Synthesis of 2-pyridylpyridines via Aza-Diels-Alder reactions between 3-pyridyl-1,2,4-triazines and some vinyl alkanoates

New synthetic procedure for 2,omega-bipyridines involving aza-Diels-Alder reaction between 3-(omega-pyridyl)-1,2,4-triazine and vinyl octanoate or decanoate as a dienophile is described.