3-Oxo-azetidine-1-carboxylic acid tert-butyl ester → 1383372-62-0

HRID 1051157노트

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HRID 1051157 반응식
[C:1]([N:8]1[CH2:11][C:10](=[O:12])[CH2:9]1)([O:3][C:4]([CH3:7])([CH3:6])[CH3:5])=[O:2].[CH2:13]([Mg]Br)[C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1>C1COCC1>[CH2:13]([C:10]1([OH:12])[CH2:11][N:8]([C:1]([O:3][C:4]([CH3:7])([CH3:6])[CH3:5])=[O:2])[CH2:9]1)[C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1

참가 물질

4

반응물 2

HCID 15194043-Oxo-azetidine-1-carboxylic acid tert-butyl esterHCID 178419663HCID 178419663, 화합물

생성물 1

HCID 659192071383372-62-0수율 70%

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매2회

반응 조건

온도
0 °C

실험 절차

1-Boc-3-azetidinone (1) (2.0 gm, 11.68 mmol) was dissolved in dry THF (20 ml) under nitrogen and cooled to 0° C. Then the solution was added 2.0 M solution of Benzyl magnesium bromide (2) in THF (8.76 ml, 17.52 mmol) under nitrogen atmosphere. The reaction mixture was then allowed to warm to room temperature and stirred for 1 h. The reaction completion was monitored by TLC. The reaction was quenched by the addition of saturated ammonium chloride solution and extracted ethyl acetate. The organic layer was dried over anhydrous sodium sulfate, filtered and concentrated under vacuum. Crude product was then purified by column chromatography to give compound 3 (2.15 gm, 70%). 1H NMR (400 MHz, DMSOd6) δ: 1.40 (s, 9H), 2.25 (s, 2H), 4.00 (d, 2H), 4.35 (d, 2H), 6.05 (s, 1H), 7.18 (m, 3H), 7.25 (d, 2H); MS: m/z 263.90 (M+1)+.

후처리

  1. temperatureto warm to room temperature
  2. customThe reaction was quenched by the addition of saturated ammonium chloride solution
  3. extractionextracted ethyl acetate
  4. dry with materialThe organic layer was dried over anhydrous sodium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated under vacuum
  7. customCrude product was then purified by column chromatography

출처 및 근거

ORD 기록
ord-322df25e281545b387f3ece0a37662be
출처 데이터셋
uspto-grants-2016_07
특허 번호
US09388164B2

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