Potassium Carbonate → 10-bromo-2-(2-oxopentyloxy)-5-methyl-4H-pyrido[3,2,1-jk]carbazole-4-one

HRID 1530969Notes

Reaction equation

HRID 1530969 reaction equation
[Br:1][C:2]1[CH:3]=[CH:4][C:5]2[N:6]3[CH:18]=[C:17]([CH3:19])[C:16](=[O:20])[C:8]4[CH:9]=[C:10]([OH:15])[CH:11]=[C:12]([C:13]=2[CH:14]=1)[C:7]3=4.C(=O)([O-])[O-].[K+].[K+].Br[CH2:28][C:29](=[O:33])[CH2:30][CH2:31][CH3:32]>CS(C)=O>[Br:1][C:2]1[CH:3]=[CH:4][C:5]2[N:6]3[CH:18]=[C:17]([CH3:19])[C:16](=[O:20])[C:8]4[CH:9]=[C:10]([O:15][CH2:28][C:29](=[O:33])[CH2:30][CH2:31][CH3:32])[CH:11]=[C:12]([C:13]=2[CH:14]=1)[C:7]3=4

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 100578691-Bromopentan-2-oneHCID 2125284210-bromo-2-hydroxy-5-methyl-4H-pyrido [3,2,1-jk]carbazole-4-one

Product 1

HCID 1936491810-bromo-2-(2-oxopentyloxy)-5-methyl-4H-pyrido[3,2,1-jk]carbazole-4-oneYield 48%

Reagents, catalysts & solvents 1

HCID 679Dimethyl SulfoxideSolvent

Procedure

10-bromo-2-hydroxy-5-methyl-4H-pyrido[3,2,1-jk]carbazole-4-one (250 mg) obtained in Example 49 was suspended in dimethyl sulfoxide (10 ml), and potassium carbonate (210 mg) was added to the suspension. The mixture was stirred at room temperature for 30 minutes and 1-bromo-2-pentanone (188 mg) was added to the mixture. The mixture was stirred at room temperature for 12 hours, and the reaction mixture was poured into ice water (500 ml), and extracted with ethyl acetate. The ethyl acetate layer was washed with saturated aqueous solution of sodium chloride, and dried over anhydrous sodium sulfate, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel flash column chromatography (eluent: methylene chloride containing 2% methanol) to obtain the title compound (150 mg, 48%).

Workup

  1. stirringThe mixture was stirred at room temperature for 12 hours
  2. extractionextracted with ethyl acetate
  3. washThe ethyl acetate layer was washed with saturated aqueous solution of sodium chloride
  4. dry with materialdried over anhydrous sodium sulfate
  5. customthe solvent was evaporated under reduced pressure
  6. customThe residue was purified by silica gel flash column chromatography (eluent: methylene chloride containing 2% methanol)

Sources & evidence

ORD record
ord-60e7120d94704fe5b9bd997a2b64160b
Source dataset
uspto-grants-2001_03
Patent number
US06197768B1

Reaction notes

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