Intermolecular Aryne Ene Reaction of Hantzsch Esters: Stable Co-valent Ene Adducts from a 1,4-Dihydropyridine Reaction
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The reaction of arynes with 1,4-dihydropyridines affords 2-aryl-1,2-dihydropyridines or 2-methylene-3-aryl-1,2,3,4-tetrahydropyridines via a regioselective C-2 or C-3 arylation. These compounds are the first series of isolable and bench-stable covalent ene adducts formed between dihydropyridines and unsaturated substrates. Experimental studies and DFT calculations provide mechanistic support for a concerted intermolecular aryne ene process, which may have implications for NAD(P)H model reactions.
AuthorsJONES, CR; Trinchera, P; Sun, W; Smith, JE; Palomas, D; Crespo-Otero, R
- College Publications