetonitrile (10 ml) and cooled to 0° C. under an atmosphere of nitrogen. To this solution were added N,N-diisopropyl-N-ethylanine (0.27 ml) and diphenyl phosphorochloridate (0.28 ml) successively, and the solution was stirred at 0° C. for 40 minutes. To the resulting solution were added dropwise a solution of (2S,4S)-2-(difluoromethyl)thiomethyl-4-mercapto-1-(4-nitrobenzyloxycarbonyl)pyrrolidine (0.54 g) in anhydrous acetonitrile (3 ml) and N,N-diisopropyl-N-ethylamine (0.29 ml) at 5° C. with stirring, and the stirring was continued at the same temperature for 2 hours. To the reaction mixture was added ethyl acetate (30 ml). The solution was washed twice with saturated aqueous sodium chloride (20 ml), dried over anhydrous magnesium sulfate and evaporated. The oily residue was chromatographed on silica gel (60 g) eluting with a mixture of dichloromethane and acetone (5:1,V/V) to give 4-nitrobenzyl (4R,5S,6S)-3-[(2S,4S)-2-(difluoromethyl)thiomethyl-1-(4-nitrobenzyloxycarbonyl)pyrrolidin-4-ylthio]-6-[(1R)-1-hydroxyethyl]-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate (0.58 g).

後処理

  1. temperatureunder refluxing
  2. temperatureAfter refluxing for 30 minutes
  3. temperaturethe reaction mixture was cooled
  4. customevaporated in vacuo
  5. customto give a residue
  6. customevaporated
  7. customthe residue was dried in vacuo

出典と根拠

ORDレコード
ord-71670f7641774a0b9c400df36e848676
出典データセット
uspto-grants-1991_10
特許番号
US05061804

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