1,4-Dioxane → 1-methyl-3-(4-nitro-phenylmethyl)-1H-indole-5-carboxylic acid methyl ester

HRID 1395892

반응식

HRID 1395892 반응식
[CH3:1][O:2][C:3]([C:5]1[CH:6]=[C:7]2[C:11](=[CH:12][CH:13]=1)[N:10]([CH3:14])[CH:9]=[CH:8]2)=[O:4].[N+:15]([C:18]1[CH:25]=[CH:24][C:21]([CH2:22]Br)=[CH:20][CH:19]=1)([O-:17])=[O:16].O1CCOCC1>CCOCC.C(OCC)(=O)C>[CH3:1][O:2][C:3]([C:5]1[CH:6]=[C:7]2[C:11](=[CH:12][CH:13]=1)[N:10]([CH3:14])[CH:9]=[C:8]2[CH2:22][C:21]1[CH:24]=[CH:25][C:18]([N+:15]([O-:17])=[O:16])=[CH:19][CH:20]=1)=[O:4]

참가 물질

6

반응물 3

HCID 312751,4-DioxaneHCID 660114-Nitrobenzyl bromide2회HCID 10679201Methyl 1-methyl-1H-indole-5-carboxylate

생성물 1

HCID 694489971-methyl-3-(4-nitro-phenylmethyl)-1H-indole-5-carboxylic acid methyl ester수율 58.6%

시약·촉매·용매 2

HCID 3283Diethyl Ether용매HCID 8857Ethyl Acetate용매

실험 절차

A solution of 1-methyl-1H-indole-5-carboxylic acid methyl ester (0.38 g, 2.0 mmol), prepared using procedures as described in Example 1, Ag2O (0.51 g, 2.2 mmol), 4-nitro-benzyl bromide (0.48 g, 2.2 mmol) and dioxane (6 mL) was heated to reflux for 25 hr, then more 4-nitro-benzyl bromide (0.48 g, 2.2 mmol) was added and the solution was heated at reflux an additional 4 days. After cooling to room temperature, the reaction mixture was diluted with ether (50 mL) and ethyl acetate (50 mL), washed with aq. NH4Cl (50 mL) and then brine (50 mL). The organic layer was dried over MgSO4, filtered and concentrated. The remaining residue was subjected to flash chromatography (ethyl acetate/hexane, 1:4) to provide of 1-methyl-3-(4-nitro-phenylmethyl)-1H-indole-5-carboxylic acid methyl ester (0.38 g, 58% yield). 1H NMR (400 MHz, CDCl3) δ 8.26 (s, 1H), 8.16 (d, 2H, J=8.3 Hz), 7.98 (d, 1H, J=8.3 Hz), 7.45 (d, 2H, J=8.3 Hz), 7.35 (d, 1H, J=8.3 Hz), 6.90 (s, 1H), 4.25 (s, 2H), 3.94 (s, 3H), 3.82 (s, 3H).

후처리

  1. temperaturewas heated
  2. temperatureto reflux for 25 hr
  3. temperaturethe solution was heated
  4. temperatureat reflux an additional 4 days
  5. washwashed with aq. NH4Cl (50 mL)
  6. dry with materialThe organic layer was dried over MgSO4
  7. filtrationfiltered
  8. concentrationconcentrated

출처 및 근거

ORD 기록
ord-996fba2e1ec34808b0dedbc68b5344dd
출처 데이터셋
uspto-grants-2014_12
특허 번호
US08900565B2

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