Cesium carbonate → HCID 67182479、化合物

HRID 2225142ノート

反応式

HRID 2225142 の反応式
[CH2:1]([O:8][C:9]([NH:11][C@@H:12]([CH2:32][CH2:33]SC)[C:13]([NH:15][C@H:16]1[CH2:22][CH2:21][C@@H:20]2[CH2:23][C@H:17]1[C:18](=[O:31])[N:19]2[C:24]([O:26][C:27]([CH3:30])([CH3:29])[CH3:28])=[O:25])=[O:14])=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C([O-])([O-])=O.[Cs+].[Cs+]>IC.CN(C=O)C>[CH2:1]([O:8][C:9]([NH:11][C@H:12]1[CH2:32][CH2:33][N:15]([C@H:16]2[CH2:22][CH2:21][C@@H:20]3[CH2:23][C@H:17]2[C:18](=[O:31])[N:19]3[C:24]([O:26][C:27]([CH3:30])([CH3:29])[CH3:28])=[O:25])[C:13]1=[O:14])=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

参加物

5

反応物 2

HCID 10796Cesium carbonateHCID 21074905(1R,2S,5R)-tert-butyl 2-((S)-2-(benzyloxycarbonylamino)-4-(methylthio)butanamido)-7-oxo-6-aza-bicyclo[3.2.1]octane-6-carboxylate

生成物 1

HCID 67182479HCID 67182479、化合物収率 43.3%

試薬・触媒・溶媒 2

HCID 6228Dimethylformamide溶媒HCID 6328Methyl iodide溶媒

実験手順

Preparation A3, Step 3: (1R,2S,5R)-Tert-butyl 2-((S)-2-(benzyloxycarbonylamino)-4-(methylthio)butanamido)-7-oxo-6-aza-bicyclo[3.2.1]octane-6-carboxylate (5.1 g) was dissolved in iodomethane (40 mL). The resulting solution was stirred at rt for 12 h before being concentrated in vacuo. The residue was dissolved in methylene chloride, and the resulting solution was concentrated; this was repeated to afford the salt. This material was dissolved in DMF (30 mL) and the solution was charged with Cs2CO3 (6.6 g). After 12 h, the reaction was partitioned between EtOAc and brine. The organic phase was dried (MgSO4), filtered, and concentrated. The resulting residue was purified by flash chromatography to afford (1R,2S,5R)-tert-butyl 2-((S)-3-(benzyloxycarbonylamino)-2-oxopyrrolidin-1-yl)-7-oxo-6-aza-bicyclo[3.2.1]octane-6-carboxylate (2.0 g). MS found: (M+H)+=458.6.

後処理

  1. concentrationbefore being concentrated in vacuo
  2. dissolutionThe residue was dissolved in methylene chloride
  3. concentrationthe resulting solution was concentrated
  4. customto afford the salt
  5. waitAfter 12 h
  6. customthe reaction was partitioned between EtOAc and brine
  7. dry with materialThe organic phase was dried (MgSO4)
  8. filtrationfiltered
  9. concentrationconcentrated
  10. customThe resulting residue was purified by flash chromatography

出典と根拠

ORDレコード
ord-dfcac45b910646378cdd3b6812bc29b8
出典データセット
uspto-grants-2008_05
特許番号
US07378409B2

反応ノート

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