The dynamic 1H NMRstudy of some primary carbamates in the solvents CDCl3 and CD3COCD3 between 183 and 298 K is reported. The free energies of activation, thus obtained (12.4 to 14.3 kcal mol-1), were attributed to the conformational isomerization about the N−C bond. These barriers to rotation show solvent dependence in contrast to the tertiary analogues and are lower in free energy by ca. 2−3 kcal
The present invention provides fungicidal 4-substituted-3-phenyl[(heterocyclylmethoxy)imino]methyl}-1,2,4-oxadiazol-5(4H)-one derivatives of formula (I)
wherein A represents a pyridyl or thiazole group and X1, Y1 to Y5 represent independently different substituents.