Methyl iodide → (S)-tert-butyl 4-(4-((benzyloxycarbonyl)(methyl)amino)-5-(tert-butyldimethylsilyloxy)pentanoyl)piperazine-1-carboxylate

HRID 409793ノート

反応式

HRID 409793 の反応式
[CH2:1]([O:8][C:9]([NH:11][C@H:12]([CH2:30][O:31][Si:32]([C:35]([CH3:38])([CH3:37])[CH3:36])([CH3:34])[CH3:33])[CH2:13][CH2:14][C:15]([N:17]1[CH2:22][CH2:21][N:20]([C:23]([O:25][C:26]([CH3:29])([CH3:28])[CH3:27])=[O:24])[CH2:19][CH2:18]1)=[O:16])=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.I[CH3:40].[H-].[Na+]>CN(C=O)C>[CH2:1]([O:8][C:9]([N:11]([CH3:40])[C@H:12]([CH2:30][O:31][Si:32]([C:35]([CH3:38])([CH3:37])[CH3:36])([CH3:34])[CH3:33])[CH2:13][CH2:14][C:15]([N:17]1[CH2:22][CH2:21][N:20]([C:23]([O:25][C:26]([CH3:29])([CH3:28])[CH3:27])=[O:24])[CH2:19][CH2:18]1)=[O:16])=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

参加物

5

反応物 3

HCID 6328Methyl iodideHCID 24758Sodium hydrideHCID 57948091(S)-tert-butyl 4-(4-(benzyloxycarbonylamino)-5-(tert-butyldimethylsilyloxy)pentanoyl)piperazine-1-carboxylate

生成物 1

HCID 57948144(S)-tert-butyl 4-(4-((benzyloxycarbonyl)(methyl)amino)-5-(tert-butyldimethylsilyloxy)pentanoyl)piperazine-1-carboxylate収率 102.6%

試薬・触媒・溶媒 1

HCID 6228Dimethylformamide溶媒

反応条件

温度
2.5 °C

実験手順

To a solution of (S)-tert-butyl 4-(4-(benzyloxycarbonylamino)-5-(tert-butyldimethylsilyloxy)pentanoyl)piperazine-1-carboxylate (32.3 g, 58.8 mmol) and iodomethane (7.3 mL, 117.6 mmol) in DMF (450 mL) was added solid sodium hydride (60%, 3.5 g, 88.2 mmol) at 0-5° C. The mixture was stirred at 0-5° C. for 30 min and quenched with saturated NH4Cl solution. The mixture was concentrated to remove most of DMF under high vacuum. The residue was dissolved in EtOAc (700 mL). The organic mixture was washed with water and brine, dried over Na2SO4, filtered, and concentrated to give (S)-tert-butyl 4-(4-((benzyloxycarbonyl)(methyl)amino)-5-(tert-butyldimethylsilyloxy)pentanoyl)piperazine-1-carboxylate (34 g, crude), which was used without further purification. LRMS (M+H) m/z 564.3.

後処理

  1. customquenched with saturated NH4Cl solution
  2. concentrationThe mixture was concentrated
  3. customto remove most of DMF under high vacuum
  4. dissolutionThe residue was dissolved in EtOAc (700 mL)
  5. washThe organic mixture was washed with water and brine
  6. dry with materialdried over Na2SO4
  7. filtrationfiltered
  8. concentrationconcentrated

出典と根拠

ORDレコード
ord-5ba51015e3fd45eb8c14272e900c751f
出典データセット
uspto-grants-2014_06
特許番号
US08759374B2

反応ノート

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