Triethylamine → N-[4-(Pyrrolo[1,2-a]quinoxalin-5(4H)-ylcarbonyl)phenyl]-2,3-dichlorobenzamide

HRID 1739910Notes

Reaction equation

HRID 1739910 reaction equation
[NH2:1][C:2]1[CH:22]=[CH:21][C:5]([C:6]([N:8]2[C:17]3[C:12](=[CH:13][CH:14]=[CH:15][CH:16]=3)[N:11]3[CH:18]=[CH:19][CH:20]=[C:10]3[CH2:9]2)=[O:7])=[CH:4][CH:3]=1.C(N(CC)CC)C.[Cl:30][C:31]1[C:39]([Cl:40])=[CH:38][CH:37]=[CH:36][C:32]=1[C:33](Cl)=[O:34]>ClCCl>[CH:18]1[N:11]2[C:12]3[C:17]([N:8]([C:6]([C:5]4[CH:4]=[CH:3][C:2]([NH:1][C:33](=[O:34])[C:32]5[CH:36]=[CH:37][CH:38]=[C:39]([Cl:40])[C:31]=5[Cl:30])=[CH:22][CH:21]=4)=[O:7])[CH2:9][C:10]2=[CH:20][CH:19]=1)=[CH:16][CH:15]=[CH:14][CH:13]=3

Participants

5

Reactant 3

HCID 8471Triethylamine2×HCID 179442,3-Dichlorobenzoyl chloride2×HCID 218370054,5-Dihydro-5-(4-aminobenzoyl)pyrrolo[1,2-a]quinoxaline

Product 1

HCID 21837108N-[4-(Pyrrolo[1,2-a]quinoxalin-5(4H)-ylcarbonyl)phenyl]-2,3-dichlorobenzamideYield 13.3%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent3×

Procedure

As described for Example 157, 0.47 g of 4,5-dihydro-5-(4-aminobenzoyl)pyrrolo[1,2-a]quinoxaline, 346 μl of triethylamine and 5 ml of dichloromethane are chilled (ice bath) and 0.415 g of 2,3-dichlorobenzoyl chloride in 2 ml of dichloromethane added. After stirring overnight, an additional 346 μl of triethylamine is added and an additional 0.415 g of 2,3-dichlorobenzoyl chloride added. The mixture is stirred for 2 hours, diluted with 50 ml of dichloromethane and the solution washed with 20 ml each of H2O, 2 N citric acid, 1 M NaHCO3 and brine. The organic layer is dried (Na2SO4) and filtered through a thin pad of hydrous magnesium silicate-and the filtrate concentrated to dryness. The residue is chromatographed on thick layer silica gel plates with ethyl acetate-hexane (1:1) as solvent to give 0.100 g of white solid, m.p. 230-240° C.

Workup

  1. additionadded
  2. stirringThe mixture is stirred for 2 hours
  3. washthe solution washed with 20 ml each of H2O, 2 N citric acid, 1 M NaHCO3 and brine
  4. dry with materialThe organic layer is dried (Na2SO4)
  5. filtrationfiltered through a thin pad of hydrous magnesium silicate-
  6. concentrationthe filtrate concentrated to dryness
  7. customThe residue is chromatographed on thick layer silica gel plates with ethyl acetate-hexane (1:1) as solvent

Sources & evidence

ORD record
ord-3b175465220e4294b03af7138ec4d52a
Source dataset
uspto-grants-1999_10
Patent number
US05968937

Reaction notes

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