title: β-Aryl-α-nitro-α,β-enals as heterodienes and dienophiles.
abstract: As demonstrated with the β-(2-furyl)-substituted analogue 1b, β-aryl-α-nitro-α,β-enals (1) behave as heterodienes against enamines and enol ethers using their enal unit (e.g., 1b → 12). α-Nitro-α,β-enals can act as well as highly reactive dienophiles to render adducts endowed with nitrogenated quaternary centers (e.g., 1b → 15a). A hetero-Diels-Alder (HDA)/Diels-Alder (DA) sequence from 1b also proved feasible on serial treatment with ethyl vinyl ether and Danishefsky's diene (1b → 14).
authors.affiliation: Department of Organic Chemistry, University of Santiago , Campus Vida, 15782 Santiago, A Coruña, Spain.
authors.forename: Hugo
authors.initials: H
authors.lastname: Lago-Santomé
authors.forename: Patricia
authors.initials: P
authors.lastname: Martínez-Bescos
authors.forename: Marta
authors.initials: M
authors.lastname: Fernández-González
authors.forename: Lidia
authors.initials: L
authors.lastname: Ozores-Viturro
authors.forename: Fernando
authors.initials: F
authors.lastname: Cagide-Fagín
authors.forename: Ricardo
authors.initials: R
authors.lastname: Alonso