3-Nitrophenylboronic Acid → 5-(3-nitrophenyl)-1,3-dihydro-2H-indol-2-one

HRID 6980

反応式

HRID 6980 の反応式
Br[C:2]1[CH:3]=[C:4]2[C:8](=[CH:9][CH:10]=1)[NH:7][C:6](=[O:11])[CH2:5]2.[N+:12]([C:15]1[CH:16]=[C:17](B(O)O)[CH:18]=[CH:19][CH:20]=1)([O-:14])=[O:13].C(=O)([O-])[O-].[K+].[K+]>COCCOC.O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[N+:12]([C:15]1[CH:20]=[C:19]([C:2]2[CH:3]=[C:4]3[C:8](=[CH:9][CH:10]=2)[NH:7][C:6](=[O:11])[CH2:5]3)[CH:18]=[CH:17][CH:16]=1)([O-:14])=[O:13]

参加物

7

反応物 3

HCID 16773-Nitrophenylboronic AcidHCID 11430Potassium CarbonateHCID 6111935-Bromo-2-oxindole

生成物 1

HCID 102206615-(3-nitrophenyl)-1,3-dihydro-2H-indol-2-one収率 65%

試薬・触媒・溶媒 3

HCID 178418397HCID 178418397、化合物触媒HCID 962Water溶媒HCID 80711,2-Dimethoxyethane溶媒

実験手順

5-bromo-2-indolinone (1.08 g, 5.09 mmol) and tetrakistriphenyl phosphine Pd (0) (0.273 g) were stirred under an atmosphere of nitrogen in ethylene glycol dimethyl ether (35 mL). After 15 minutes, 3-nitrophenyl boronic acid (1.70 g, 10.2 mmol) was added, followed by potassium carbonate (4.24 g, 30.7 mmol) in water (15 mL). The reaction was heated to reflux overnight, cooled to room temperature and then filtered. Saturated ammonium chloride was added. The water layer was extracted with ethyl acetate (3×20 mL). The combined organic layer was dried with MgSO4, filtered, and solvent removed in vacuo. The product was purified by flash silica gel chromatography (3:2 hexane; ethyl acetate) to give 5-(3-Nitro-phenyl)-1,3-dihydro-indol-2-one (0.084 g, 65%), Mp=269° C.; 1H NMR (DMSO) δ 10.5 (s, 1H), 8.38–8.36 (m, 1H) 8.17–8.14 (m, 1H), 8.10–8.07 (m, 1H), 7.75–7.60 (m, 3H), 6.95 (d, 1H, J=8.1 Hz), 3.57 (s, 2H); IR (KBr) 3420, 3190, 1700 cm−1; MS (EI) m/z 253 (M−H)−; CHN calculated for C14H10N2O: C, 66.14; H, 3.96; N, 11.02; Found: C, 64.59; H, 4.16; N, 9.43.

後処理

  1. temperatureThe reaction was heated
  2. temperatureto reflux overnight
  3. filtrationfiltered
  4. additionSaturated ammonium chloride was added
  5. extractionThe water layer was extracted with ethyl acetate (3×20 mL)
  6. dry with materialThe combined organic layer was dried with MgSO4
  7. filtrationfiltered
  8. customsolvent removed in vacuo
  9. customThe product was purified by flash silica gel chromatography (3:2 hexane; ethyl acetate)

出典と根拠

ORDレコード
ord-73b578707101440ab23e494441247e5a
出典データセット
uspto-grants-2006_08
特許番号
US07084168B2

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