Dimethylformamide dimethyl acetal → (2S,4R)-4-methanesulfonyloxy-1-(4-nitrobenzyloxycarbonyl)-2-(1,2,4-thiadiazol-5-yl)pyrrolidine

HRID 846927

반응식

HRID 846927 반응식
[CH3:1][S:2]([O:5][C@H:6]1[CH2:10][N:9]([C:11]([O:13][CH2:14][C:15]2[CH:20]=[CH:19][C:18]([N+:21]([O-:23])=[O:22])=[CH:17][CH:16]=2)=[O:12])[C@H:8]([C:24](=[S:26])[NH2:25])[CH2:7]1)(=[O:4])=[O:3].CO[CH:29](OC)[N:30](C)C>>[CH3:1][S:2]([O:5][C@H:6]1[CH2:10][N:9]([C:11]([O:13][CH2:14][C:15]2[CH:16]=[CH:17][C:18]([N+:21]([O-:23])=[O:22])=[CH:19][CH:20]=2)=[O:12])[C@H:8]([C:24]2[S:26][N:30]=[CH:29][N:25]=2)[CH2:7]1)(=[O:4])=[O:3]

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3

반응물 2

HCID 78373Dimethylformamide dimethyl acetalHCID 14305069(2S, 4R)-4-methanesulfonyloxy-1-(4-nitrobenzyloxycarbonyl)-2-thiocarbamoylpyrrolidine

생성물 1

HCID 57267420(2S,4R)-4-methanesulfonyloxy-1-(4-nitrobenzyloxycarbonyl)-2-(1,2,4-thiadiazol-5-yl)pyrrolidine

실험 절차

To (2S,4R)-4-methanesulfonyloxy-1-(4-nitrobenzyloxycarbonyl)-2-thiocarbamoylpyrrolidine (1.5 g) was added N,N-dimethylformamide dimethylacetal (1.5 ml) and the mixture was stirred at room temperature for 1.5 hours. After the solvent was removed, the residue was dissolved in dichloromethane (30 ml). To the solution was added dropwise O-(mesitylenesulfonyl)hydroxylamine (1.5 g) in dichloromethane (20 ml) at 0° C. After stirring at room temperature for 2 hours, the mixture was washed with saturated aqueous sodium bicarbonate and brine successively. The dried organic layer was evaporated and the residue was subjected to a column chromatography on silica gel (30 g) eluting with a mixture of n-hexane and ethyl acetate (1:2 V/V) to give (2S,4R)-4-methanesulfonyloxy-1-(4-nitrobenzyloxycarbonyl)-2-(1,2,4-thiadiazol-5-yl)pyrrolidine (850 mg).

후처리

  1. customAfter the solvent was removed
  2. dissolutionthe residue was dissolved in dichloromethane (30 ml)
  3. additionTo the solution was added dropwise O-(mesitylenesulfonyl)hydroxylamine (1.5 g) in dichloromethane (20 ml) at 0° C
  4. stirringAfter stirring at room temperature for 2 hours
  5. washthe mixture was washed with saturated aqueous sodium bicarbonate and brine successively
  6. customThe dried organic layer was evaporated
  7. washeluting with a mixture of n-hexane and ethyl acetate (1:2 V/V)

출처 및 근거

ORD 기록
ord-0dbc7b47e1e448e2b4a219ad357c6f54
출처 데이터셋
uspto-grants-1992_08
특허 번호
US05138064

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