title: Syntheses of various symmetrical naphthalenophanes and anthracenophanes via a Diels-Alder reaction between syn-[2.2](5,8)phthalazinophane derivatives and some selected dienophiles as well as the synthesis of other symmetrical heterophanes.
abstract: The syntheses of various classes of unreported naphthalenophanes, anthracenophanes and heterophanes are herein reported. The key to their successful preparation depends on the synthesis of syn-4,7,14,17-tetra(phenyl and chloro)-[2.2](5,8)phthalazinophanes as well as syn-4,5,6,7,14,15,16,17-octahydro[2.2](5,8)phthalazinophane- 4,7,14,17-tetraone and 4,5,12,13-tetrakis(methoxycarbonyl)-[2.2]paracyclophane.
authors.affiliation: Department of Chemistry, Faculty of Science, El-Minia University, El-Minia, Egypt. ashraf160@yahoo.com
authors.forename: Ashraf A
authors.initials: AA
authors.lastname: Aly