ChemInform Abstract: Hydrogen Bond‐Assisted 6π‐Azaelectrocyclization of Penta‐2, 4‐dienamides: Synthesis of Dihydropyridin‐2(3H)‐ones. Issue 33 (25th July 2013) - Liu, Xu; Zhang, Ning; Yang, Jiming; Liang, Yongjiu; Zhang, Rui; Dong, Dewen