2-Chloro-3-nitropyridine → HCID 58577473, compound

HRID 1429877Notes

Reaction equation

HRID 1429877 reaction equation
[O:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[C:2]1[NH:10][C:11]1[CH:16]=[CH:15][C:14]([NH2:17])=[CH:13][CH:12]=1.Cl[C:19]1[C:24]([N+:25]([O-:27])=[O:26])=[CH:23][CH:22]=[CH:21][N:20]=1>CN1C(=O)CCC1.O>[O:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[C:2]1[NH:10][C:11]1[CH:16]=[CH:15][C:14]([NH:17][C:19]2[C:24]([N+:25]([O-:27])=[O:26])=[CH:23][CH:22]=[CH:21][N:20]=2)=[CH:13][CH:12]=1

Participants

5

Reactant 2

HCID 796132-Chloro-3-nitropyridineHCID 4591052-(p-Aminoanilino)benzoxazole

Product 1

HCID 58577473HCID 58577473, compoundYield 43.5%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 13387N-methyl-2-pyrrolidoneSolvent

Conditions

Temperature
140 °C

Procedure

A mixture of N-(1,3-benzoxazol-2-yl)benzene-1,4-diamine (0.50 g) and 2-chloro-3-nitropyridine (0.352 g) in NMP (3.0 mL) was stirred at 140° C. for 1.5 h. After this time, the reaction mixture was cooled to ambient temperature, diluted with water (50 mL), and extracted with ethyl acetate (3×100 mL). The combined organic extracts were washed with brine (100 mL), dried (Na2SO4), filtered and concentrated under reduced pressure. The residue obtained was purified by chromatography (silica, methylene chloride to 1:9 ethyl acetate/methylene chloride) to afford N-(1,3-benzoxazol-2-yl)-N′-(3-nitropyridin-2-yl)benzene-1,4-diamine (0.335 g) as a red solid.

Workup

  1. temperatureAfter this time, the reaction mixture was cooled to ambient temperature
  2. extractionextracted with ethyl acetate (3×100 mL)
  3. washThe combined organic extracts were washed with brine (100 mL)
  4. dry with materialdried (Na2SO4)
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customThe residue obtained
  8. customwas purified by chromatography (silica, methylene chloride to 1:9 ethyl acetate/methylene chloride)

Sources & evidence

ORD record
ord-156f803677034448a026f915cbf5a2cd
Source dataset
uspto-grants-2015_01
Patent number
US08940758B2

Reaction notes

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