Regioselectivity of nucleophilic attack on the reactions of 1,2,4-triazine 4-oxides with certain C-nucleophiles

Article abstract of DOI:10.1023/B:COHC.0000044574.23114.58

The addition of CH-active compounds to 6-aryl-1,2,4-triazine 4-oxide is reversible and occurs under conditions of kinetic control at position 5 of the heterocycle to form cyclic C(5)-σ^H adducts. Under conditions of thermodynamic control the nuc