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

HRID 409803노트

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HRID 409803 반응식
[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]

참가 물질

5

반응물 3

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

생성물 1

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

시약·촉매·용매 1

HCID 6228Dimethylformamide용매

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온도
0 °C

실험 절차

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.

후처리

  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

출처 및 근거

ORD 기록
ord-bee1bf6d96e94c9cbaafe6625c6eb096
출처 데이터셋
uspto-grants-2014_06
특허 번호
US08759374B2

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