1H-1,2,4-Triazole → 1,1-bis(5-chloropyrid-2-yl)-2-(1H-1,2,4-triazol-1-yl)ethanol

Participants

Reaction Conditions

Reaction Steps

2,2-Bis(5-chloro-pyrid-2-yl)oxirane (0.8 g), 1,2,4-triazole (1.0 g) and anhydrous potassium carbonate (3.0 g) were stirred in dry N,N-dimethylformamide (30 ml) and the mixture was heated at 85° C. for 1.5 hours. The solvent was then evaporated under vacuum, with the addition of xylene to remove final traces of N,N-dimethylformamide as an azeotrope, and the residue was dissolved in water (20 ml) and extracted with ethyl acetate (3×20 ml). The combined organic extracts were dried over megnesium sulfate and evaporated. The residue was chromatographed on silica, eluting with ethyl acetate. Evaporation of the relevant fractions gave a viscous oil which solidified on trituration with petroleum ether (b.p. 60°-80° C.). Recrystallization from hexane gave the title compound as white crystals (0.48 g, 38%) m.p. 98°-100° C.

Provenance & Evidence