Diastereodivergent cis- and trans-fused [4+2] annulations of cyclic 1,3-dienes and 1-azadienes via ligand-controlled palladium catalysis

Diastereodivergent and asymmetric [4 + 2] annulations between cyclic 1,3-dienes and 1-azadienes via ligand-controlled Pd catalysis have been realized, furnishing both cis - and trans -fused tetrahydropyridines in good yields and stereoselectivity levels.