Triethylamine → HCID 14390307, compound

HRID 2073023Notes

Reaction equation

HRID 2073023 reaction equation
C(Cl)(=O)C(Cl)=O.[Br: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.[NH2:27][C:28]1[CH:33]=[CH:32][CH:31]=[CH:30][N:29]=1.C(N(CC)CC)C>CN(C)C=O>[Br:7][C:8]1[CH:9]=[CH:10][C:11]([C:14]2[N:22]([CH2:23][C:24]([NH:27][C:28]3[CH:33]=[CH:32][CH:31]=[CH:30][N:29]=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

6

Reactant 4

HCID 8471TriethylamineHCID 104392-AminopyridineHCID 65578Oxalyl chlorideHCID 143904564-bromophenyl-3H-imidazo[4,5-b]pyridine-3-acetic acid

Product 1

HCID 14390307HCID 14390307, compoundYield 47%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent2×

Procedure

Under a nitrogen atmosphere, oxalyl chloride (3.4 g, 0.027 mole) was added dropwise (slowly) to a stirred and chilled (10° C.) suspension of 2-(4-bromophenyl)-3H-imidazo[4,5-b]pyridine-3-acetic acid (8.4 g, 0.025 mole) in anhydrous dimethylformamide (50 ml). The reaction mixture was heated at 55°-60° C. for 4 hours, cooled to room temperature, and added dropwise to a stirred and chilled (10° C.) solution of 2-aminopyridine (2.6 g, 0.028 mole) and triethylamine (5.4 g, 0.0053 mole) in anhydrous dimethylformamide (100 ml). The reaction was stirred at room temperature overnight. Dimethylformamide (100 ml) was distilled off at 100 mm Hg. The residue was cooled, triturated in potassium bicarbonate solution (2×50 ml), and filtered. The filter cake was rinsed with water (2×50 ml) and recrystallized from ethanolisopropyl ether to give 4.8 g (47%) of white solid, mp 191.5°-195° C.

Workup

  1. temperaturechilled
  2. temperatureThe reaction mixture was heated at 55°-60° C. for 4 hours
  3. additionadded dropwise to
  4. stirringa stirred
  5. stirringThe reaction was stirred at room temperature overnight
  6. distillationDimethylformamide (100 ml) was distilled off at 100 mm Hg
  7. temperatureThe residue was cooled
  8. customtriturated in potassium bicarbonate solution (2×50 ml)
  9. filtrationfiltered
  10. washThe filter cake was rinsed with water (2×50 ml)
  11. customrecrystallized from ethanolisopropyl ether

Sources & evidence

ORD record
ord-b6a011e7e99542469de6ef0bdac7fa14
Source dataset
uspto-grants-1990_04
Patent number
US04914109

Reaction notes

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