Ethyl Acetate → Diethyl 2-[2-(3-methyl-4'-nitro-1,1'-biphenyl-4-yl)-2-oxoethyl]-2-(2-phenylethyl)malonate

HRID 30875

반응식

HRID 30875 반응식
[H-].[Na+].[C:3]1([CH2:9][CH2:10][CH:11]([C:17]([O:19][CH2:20][CH3:21])=[O:18])[C:12]([O:14][CH2:15][CH3:16])=[O:13])[CH:8]=[CH:7][CH:6]=[CH:5][CH:4]=1.Br[CH2:23][C:24]([C:26]1[CH:31]=[CH:30][C:29]([C:32]2[CH:37]=[CH:36][C:35]([N+:38]([O-:40])=[O:39])=[CH:34][CH:33]=2)=[CH:28][C:27]=1[CH3:41])=[O:25].C(OCC)(=O)C>O1CCCC1.O>[CH3:41][C:27]1[CH:28]=[C:29]([C:32]2[CH:37]=[CH:36][C:35]([N+:38]([O-:40])=[O:39])=[CH:34][CH:33]=2)[CH:30]=[CH:31][C:26]=1[C:24](=[O:25])[CH2:23][C:11]([CH2:10][CH2:9][C:3]1[CH:4]=[CH:5][CH:6]=[CH:7][CH:8]=1)([C:17]([O:19][CH2:20][CH3:21])=[O:18])[C:12]([O:14][CH2:15][CH3:16])=[O:13]

참가 물질

7

반응물 4

HCID 8857Ethyl AcetateHCID 24758Sodium hydrideHCID 811191,3-Diethyl 2-(2-phenylethyl)propanedioateHCID 219856882-Bromo-1-(3-methyl-4'-nitro-1,1'-biphenyl-4-yl)ethanone

생성물 1

HCID 21985780Diethyl 2-[2-(3-methyl-4'-nitro-1,1'-biphenyl-4-yl)-2-oxoethyl]-2-(2-phenylethyl)malonate수율 85.3%

시약·촉매·용매 2

HCID 962Water용매HCID 8028Tetrahydrofuran용매2회

실험 절차

To a cold suspension (0-5° C.) of 95% sodium hydride (3.53 g, 13.0 mmol) in dry tetrahydrofuran (30 mL) was slowly added diethyl 2-phenylethylmalonate (3.53 g, 13 mmol). The ice bath was removed and the reaction mixture was stirred at rt for 45 minutes. A solution of 2-bromo-1-(3-methyl-4′-nitro-1,1′-biphenyl-4-yl)ethanone (4.06 g, 12.0 mmol) in dry tetrahydrofuran (50 mL) was slowly added, and the resulting mixture was stirred at rt for about 70 h. Ethyl acetate (80 mL) and water (20 mL) were added, and the layers were separated. The organic layer was washed with water (2×30 mL), dried over magnesium sulfate, and concentrated under reduced pressure to give a dark, brown oil. This material was purified by flash chromatography (10:90 ethyl acetate/hexane) to give diethyl 2-[2-(3-methyl-4′-nitro-1,1′-biphenyl-4yl)-2-oxoethyl]-2-(2-phenylethyl)malonate as a light yellow oil (5.30 g, 82% yield). LC-MS ret. time 4.01 min, m/z 517.9 (MH+); 1H NMR (CDCl3) δ 1.23-1.35 (m, 6H), 2.41-2.50 (m, 2H), 2.56 (s, 3H), 2.59-2.66 (m, 2H), 3.71 (s, 2H), 4.21-4.32 (m, 4H), 7.13-7.19 (m, 3H), 7.22-7.30 (m, 2H), 7.49-7.55 (m, 2H), 7.73-7.82 (m, 3H), 8.31 (d, 2H).

후처리

  1. customThe ice bath was removed
  2. stirringthe resulting mixture was stirred at rt for about 70 h
  3. customthe layers were separated
  4. washThe organic layer was washed with water (2×30 mL)
  5. dry with materialdried over magnesium sulfate
  6. concentrationconcentrated under reduced pressure
  7. customto give a dark, brown oil
  8. customThis material was purified by flash chromatography (10:90 ethyl acetate/hexane)

출처 및 근거

ORD 기록
ord-28b0be453e144707b9e583b134a72f14
출처 데이터셋
uspto-grants-2008_09
특허 번호
US07423156B2

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