3,4-Diaminobenzonitrile → 2-(Chloromethyl)-1H-benzo[d]imidazole-6-carbonitrile

HRID 1738698

Reaction equation

HRID 1738698 reaction equation
[NH2:1][C:2]1[CH:3]=[C:4]([CH:7]=[CH:8][C:9]=1[NH2:10])[C:5]#[N:6].Cl.[Cl:12][CH2:13][C:14](=N)OCC>C(O)C>[Cl:12][CH2:13][C:14]1[NH:1][C:2]2[CH:3]=[C:4]([C:5]#[N:6])[CH:7]=[CH:8][C:9]=2[N:10]=1

Participants

4

Reactant 2

HCID 7372853,4-DiaminobenzonitrileHCID 12470659Ethyl 2-chloroethanecarboximidate hydrochloride

Product 1

HCID 218444532-(Chloromethyl)-1H-benzo[d]imidazole-6-carbonitrileYield 54.9%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

3.42 g of 3, 4-diaminobenzonitrile and 4.06 g of ethyl chloroacetoimidate hydrochloride were dissolved in 100 ml of ethanol, and the solution was refluxed under heating for 3 hours. After cooling and distilling off the solvent, the resulting residue was dissolved in ethyl acetate, washed with water, and then dried. After distilling off the solvent, the crystals thus precipitated were collected by filtration to obtain 2.7 g of 2-chloromethyl-5-benzimidazolecarbonitrile.

Workup

  1. temperaturethe solution was refluxed
  2. temperatureunder heating for 3 hours
  3. temperatureAfter cooling
  4. distillationdistilling off the solvent
  5. dissolutionthe resulting residue was dissolved in ethyl acetate
  6. washwashed with water
  7. customdried
  8. distillationAfter distilling off the solvent
  9. customthe crystals thus precipitated
  10. filtrationwere collected by filtration

Sources & evidence

ORD record
ord-cde5458aa430487c97584e3b537c5c17
Source dataset
uspto-grants-1999_10
Patent number
US05962695

Linked notes

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