Oxalyl chloride → HCID 22032839, Verbindung
Reaktionsgleichung
[N:1]1[CH:6]=[CH:5][CH:4]=[C:3]([O:7][C:8]2[N:16]=[CH:15][CH:14]=[CH:13][C:9]=2[C:10](O)=[O:11])[CH:2]=1.C(Cl)(=O)C([Cl:20])=O>C1COCC1>[N:1]1[CH:6]=[CH:5][CH:4]=[C:3]([O:7][C:8]2[N:16]=[CH:15][CH:14]=[CH:13][C:9]=2[C:10]([Cl:20])=[O:11])[CH:2]=1Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
To a stirred solution of 2-(pyridin-3-yloxy)-nicotinic acid (0.432 g, 2.0 mmol) in THF (15 mL) at 0° C. was added oxalylchloride (2 mL, 2M in CH2Cl2, 4.0 mmol) dropwise. The solution was stirred at room temperature for 3 h. The solvent was evaporated in vacuo to yield 2-(pyridin-3-yloxy)-nicotinoyl chloride as a solid. To a solution of 2-(pyridin-3-yloxy)-nicotinoyl chloride in 15 mL THF was added 3-trifluoromethyl-benzylidene-hydrazine (0.376 g, 2.0 mmol) in 5 mL THF and 1 mL Et3N at 0° C. The reaction mixture was refluxed for 6 h and the solvent was evaporated. The residue was purified by chromatography with EtOAc:hexanes, 1:2, yielding (0.425 g, 55%) of the title compound. 1H NMR (DMSO-d6): 12.20 (s, 1H), 8.70 (s, 1H), 8.37 (s, 1H), 8.24 (s, 1H), 8.21 (d, J=7.8 Hz, 1H), 8.01 (d, J=7.5 Hz, 1H), 7.90 (m, 2H), 7.78 (t, J=7.8 Hz, 1H), 7.41 (m, 2H), 6.43 (m, 2H).