4-Trifluoromethyl-1,2-phenylenediamine → HCID 11646459, compound

HRID 1497485Notes

Reaction equation

HRID 1497485 reaction equation
[Cl:1][C:2]1[C:3]([C:8]2[CH:16]=[CH:15][C:11]([C:12](O)=O)=[CH:10][CH:9]=2)=[N:4][CH:5]=[CH:6][CH:7]=1.[F:17][C:18]([F:28])([F:27])[C:19]1[CH:20]=[C:21]([NH2:26])[C:22]([NH2:25])=[CH:23][CH:24]=1>>[Cl:1][C:2]1[C:3]([C:8]2[CH:16]=[CH:15][C:11]([C:12]3[NH:26][C:21]4[CH:20]=[C:19]([C:18]([F:17])([F:27])[F:28])[CH:24]=[CH:23][C:22]=4[N:25]=3)=[CH:10][CH:9]=2)=[N:4][CH:5]=[CH:6][CH:7]=1

Participants

3

Reactant 2

HCID 5208224-Trifluoromethyl-1,2-phenylenediamineHCID 221704544-(3-Chloropyridin-2-yl)benzoic acid

Product 1

HCID 11646459HCID 11646459, compoundYield 77.1%

Procedure

A solution of 0.70 g (3.0 mmol) 4-(3-chloropyridin-2-yl)benzoic acid and 0.44 g (2.5 mmol) 4-trifluoromethylbenzene-1,2-diamine in 10 mL polyphosphoric acid was stirred for 5 min and irradiated for 15 min with microwaves in a microwave reactor (Initiator Sixty, Biotage). After cooling to room temperature, 20 mL distilled water was added to the solution which was then adjusted to a neutral pH value with NaOH. The precipitates thus obtained was filtered and separated using column chromatography (developing solvent: chloroform/methanol=30/1) to produce 0.72 g of 2-[4-(3-chloropyridin-2-yl)phenyl]-6-trifluoromethyl-1H-benzoimidazole (yield 77%).

Workup

  1. customirradiated for 15 min with microwaves in a microwave reactor (Initiator Sixty, Biotage)
  2. distillation20 mL distilled water
  3. additionwas added to the solution which
  4. customThe precipitates thus
  5. customobtained
  6. filtrationwas filtered
  7. customseparated

Sources & evidence

ORD record
ord-71b0cd766b384cacbce7f0b95609421d
Source dataset
uspto-grants-2015_12
Patent number
US09199965B2

Reaction notes

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