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

HRID 1936925Notes

Reaction equation

HRID 1936925 reaction equation
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]

Participants

7

Reactant 3

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

Product 1

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

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolventHCID 80711,2-DimethoxyethaneSolvent

Procedure

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 mnL). 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) δ10.5 (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 c/m−; 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.

Workup

  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 mnL)
  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)

Sources & evidence

ORD record
ord-479a0cb0e6ae4e1991592b6410a481b2
Source dataset
uspto-grants-2002_05
Patent number
US06391907B1

Reaction notes

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