Abstract:

The ¹H and ¹³C NMR chemical shifts of the title compounds 1～3 were assigned  in this article by using 1D and 2D techniques, including ¹H, ¹³C , DEPT, ¹H-¹H DQF-COSY, ¹³C-¹H COSY, COLOC and ¹H-¹H NOESY spectra. Alkyl groups show considerab le effects on ¹H chemical shifts of the benzene and ¹³C chemical  shifts of the d ioxolane. The shift parameters of methyl and propyl substituent effects on the ¹³C chemical shifts of dioxolane are as follows: 8.12(α), 5.7(β), -1.1(γ)a nd 11.57(α), 4.77(β), 0.17(γ), respectively. The stereo-structures of  the synthetic compound 2 and 3, which are widely used in agriculture as a  kind of pow erful pesticides and fungicides, were elucidated by ¹H-¹H NOESY exp eriments.

Key words: 1-[2-(2,4-dichlorophenyl)-4-alkyl-1,3-dioxolan-2-yl-methyl]-1H-1,2,4-Triazole,  ¹H NMR,  ¹³C NMR