A. Diaz-ortiz et al., Diels-Alder cycloaddition of 4,6-dimethyl-1,2,3-triazine with enamines, ortheir precursors, under microwave irradiation, SYNLETT, (2), 2001, pp. 236-237
4,6-Dimethyl-1,2,3-triazine undergoes Diels-Alder cycloaddition with enamin
es, derived from cyclic ketones, under microwave irradiation within 20 min.
This methodology represents a dramatic improvement on the classical method
and allows fused pyridine systems to be obtained, in some cases, in good y
ields.