1,8-Diazabicyclo(5.4.0)undec-7-ene → 1-[(1S)-1-azidoethyl]-3-nitrobenzene

HRID 1255822노트

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HRID 1255822 반응식
[N+:1]([C:4]1[CH:5]=[C:6]([C@H:10](O)[CH3:11])[CH:7]=[CH:8][CH:9]=1)([O-:3])=[O:2].C1(P([N:27]=[N+:28]=[N-:29])(C2C=CC=CC=2)=O)C=CC=CC=1.N12CCCN=C1CCCCC2>O1CCCC1.C(OCC)(=O)C.O>[N:27]([C@H:10]([C:6]1[CH:7]=[CH:8][CH:9]=[C:4]([N+:1]([O-:3])=[O:2])[CH:5]=1)[CH3:11])=[N+:28]=[N-:29]

참가 물질

7

반응물 3

HCID 811841,8-Diazabicyclo(5.4.0)undec-7-eneHCID 199401P,P-Diphenylphosphinic azideHCID 11147933(R)-1-(3-nitrophenyl)ethanol

생성물 1

HCID 866418551-[(1S)-1-azidoethyl]-3-nitrobenzene수율 130.1%

시약·촉매·용매 3

HCID 962Water용매HCID 8028Tetrahydrofuran용매HCID 8857Ethyl Acetate용매

실험 절차

To a solution of (1R)-1-(3-nitrophenyl)ethanol (12 g, 72 mmol) in tetrahydrofuran (220 mL), cooled to 0° C., was added diphenylphosphoryl azide (31 mL, 145 mmol) in one portion followed by 1,8-diazabicyclo[5.4.0]undec-7-ene (22 mL, 145 mmol) dropwise over 30 minutes. The reaction mixture was allowed to warm slowly to room temperature and was stirred for 38 hours after which time the mixture was diluted with ethyl acetate (100 mL) and water (100 mL), the two phases separated and the aqueous phase extracted with ethyl acetate (2×100 mL). The combined organic phases were washed with brine (100 mL), dried (MgSO4) and concentrated under reduced pressure to give a black liquid. The crude liquid was purified by flash chromatography (silica, ethyl acetate/hexanes) to give 1-[(1S)-1-azidoethyl]-3-nitrobenzene (18 g) as a yellow liquid in acceptable purity.

후처리

  1. customthe two phases separated
  2. extractionthe aqueous phase extracted with ethyl acetate (2×100 mL)
  3. washThe combined organic phases were washed with brine (100 mL)
  4. dry with materialdried (MgSO4)
  5. concentrationconcentrated under reduced pressure
  6. customto give a black liquid
  7. customThe crude liquid was purified by flash chromatography (silica, ethyl acetate/hexanes)

출처 및 근거

ORD 기록
ord-8fb5db18e66447ec93f3327bc56d3e98
출처 데이터셋
uspto-grants-2013_06
특허 번호
US08461161B2

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