Ethyl bromoacetate → HCID 15886912, compound

HRID 1530945Notes

Reaction equation

HRID 1530945 reaction equation
[Br:1][C:2]1[CH:3]=[CH:4][C:5]2[N:6]3[CH:18]=[C:17]([CH2:19][C:20]4[CH:21]=[N:22][CH:23]=[CH:24][CH:25]=4)[C:16](=[O:26])[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[CH2:34][C:35]([O:37][CH2:38][CH3:39])=[O:36]>CS(C)=O>[Br:1][C:2]1[CH:3]=[CH:4][C:5]2[N:6]3[CH:18]=[C:17]([CH2:19][C:20]4[CH:21]=[N:22][CH:23]=[CH:24][CH:25]=4)[C:16](=[O:26])[C:8]4[CH:9]=[C:10]([O:15][CH2:34][C:35]([O:37][CH2:38][CH3:39])=[O:36])[CH:11]=[C:12]([C:13]=2[CH:14]=1)[C:7]3=4

Participants

5

Reactant 3

HCID 7748Ethyl bromoacetateHCID 11430Potassium CarbonateHCID 1588691010-bromo-2-hydroxy-5-(3-pyridylmethyl)-4H-pyrido[3,2,1-jk]carbazole-4-one

Product 1

HCID 15886912HCID 15886912, compoundYield 53%

Reagents, catalysts & solvents 1

HCID 679Dimethyl SulfoxideSolvent

Procedure

10-bromo-2-hydroxy-5-(3-pyridylmethyl)-4H-pyrido [3,2,1-jk]carbazole-4-one (13.9 g) obtained in Example 2 was suspended in dimethyl sulfoxide (500 ml), and to the suspension was added potassium carbonate (9.5 g), and the mixture was stirred at room temperature for 30 minutes. Ethyl bromoacetate (4.2 ml) was added, and the mixture was stirred at room temperature for 12 hours. The reaction mixture was poured into ice water (500 ml) and precipitated crystals were recovered by filtration. The thus obtained crude crystals were purified by silica gel flash column chromatography (eluent: methylene chloride containing 3% methanol), and the crude product was re-precipitated from chloroform-hexane and recovered by filtration to obtain the title compound (9.0 g, 53%).

Workup

  1. stirringthe mixture was stirred at room temperature for 12 hours
  2. customprecipitated crystals
  3. filtrationwere recovered by filtration
  4. customThe thus obtained crude crystals
  5. customwere purified by silica gel flash column chromatography (eluent: methylene chloride containing 3% methanol)
  6. customthe crude product was re-precipitated from chloroform-hexane
  7. filtrationrecovered by filtration

Sources & evidence

ORD record
ord-282cb6246039496785c9649d9f59aab5
Source dataset
uspto-grants-2001_03
Patent number
US06197768B1

Reaction notes

Loading…