Sodium hydride → 1-(Benzyloxycarbonyl)-4-(3-oxo-3-phenylprop-1-enyl)piperidine

HRID 278220노트

반응식

HRID 278220 반응식
[O:1]=[C:2]([C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=1)[CH2:3]P(=O)(OCC)OCC.[H-].[Na+].[CH2:20]([O:27][C:28]([N:30]1[CH2:35][CH2:34][CH:33]([CH:36]=O)[CH2:32][CH2:31]1)=[O:29])[C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=1>C1COCC1>[CH2:20]([O:27][C:28]([N:30]1[CH2:35][CH2:34][CH:33]([CH:36]=[CH:3][C:2](=[O:1])[C:12]2[CH:13]=[CH:14][CH:15]=[CH:16][CH:17]=2)[CH2:32][CH2:31]1)=[O:29])[C:21]1[CH:22]=[CH:23][CH:24]=[CH:25][CH:26]=1

참가 물질

5

반응물 3

HCID 24758Sodium hydrideHCID 372803Diethyl 2-oxo-2-phenylethylphosphonateHCID 2776272Benzyl 4-formylpiperidine-1-carboxylate

생성물 1

HCID 570744891-(Benzyloxycarbonyl)-4-(3-oxo-3-phenylprop-1-enyl)piperidine수율 80%

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매3회

실험 절차

Diethyl (2-oxo-2-phenylethyl)phosphonate (0.96 mL, 1.1 g, 4.4 mmol) was added in one portion to a stirred suspension of sodium hydride (60% oil dispersion, 158 mg, 3.95 mmol) in THF (20 mL). After 15 min. at rt, the clear solution was cooled in an ice bath and 1-(benzyloxycarbonyl)-4-piperidinecarboxaldehyde (840 mg, 3.40 mmol) was added in THF (1.0 mL) with additional THF (2×1.0 mL) for rinsing. Stirring was continued for a total of 2 h, with slow warming to rt. The mixture was then partitioned between ether (120 mL) and 2.5 N aq. NaOH (60 mL). The organic layer was washed with saturated aq. brine (60 mL), dried (sodium sulfate), decanted, and evaporated. The crude product was purified by FC, eluting with 15-20% ethyl acetate in hexane, to give 0.95 g of the title compound as a colorless syrup.

후처리

  1. temperaturethe clear solution was cooled in an ice bath
  2. washfor rinsing
  3. customwas continued for a total of 2 h
  4. customThe mixture was then partitioned between ether (120 mL) and 2.5 N aq. NaOH (60 mL)
  5. washThe organic layer was washed with saturated aq. brine (60 mL)
  6. dry with materialdried (sodium sulfate)
  7. customdecanted
  8. customevaporated
  9. customThe crude product was purified by FC
  10. washeluting with 15-20% ethyl acetate in hexane

출처 및 근거

ORD 기록
ord-d8f24cbc4070496f867a1929c49be4c8
출처 데이터셋
uspto-grants-2002_03
특허 번호
US06358979B1

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