p-Toluenesulfonic acid → 3beta-Acetoxy-1alpha,2alpha-epoxy-7alpha-hydroxypregn-5-ene-20-carbaldehyde

HRID 1708773노트

반응식

HRID 1708773 반응식
[C:1]([O:4][C@H:5]1[C@@H:31]2[O:32][C@@H:30]2[C@@:29]2([CH3:33])[C:7](=[CH:8][C@@H:9]([OH:35])[C@@H:10]3[C@@H:28]2[CH2:27][CH2:26][C@@:25]2([CH3:34])[C@H:11]3[CH2:12][CH2:13][C@@H:14]2[CH:15]([CH:17]2OCC(C)(C)C[O:18]2)[CH3:16])[CH2:6]1)(=[O:3])[CH3:2].C1(C)C=CC(S(O)(=O)=O)=CC=1.C(OCC)(=O)C.CCCCCC>CC(C)=O>[C:1]([O:4][C@H:5]1[C@@H:31]2[O:32][C@@H:30]2[C@@:29]2([CH3:33])[C:7](=[CH:8][C@@H:9]([OH:35])[C@@H:10]3[C@@H:28]2[CH2:27][CH2:26][C@@:25]2([CH3:34])[C@H:11]3[CH2:12][CH2:13][C@@H:14]2[CH:15]([CH:17]=[O:18])[CH3:16])[CH2:6]1)(=[O:3])[CH3:2]

참가 물질

5

반응물 3

HCID 6101p-Toluenesulfonic acidHCID 21226206Ethyl acetate hexaneHCID 8674580220-(5,5-Dimethyl-1,3-dioxan-2-yl)-1alpha, 2alpha-epoxy-7alpha-hydroxypregna-5-en-3beta-yl acetate

생성물 1

HCID 867458133beta-Acetoxy-1alpha,2alpha-epoxy-7alpha-hydroxypregn-5-ene-20-carbaldehyde수율 67.1%

시약·촉매·용매 1

HCID 180Acetone용매2회

실험 절차

In 4 ml of acetone was dissolved 4.9 mg (0.01 mmole) of 20-(5,5-dimethyl-1,3-dioxan-2-yl)-1α,2α-epoxy-7α-hydroxypregna-5-en-3β-yl acetate, followed by addition of 1 ml of a 1 mmol/1 solution of p-toluenesulfonic acid in acetone (containing 0.001 mmole of p-toluenesulfonic acid). The mixture was stirred at room temperature for 12 hours. From the reaction mixture thus obtained, the solvent was distilled off under reduced pressure and the residue was diluted with methylene chloride. This methylene chloride solution was washed successively with saturated aqueous sodium hydrogen carbonate solution and saturated aqueous sodium chloride solution and dried over magnesium sulfate. The solvent was then distilled off under reduced pressure and the residue was purified by silica gel chromatography (eluent:ethyl acetate-hexane =1:5, v/v) to recover 2.7 mg of 3β-acetoxy-1α,2α-epoxy-7α-hydroxypregna-5-ene-20-carbaldehyde (yield: 67%).

후처리

  1. customFrom the reaction mixture thus obtained
  2. distillationthe solvent was distilled off under reduced pressure
  3. additionthe residue was diluted with methylene chloride
  4. washThis methylene chloride solution was washed successively with saturated aqueous sodium hydrogen carbonate solution and saturated aqueous sodium chloride solution
  5. dry with materialdried over magnesium sulfate
  6. distillationThe solvent was then distilled off under reduced pressure
  7. customthe residue was purified by silica gel chromatography (eluent

출처 및 근거

ORD 기록
ord-6aeec4984be0486b9af554a07cca6925
출처 데이터셋
uspto-grants-1994_10
특허 번호
US05359055

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