Triethylamine → n-Butyl 3-(2-(methylamino)-5-nitropyridin-3-yl)acrylate

HRID 2406724Notes

Reaction equation

HRID 2406724 reaction equation
C(N(CC)CC)C.[C:8]([O:12][CH2:13][CH2:14][CH2:15][CH3:16])(=[O:11])[CH:9]=[CH2:10].C1(C)C(C(P(C(C2C(C)=CC=CC=2)=O)C(C2C(C)=CC=CC=2)=O)=O)=CC=CC=1.Br[C:46]1[C:47]([NH:55][CH3:56])=[N:48][CH:49]=[C:50]([N+:52]([O-:54])=[O:53])[CH:51]=1>C([O-])(=O)C.[Pd+2].C([O-])(=O)C.O.CN(C=O)C>[CH3:56][NH:55][C:47]1[C:46]([CH:10]=[CH:9][C:8]([O:12][CH2:13][CH2:14][CH2:15][CH3:16])=[O:11])=[CH:51][C:50]([N+:52]([O-:54])=[O:53])=[CH:49][N:48]=1

Participants

8

Reactant 4

HCID 8471TriethylamineHCID 8846Butyl Acrylate2×HCID 164772163-bromo-N-methyl-5-nitropyridin-2-amineHCID 19696886Tri(o-toluoyl)phosphine2×

Product 1

HCID 77522859n-Butyl 3-(2-(methylamino)-5-nitropyridin-3-yl)acrylate

Reagents, catalysts & solvents 3

HCID 167845palladium(II) acetateCatalyst2×HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Conditions

Temperature
100 °C

Procedure

Triethylamine (32 μl), n-butyl acrylate (33 μl), tri(o-toluoyl)phosphine (24 mg), and palladium acetate (5 mg) were added to a tube containing a DMF (3 ml) solution containing 3-bromo-N-methyl-5-nitropyridin-2-amine (45 mg) and the tube was sealed, followed by stirring at 100° C. for 8 hours. The reaction solution was adjusted to room temperature, and n-butyl acrylate (33 μl), tri(o-toluoyl)phosphine (24 mg), and palladium acetate (5 mg) were added again to the tube and the tube was sealed, followed by stirring at 100° C. for 9 hours. Further, the reaction solution was adjusted to room temperature, and water was added, followed by extraction with ethyl acetate. The resultant was washed with saturated saline and dried over anhydrous sodium sulfate. Subsequently, the solvent was distilled away under reduced pressure, the obtained residue was purified by silica gel chromatography (n-hexane:ethyl acetate=16:1 to 3:1), and a yellow solid of n-butyl 3-(2-(methylamino)-5-nitropyridin-3-yl)acrylate (44 mg) was thus obtained.

Workup

  1. customthe tube was sealed
  2. customwas adjusted to room temperature
  3. customthe tube was sealed
  4. stirringby stirring at 100° C. for 9 hours
  5. customwas adjusted to room temperature
  6. extractionfollowed by extraction with ethyl acetate
  7. washThe resultant was washed with saturated saline
  8. dry with materialdried over anhydrous sodium sulfate
  9. distillationSubsequently, the solvent was distilled away under reduced pressure
  10. customthe obtained residue was purified by silica gel chromatography (n-hexane:ethyl acetate=16:1 to 3:1)

Sources & evidence

ORD record
ord-573a1bf762174e0b869f3b49e97d5531
Source dataset
uspto-grants-2014_08
Patent number
US08809371B2

Reaction notes

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