Dimethylformamide → 2-Methoxy-6-(1,2,4-triazol-1-yl)-benzonitrile
Reaktionsgleichung
[CH3:1][O:2][C:3]1[CH:10]=[CH:9][CH:8]=[C:7](F)[C:4]=1[C:5]#[N:6].N1C=[C-:15][N:14]=[N:13]1.[Na+].[CH3:18][N:19](C)C=O>>[CH3:1][O:2][C:3]1[CH:10]=[CH:9][CH:8]=[C:7]([N:14]2[CH:15]=[N:19][CH:18]=[N:13]2)[C:4]=1[C:5]#[N:6]Komponenten
4
Reaktionsbedingungen
- Temperatur
- 0 °C
Versuchsvorschrift
A solution of 30.2 g (0.20 mol) of 2-methoxy-6-fluorobenzonitrile [preparation: J. Heterocycl. Chem. 25 (1988), 1173]in 50 ml of N,N-dimethylformamide is added dropwise at 45°-50° C., under nitrogen, to a solution of 0.21 mol of sodium triazolide (prepared from equimolar amounts of triazol and sodium hydride) in 100 ml of N,N-dimethylformamide, and the mixture is stirred for 2 h at 0° C. After the solvent has been evaporated under reduced pressure, the residue is stirred with 200 ml of ice water, the pH is brought to 6 with a little glacial acetic acid and the solid is filtered off under suction and dried. After the addition of a little ether, 35 g of the product of melting point 169°-171° C. (decomposition) are obtained.