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  • Title: Hydrogen bond-assisted 6π-azaelectrocyclization of penta-2,4-dienamides: synthesis of dihydropyridin-2(3H)-ones.
    Author: Liu X, Zhang N, Yang J, Liang Y, Zhang R, Dong D.
    Journal: J Org Chem; 2013 Apr 05; 78(7):3323-8. PubMed ID: 23445321.
    Abstract:
    A facile and efficient synthesis of substituted dihydropyridin-2(3H)-ones is developed from penta-2,4-dienamides, in which an intramolecular C-N bond was formed through thermal 6π-azaelectrocyclization. The intramolecular hydrogen bonding-assisted cyclization reaction opens access to a variety of dihydropyridin-2(3H)-ones.
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