Formal [(2+2)+2] and [(2+2)+(2+2)] Nonconjugated Dienediyne Cascade Cycloadditions
作者:Yao-Ting Wu、Anthony Linden、Jay S. Siegel
DOI:10.1021/ol0514799
日期:2005.9.1
graph Fluoranthene 2 and heptacycle 3 are easily accessible from the reaction of diyne 1 and norbornadiene (NBD) in the presence of the rhodium catalyst. The unusual [(2+2)+(2+2)] adduct 3 was confirmed by the X-ray crystal structure analysis.
Synthesis of Fluoranthenes and Indenocorannulenes: Elucidation of Chiral Stereoisomers on the Basis of Static Molecular Bowls
作者:Yao-Ting Wu、Tomoharu Hayama、Kim K. Baldridge、Anthony Linden、Jay S. Siegel
DOI:10.1021/ja058391a
日期:2006.5.1
aromatics. Fluoranthenes 9 (or 13) are easily accessible in good to excellent yields (75-99%; 18 examples) from the reaction of symmetric (or asymmetric) diynes 4 and alkynes 5 (or norbornadiene) in the presence of Wilkinson's catalyst. This formal [(2+2)+2] cycloaddition can also be applied to generate various indenocorannulenes 28 from 2,3-diethynylcorannulene derivatives 27 and alkynes 5. The indenocorannulenes
Imposing Curvature on a Polyarene by Intramolecular Palladium-Catalyzed Arylation Reactions: A Simple Synthesis of Dibenzo[<i>a</i>,<i>g</i>]corannulene
作者:Helge A. Reisch、Matthew S. Bratcher、Lawrence T. Scott
DOI:10.1021/ol005755p
日期:2000.5.1
Palladium catalysis has been found to offer an effective solution-phase alternative to gas-phase flash vacuum pyrolysis as a method for converting the planar ring system of 7, 10-di(2-bromophenyl)fluoranthene (4) to that of the C(28)H(14) bowl-shaped fullerene fragment dibenzo[a,g]corannulene (5).