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Sulfuric acid magnesium salt (1:1) → methyl 4-[3-[(E)-(1-benzylindol-2-yl)methylideneamino]oxypropoxy]-2-hydroxybenzoate

HRID 1392278
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HRID 1392278 반응식
[CH3:1][O:2][C:3](=[O:17])[C:4]1[CH:9]=[CH:8][C:7]([O:10][CH2:11][CH2:12][CH2:13][O:14][NH2:15])=[CH:6][C:5]=1[OH:16].[CH2:18]([N:25]1[C:33]2[C:28](=[CH:29][CH:30]=[CH:31][CH:32]=2)[CH:27]=[C:26]1[CH:34]=O)[C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1.S([O-])([O-])(=O)=O.[Mg+2]>C(Cl)Cl>[CH3:1][O:2][C:3](=[O:17])[C:4]1[CH:9]=[CH:8][C:7]([O:10][CH2:11][CH2:12][CH2:13][O:14]/[N:15]=[CH:34]/[C:26]2[N:25]([CH2:18][C:19]3[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=3)[C:33]3[C:28]([CH:27]=2)=[CH:29][CH:30]=[CH:31][CH:32]=3)=[CH:6][C:5]=1[OH:16]
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참가 물질

5

반응물 3

HCID 24083Sulfuric acid magnesium salt (1:1)HCID 129167171-benzyl-1H-indole-2-carbaldehydeHCID 691961504-(3-Aminooxy-propoxy)-2-hydroxy-benzoic acid methyl ester

생성물 1

HCID 87729992methyl 4-[3-[(E)-(1-benzylindol-2-yl)methylideneamino]oxypropoxy]-2-hydroxybenzoate수율 36%

시약·촉매·용매 1

HCID 6344Dichloromethane
용매

실험 절차

To a solution of 4-(3-aminooxy-propoxy)-2-hydroxy-benzoic acid methyl ester (0.17 g, 0.69 mmol) and 1-benzyl-1H-indole-2-carbaldehyde (0.16 g, 0.69 mmol) in methylene chloride (10 mL) was added anhydrous magnesium sulfate (0.04 g). The mixture was allowed to stir at ambient temperature overnight, then heated to reflux for 1 hour and allowed to cool back to ambient temperature. The mixture was filtered and the filtrate was concentrated under reduced pressure. The crude material was purified by flash chromatography through silica gel using ethyl acetate/hexanes (0/100 gradient to 20/80) to give 4-[3-({[(1E)-(1-benzyl-1H-indol-2-yl)methylidene]amino}oxy)propoxy]-2-hydroxybenzoic acid methyl ester (0.11 g, 36%) as a white solid. 1H NMR (400 MHz, CDCl3); δ 10.94 (s, 1H), 8.16 (s, 1H), 7.70 (d, 1H), 7.63 (d, 1H), 7.28-7.17 (m, 5H), 7.11 (t, 1H), 7.00 (d, 2H), 6.78 (s, 1H), 6.41 (s, 1H), 6.39 (d, 1H), 5.72 (s, 2H), 4.21 (t, 2H), 3.98 (t, 2H), 3.89 (s, 3H), 2.03 (m, 2H).

후처리

  1. temperatureheated
  2. temperatureto reflux for 1 hour
  3. temperatureto cool back to ambient temperature
  4. filtrationThe mixture was filtered
  5. concentrationthe filtrate was concentrated under reduced pressure
  6. customThe crude material was purified by flash chromatography through silica gel

출처 및 근거

ORD 기록
ord-296ab8fc83b140629fe490ea2b372367
출처 데이터셋
uspto-grants-2008_03
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US07342039B2

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