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Isobutyraldehyde → 2-Methyl-1-(2-nitrophenyl)propan-1-ol

HRID 333462
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HRID 333462 반응식
I[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[N+:8]([O-:10])=[O:9].C1([Mg]Cl)C=CC=CC=1.[CH:19](=[O:23])[CH:20]([CH3:22])[CH3:21]>C1COCC1>[N+:8]([C:3]1[CH:4]=[CH:5][CH:6]=[CH:7][C:2]=1[CH:19]([OH:23])[CH:20]([CH3:22])[CH3:21])([O-:10])=[O:9]
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5

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HCID 6561IsobutyraldehydeHCID 69115o-IodonitrobenzeneHCID 178478979HCID 178478979, 화합물

생성물 1

HCID 591894222-Methyl-1-(2-nitrophenyl)propan-1-ol수율 99.7%

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매

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온도
40 °C

실험 절차

To a solution of 1-iodo-2-nitrobenzene (1.12 g, 4.5 mmol) in anhydrous THF (15 mL) cooled to minus 40° C. under nitrogen atmosphere, a solution of phenylmagnesium chloride (2 M in THF, 2.4 mL, 4.8 mmol) was added dropwise at a rate that the temperature would not exceed minus 35° C. Upon completion of the addition the mixture was stirred for five minutes at minus 40° C., followed by addition of isobutyraldehyde (0.545 mL, 6.0 mmol). The mixture was gradually warmed up to room temperature, quenched with saturated ammonium chloride (6 mL), poured into water (80 mL), and extracted with ethyl acetate three times (100 mL). Combined organic phase was washed with brine (80 mL), dried over Na2SO4, and concentrated in vacuo. The residue was purified by silica gel column chromatography to yield racemic (RS)-1-(2-nitrophenyl)-2-methyl-propanol (0.876 g, 99%) as a light yellow oil. 1H NMR (400 MHz, CDCl3): δ 7.84 (dd, 1H, J=1.2 and 8.2 Hz, Ph-H), 7.73 (dd, 1 H, J=1.4 and 7.9 Hz, Ph-H), 7.61 (m, 1H, Ph-H), 7.39 (m, 1H, Ph-H), 5.03 (dd, 1H, J=4.5 and 5.8 Hz, Ph-CH), 2.42 (d, 1H, J=4.5 Hz, OH), 2.02 (m, 1H, CH), 0.95 (d, 3H, J=6.7 Hz, CH3), 0.89 (d, 3H, J=6.8 Hz, CH3); 13C NMR (100 MHz, CDCl3): δ 148.48 (C), 138.91 (C), 132.95 (CH), 128.85 (CH), 127.95 (CH), 124.21 (CH), 73.79 (CH), 34.30 (CH), 19.66 (CH3), 17.01 (CH3).

후처리

  1. customexceed minus 35° C
  2. additionUpon completion of the addition the mixture
  3. temperatureThe mixture was gradually warmed up to room temperature
  4. customquenched with saturated ammonium chloride (6 mL)
  5. additionpoured into water (80 mL)
  6. extractionextracted with ethyl acetate three times (100 mL)
  7. washCombined organic phase was washed with brine (80 mL)
  8. dry with materialdried over Na2SO4
  9. concentrationconcentrated in vacuo
  10. customThe residue was purified by silica gel column chromatography

출처 및 근거

ORD 기록
ord-823cf3c74467441ea9fee003892db5ca
출처 데이터셋
uspto-grants-2014_11
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US08877905B2

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