Sulfuric Acid → (2S,4R)-1-allyloxycarbonyl-4-methanesulfonyloxypyrrolidine-2-methanol

HRID 1034528노트

반응식

HRID 1034528 반응식
[CH2:1]([O:4][C:5]([N:7]1[CH2:11][C@H:10]([O:12][S:13]([CH3:16])(=[O:15])=[O:14])[CH2:9][C@H:8]1[C:17](OC)=[O:18])=[O:6])[CH:2]=[CH2:3].[BH4-].[Na+].S(=O)(=O)(O)O>O1CCCC1.C(O)C>[CH2:1]([O:4][C:5]([N:7]1[CH2:11][C@H:10]([O:12][S:13]([CH3:16])(=[O:14])=[O:15])[CH2:9][C@H:8]1[CH2:17][OH:18])=[O:6])[CH:2]=[CH2:3]

참가 물질

6

반응물 3

HCID 1118Sulfuric AcidHCID 4311764Sodium borohydrideHCID 10733517(2S,4R)-N-allyloxycarbonyl-4-methanesulfonyloxyproline methyl ester

생성물 1

HCID 18639172(2S,4R)-1-allyloxycarbonyl-4-methanesulfonyloxypyrrolidine-2-methanol수율 93.5%

시약·촉매·용매 2

HCID 702Ethanol용매HCID 8028Tetrahydrofuran용매

실험 절차

To a solution of (2S,4R)-1-allyloxycarbonyl-4-methanesulfonyloxy-2-methoxycarbonylpyrrolidine (27.12 g: 74.0 mmole) in a mixture of tetrahydrofuran (94 ml) and ethanol (140 ml), sodium borohydride (12 g: 31.7 mmole) is added in a nitrogen atmosphere under ice cooling. The mixture is stirred for 4 hours at room temperature. To the reaction mixture concentrated sulfuric acid (8.8 ml: 158.4 mmole) is added dropwise under ice cooling. The reaction mixture is concentrated to half a volume in vacuo, and diluted with ethyl acetate (100 ml) and ice water (100 ml). The organic layer is taken, successively washed with aqueous sodium hydrogen carbonate and saturated brine, dried over magnesium sulfate, and concentrated in vacuo to give (2S,4R)-1-allyloxycarbonyl-4-methanesulfonyloxypyrrolidine-2-methanol (19.33 g). Yield: 77%. Colorless oil. NMR δ(CDCl3) ppm: 1.9 to 2.1(m, 1H), 2.3 to 2.5(m, 1H), 3.05(s, 3H), 3.5 to 3.7(m, 2H), 3.7 to 4.1(m, 2H), 4.1 to 4.3(m, 1H), 4.6(m, 2H), 5.2 to 5.4(m, 3H), 5.8 to 6.1(m, 1H).

후처리

  1. additionis added in a nitrogen atmosphere under ice cooling
  2. concentrationThe reaction mixture is concentrated to half a volume in vacuo
  3. additiondiluted with ethyl acetate (100 ml) and ice water (100 ml)
  4. washsuccessively washed with aqueous sodium hydrogen carbonate and saturated brine
  5. dry with materialdried over magnesium sulfate
  6. concentrationconcentrated in vacuo

출처 및 근거

ORD 기록
ord-ff0cdf2580e84edc99121273787baf22
출처 데이터셋
uspto-grants-1994_05
특허 번호
US05317016

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