Diels-Alder Cycloadditions of Masked o-Benzoquinones with Alkenes.
Diels-Alder cycloadditions of 3-oxobut-1-enyl substituted orthoquinone monoketals with olefinic dienophiles furnished functionalized ortho-endo bicyclo[2.2.2]octenone derivatives with high regio- and stereoselectivities. The competition between self-dimerization and Diels-Alder cycloaddition with an external dienophile usually exists, except in the case of 5-substituted orthoquinone monoketal.
Department of Chemistry, University of Ioannina , GR-45110 Ioannina, Greece.
Effie
E
Georgopanou
Department of Chemistry, University of Ioannina , GR-45110 Ioannina, Greece.
Katerina-Irene
KI
Martini
Department of Chemistry, University of Ioannina , GR-45110 Ioannina, Greece.
Panagiotis
P
Pantazis
Department of Chemistry, University of Ioannina , GR-45110 Ioannina, Greece.
Paulos
P
Pelagias
Department of Chemistry, University of Ioannina , GR-45110 Ioannina, Greece.
Penelope
P
Voulgari
Department of Chemistry, University of Ioannina , GR-45110 Ioannina, Greece.
Lazaros P
LP
Hadjiarapoglou