1H-1,2,4-Triazole → HCID 23039697, compound

Participants

Reaction Conditions

Reaction Steps

The crude product prepared in (a) is dissolved in 50 ml of absolute dimethyl sulfoxide, and 2.2 g (24 mmoles) of the sodium salt of 1,2,4-triazole are added. The reaction mixture is stirred for 16 hours at a bath temperature of 120° C. The resulting dark solution is cooled to room temperature, poured into ice water and extracted twice with ethyl acetate. The combined extracts are washed four times with half-saturated sodium chloride solution, dried over sodium sulfate, filtered and concentrated. The crude product is purified by colum chromatography (silica gel; 1:1 ethyl acetate/petroleum ether) and affords 3.2 g (=64% of theory) of a colourless oil. Boiling point 170°-175° C./0.04 mbar. 60 MHz-1H-NMR (CDCl3): δ=7.75 and 7.60 ppm (2s, 2H of the triazole); 6.9-7.5 ppm (m, 3H, aromatic); 4.8 ppm (4 lines AB spectrum, 2H, CH2N); 3.4 ppm (s, 3H, OCH3); 1.7-2.5 ##STR35## 0.7-1.5 ppm (m, 5H, CH2CH3).

Provenance & Evidence