Potassium Carbonate → 4-[1-(4-chloro-3-nitrophenacyl)-1H-benzimidazol-2-yl]-furazan-3-ylamine

HRID 553350Notes

Reaction equation

HRID 553350 reaction equation
[NH:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[C:2]1[C:10]1[C:11]([NH2:15])=[N:12][O:13][N:14]=1.C(=O)([O-])[O-].[K+].[K+].[Cl:22][C:23]1[CH:32]=[CH:31][C:26]([C:27](=[O:30])[CH2:28]Br)=[CH:25][C:24]=1[N+:33]([O-:35])=[O:34]>CN(C=O)C.C(OCC)(=O)C>[Cl:22][C:23]1[CH:32]=[CH:31][C:26]([C:27](=[O:30])[CH2:28][N:3]2[C:4]3[CH:9]=[CH:8][CH:7]=[CH:6][C:5]=3[N:1]=[C:2]2[C:10]2[C:11]([NH2:15])=[N:12][O:13][N:14]=2)=[CH:25][C:24]=1[N+:33]([O-:35])=[O:34]

Participants

6

Reactant 3

HCID 11430Potassium CarbonateHCID 7385314-(1H-benzimidazol-2-yl)-1,2,5-oxadiazol-3-amineHCID 27783302-Bromo-1-(4-chloro-3-nitrophenyl)ethan-1-one

Product 1

HCID 674590044-[1-(4-chloro-3-nitrophenacyl)-1H-benzimidazol-2-yl]-furazan-3-ylamine

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

A suspension of 4-(1H-benzimidazol-2-yl)-furazan-3-ylamine (0.228 g, 1.14 mmol), potassium carbonate (0.40 g, 2.85 mmol) and 4-chloro-3-nitrophenacyl bromide (0.35 g, 1.25 mmol) in DMF (5 ml) is stirred at room temperature for 16 hours. The reaction mixture is diluted with ethyl acetate, washed with water and dried over sodium sulphate. Filtration of the sodium sulphate, concentration of the filtrate under reduced pressure and chromatography of the residue on silicagel using hexane-ethyl acetate as eluent gives the title compound as a solid, m.p. 198-200° C. (This compound is also listed as Example 66 in Table 1.)

Workup

  1. washwashed with water
  2. dry with materialdried over sodium sulphate
  3. filtrationFiltration of the sodium sulphate, concentration of the filtrate under reduced pressure and chromatography of the residue on silicagel

Sources & evidence

ORD record
ord-bc19d117a55c4630b18be9f3c39e2601
Source dataset
uspto-grants-2011_11
Patent number
USRE042890E1

Reaction notes

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