Methyl iodide → (S)-tert-butyl 1-(tert-butyldimethylsilyloxy)pent-4-en-2-yl(methyl)carbamate

HRID 340941ノート

反応式

HRID 340941 の反応式
[Si:1]([O:8][CH2:9][C@@H:10]([NH:14][C:15](=[O:21])[O:16][C:17]([CH3:20])([CH3:19])[CH3:18])[CH2:11][CH:12]=[CH2:13])([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].[CH3:22]I.[H-].[Na+]>CN(C=O)C>[Si:1]([O:8][CH2:9][C@@H:10]([N:14]([CH3:22])[C:15](=[O:21])[O:16][C:17]([CH3:20])([CH3:19])[CH3:18])[CH2:11][CH:12]=[CH2:13])([C:4]([CH3:7])([CH3:5])[CH3:6])([CH3:3])[CH3:2]

参加物

5

反応物 3

HCID 6328Methyl iodideHCID 24758Sodium hydrideHCID 14153345(S)-tert-butyl 1-(tert-butyldimethylsilyloxy)pent-4-en-2-ylcarbamate

生成物 1

HCID 57947449(S)-tert-butyl 1-(tert-butyldimethylsilyloxy)pent-4-en-2-yl(methyl)carbamate収率 93.2%

試薬・触媒・溶媒 1

HCID 6228Dimethylformamide溶媒

反応条件

温度
0 °C

実験手順

To a solution of (S)-tert-butyl 1-(tert-butyldimethylsilyloxy)pent-4-en-2-ylcarbamate (20 g, 55.0 mmol) and MeI (6.22 mL, 99.7 mmol) in DMF (700 mL) was added sodium hydride (60%, 3.1 g, 77.6 mmol) at 0° C. The reaction was stirred at 0° C. for 2 h then warmed to 10° C. for an additional 2 h at which point LC-MS analysis showed the reaction was complete. The reaction was quenched with saturated aq. NH4Cl solution (800 mL) and EtOAc (2 L). Water was then added to dissolve the solids. The organic layer was washed with water, brine, and dried over Na2SO4. The resulting residue was purified on silica gel column using a mixture of hexanes and EtOAc to give (S)-tert-butyl 1-(tert-butyldimethylsilyloxy)pent-4-en-2-yl(methyl)carbamate (16.9 g, 81%). LRMS (M+H+) m/z 230.2.

後処理

  1. temperaturethen warmed to 10° C. for an additional 2 h at which point LC-MS analysis
  2. customThe reaction was quenched with saturated aq. NH4Cl solution (800 mL) and EtOAc (2 L)
  3. additionWater was then added
  4. dissolutionto dissolve the solids
  5. washThe organic layer was washed with water, brine
  6. dry with materialdried over Na2SO4
  7. customThe resulting residue was purified on silica gel column
  8. additiona mixture of hexanes and EtOAc

出典と根拠

ORDレコード
ord-ce351bff4e884781baec95fcca1a3738
出典データセット
uspto-grants-2014_11
特許番号
US08895582B2

反応ノート

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