Hydrochloric Acid → 5-Chloro-3-hydroxy-3-(2-methoxy-6-methylphenyl)-1,3-dihydro-2H-indol-2-one

HRID 983526Notes

Reaction equation

HRID 983526 reaction equation
[Mg:1].[Br:2][C:3]1[C:8]([CH3:9])=[CH:7][CH:6]=[CH:5][C:4]=1[O:10][CH3:11].[Cl:12][C:13]1[CH:14]=[C:15]2[C:19](=[CH:20][CH:21]=1)[NH:18][C:17](=[O:22])[C:16]2=[O:23].Cl.C1[CH2:29][O:28]CC1>>[CH3:29][O:28][C:13]1[CH:21]=[CH:20][CH:19]=[C:15]([CH3:16])[C:14]=1[Mg:1][Br:2].[Cl:12][C:13]1[CH:14]=[C:15]2[C:19](=[CH:20][CH:21]=1)[NH:18][C:17](=[O:22])[C:16]2([OH:23])[C:3]1[C:8]([CH3:9])=[CH:7][CH:6]=[CH:5][C:4]=1[O:10][CH3:11]

Participants

7

Reactant 5

HCID 313Hydrochloric AcidHCID 8028Tetrahydrofuran3×HCID 872035-chloro-1H-indole-2,3-dioneHCID 5462224MagnesiumHCID 117902332-Bromo-3-methoxytoluene

Product 2

HCID 225609215-Chloro-3-hydroxy-3-(2-methoxy-6-methylphenyl)-1,3-dihydro-2H-indol-2-oneHCID 178489966HCID 178489966, compound

Procedure

A solution of 2-methoxy-6-methylphenyl-magnesium bromide is prepared starting with 2.2 g of magnesium in 10 ml of THF and a solution of 16 g of 1-bromo-2-methoxy-6-methylbenzene in 40 ml of THF. This solution is added dropwise at RT to a mixture of 6 g of 5-chloro-1H-indole-2,3-dione in 50 ml of THF and the resulting mixture is then refluxed for 1 hour. After cooling to RT, the reaction mixture is poured into 200 ml of 3N HCl solution and extracted with EtOAc, the organic phase is washed with water and dried over Na2SO4, and the solvent is evaporated off under vacuum. 5.7 g of the expected product are obtained after crystallization from iso ether.

Workup

  1. temperaturethe resulting mixture is then refluxed for 1 hour
  2. extractionextracted with EtOAc
  3. washthe organic phase is washed with water
  4. dry with materialdried over Na2SO4
  5. customthe solvent is evaporated off under vacuum

Sources & evidence

ORD record
ord-fbec7e349bd94bf79c9d71939d250004
Source dataset
uspto-grants-2005_03
Patent number
US06864277B2

Reaction notes

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