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Benzyl Bromide → 3(R)-Benzyl-5(S)-[5-benzyloxy-1(S)-tert-butoxycarbonylamino-3,3-dimethyl-pentyl]-2-oxotetrahydrofuran

HRID 863271
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HRID 863271 반응식
[CH2:1]([O:8][CH2:9][CH2:10][C:11]([CH3:29])([CH3:28])[CH2:12][C@@H:13]([C@H:22]1[O:26][C:25](=[O:27])[CH2:24][CH2:23]1)[NH:14][C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C[Si]([N-][Si](C)(C)C)(C)C.[Li+].[CH2:40](Br)[C:41]1[CH:46]=[CH:45][CH:44]=[CH:43][CH:42]=1>O1CCCC1>[CH2:40]([C@@H:24]1[CH2:23][C@@H:22]([C@@H:13]([NH:14][C:15]([O:17][C:18]([CH3:20])([CH3:21])[CH3:19])=[O:16])[CH2:12][C:11]([CH3:29])([CH3:28])[CH2:10][CH2:9][O:8][CH2:1][C:2]2[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=2)[O:26][C:25]1=[O:27])[C:41]1[CH:46]=[CH:45][CH:44]=[CH:43][CH:42]=1
참가 물질실험 절차후처리출처 및 근거반응 노트

참가 물질

5

반응물 3

HCID 7498Benzyl BromideHCID 2733832Lithium hexamethyldisilazaneHCID 867521045(S)-[5-Benzyloxy-1(S)-tert-butoxycarbonylamino-3,3-dimethyl-pentyl]-2-oxotetrahydrofuran

생성물 1

HCID 676254563(R)-Benzyl-5(S)-[5-benzyloxy-1(S)-tert-butoxycarbonylamino-3,3-dimethyl-pentyl]-2-oxotetrahydrofuran

시약·촉매·용매 1

HCID 8028Tetrahydrofuran
용매
4회

실험 절차

A solution of 1.76 g of 5(S)-[5-benzyloxy-1(S)-tert-butoxycarbonylamino-3,3-dimethylpentyl]-2-oxo-tetrahydrofuran in 30 ml of tetrahydrofuran is added to a mixture of 9.14 ml of a 1M lithiumbis(trimethylsilyl)amide solution in tetrahydrofuran and 30 ml of tetrahydrofuran at -78° C. under argon and the mixture is stirred for 30 min. 0.63 ml of benzyl bromide in 30 ml of tetrahydrofuran are then added dropwise. After the mixture has been stirred at -78° C. for 3.5 h, the reaction is quenched by addition of 1.6 ml of propionic acid and the mixture is diluted with diethyl ether. The organic phase is washed with a 10% aqueous citric acid solution and a 1M sodium bicarbonate solution, dried over sodium sulfate and concentrated. Purification over silica gel (mobile phase D) gives the title compound: Rf (D)=0.23; FAB-MS: (M+H)+ =496.

후처리

  1. stirringAfter the mixture has been stirred at -78° C. for 3.5 h
  2. customthe reaction is quenched by addition of 1.6 ml of propionic acid
  3. additionthe mixture is diluted with diethyl ether
  4. washThe organic phase is washed with a 10% aqueous citric acid solution
  5. dry with materiala 1M sodium bicarbonate solution, dried over sodium sulfate
  6. concentrationconcentrated
  7. customPurification over silica gel (mobile phase D)

출처 및 근거

ORD 기록
ord-71cb43efcd514b0a8aa336b0c4968d9d
출처 데이터셋
uspto-grants-1998_02
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US05719141

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