Triethylamine → HCID 14390341, compound

HRID 1709532Notes

Reaction equation

HRID 1709532 reaction equation
C(Cl)(=O)C(Cl)=O.[Cl:7][C:8]1[CH:13]=[CH:12][C:11]([C:14]2[N:22]([CH2:23][C:24]([OH:26])=O)[C:17]3=[N:18][CH:19]=[CH:20][CH:21]=[C:16]3[N:15]=2)=[CH:10][CH:9]=1.[C:27]1([NH:33][C:34]2[CH:39]=[CH:38][CH:37]=[CH:36][CH:35]=2)[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=1.C(N(CC)CC)C>CN(C)C=O.O>[Cl:7][C:8]1[CH:9]=[CH:10][C:11]([C:14]2[N:22]([CH2:23][C:24]([N:33]([C:34]3[CH:35]=[CH:36][CH:37]=[CH:38][CH:39]=3)[C:27]3[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=3)=[O:26])[C:17]3=[N:18][CH:19]=[CH:20][CH:21]=[C:16]3[N:15]=2)=[CH:12][CH:13]=1

Participants

7

Reactant 4

HCID 8471TriethylamineHCID 11487DiphenylamineHCID 65578Oxalyl chlorideHCID 143904574-chlorophenyl-3H-imidazo[4,5-b]pyridine-3-acetic acid

Product 1

HCID 14390341HCID 14390341, compoundYield 70.1%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent2×

Conditions

Temperature
60 °C

Procedure

Under a nitrogen atmosphere, oxalyl chloride (1.73 g, 0.0137 mole) was added dropwise, slowly, to a stirred and chilled (10° C.) solution of 2-(4-chlorophenyl)-3H-imidazo[4,5-b]pyridine-3-acetic acid (3.7 g, 0.013 mole) in anhydrous dimethylformamide (50 ml). The reaction mixture was heated at 60° C. for 4 hr under nitrogen, cooled and added dropwise to a stirred and chilled (10° C.) solution of diphenylamine (2.37 g, 0.014 mole) and triethylamine (1.42 g, 0.014 mole) in anhydrous dimethylformamide (75 ml). The reaction mixture was stirred at room temperature overnight and then poured into water (400 ml). The mixture was extracted with ethyl acetate (2×75 ml). The aqueous layer was saturated with sodium chloride and extracted again with ethyl acetate (75 ml). The combined organic layers were washed with 5% potassium hydroxide solution (2×50 ml), water (50 ml) and saturated sodium chloride solution (50 ml). The combined layers were dried over sodium sulfate, filtered and concentrated under reduced pressure to give 4.0 g of an oil (70%). The oil was crystallized from isopropyl ether-isopropyl alcohol to give 2.2 g (39%) of a white solid, mp. 176°-178° C.

Workup

  1. temperaturecooled
  2. additionadded dropwise to
  3. stirringa stirred
  4. stirringThe reaction mixture was stirred at room temperature overnight
  5. extractionThe mixture was extracted with ethyl acetate (2×75 ml)
  6. extractionextracted again with ethyl acetate (75 ml)
  7. washThe combined organic layers were washed with 5% potassium hydroxide solution (2×50 ml), water (50 ml) and saturated sodium chloride solution (50 ml)
  8. dry with materialThe combined layers were dried over sodium sulfate
  9. filtrationfiltered
  10. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-2d26f6a6c3e14379aaa1b78906d76e66
Source dataset
uspto-grants-1990_08
Patent number
US04948800

Reaction notes

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