m-Chloroperbenzoic acid → tert-Butyl 6-Oxa-3-azabicyclo(3.1.0)hexane-3-carboxylate

HRID 241331

반응식

HRID 241331 반응식
[C:1]([O:5][C:6]([N:8]1[CH2:12][CH:11]=[CH:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].C1C=C(Cl)C=C(C(OO)=[O:21])C=1>C(Cl)Cl>[C:1]([O:5][C:6]([N:8]1[CH2:12][CH:11]2[CH:10]([O:21]2)[CH2:9]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

참가 물질

4

반응물 2

HCID 70297m-Chloroperbenzoic acidHCID 5148195tert-Butyl 2,5-dihydro-1H-pyrrole-1-carboxylate

생성물 1

HCID 10103880tert-Butyl 6-Oxa-3-azabicyclo(3.1.0)hexane-3-carboxylate수율 87%

시약·촉매·용매 1

HCID 6344Dichloromethane용매

실험 절차

2,5-Dihydro-pyrrole-1-carboxylic acid tert-butyl ester (46 g, 65% purity) was dissolved in CH2Cl2 (500 mL). The solution was cooled to 0° C. mCPBA (122 g, 2 eq, 77% purity) was slowly added to the solution at 0° C. The reaction mixture was stirred at 0° C. to RT for overnight. The mixture was concentrated to 200 ml, and filtered. The organic phase was washed with 1 N NaOH solution (4×100 mL), dried over Na2SO4. The resulting oil was purified by column chromatography (hexane:ethyl acetate 3:1) to give 28 g of desired product as a colorless oil (87% yield). 1H-NMR (300 MHz, CDCl3): δ 1.41 (s, 9H), 3.26 (dd, 2H), 3.25-3.80 (m, 4H)

후처리

  1. additionwas slowly added to the solution at 0° C
  2. concentrationThe mixture was concentrated to 200 ml
  3. filtrationfiltered
  4. washThe organic phase was washed with 1 N NaOH solution (4×100 mL)
  5. dry with materialdried over Na2SO4
  6. customThe resulting oil was purified by column chromatography (hexane:ethyl acetate 3:1)

출처 및 근거

ORD 기록
ord-f052fa83e1e540799f284b5912c7d59e
출처 데이터셋
uspto-grants-2014_02
특허 번호
US08648197B2

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