Sequential Formation of Yellow, Red, and Orange 1-Phenyl-3,3-Biphenylene-Allene Dimers Prior to Blue Tetracene Formation: Helicity Reversal intrans-3,4-Diphenyl-1,2-bis(fluorenylidene)cyclobutane
作者:Emilie V. Banide、Yannick Ortin、Corey M. Seward、Laura E. Harrington、Helge Müller-Bunz、Michael J. McGlinchey
DOI:10.1002/chem.200501169
日期:2006.4.12
framework is nonplanar. Deprotonation of yellow head-to-tail allenedimer 6 with tBuOK in DMSO and reprotonation with HOAc yields the [1,3]-hydrogen migration product 10, in which the proton originally on the cyclobutane ring is now sited at C9 on the exocyclic fluorenyl substituent. Analogously, deprotonation and reprotonation of orange dimer 9 furnishes [1,3]-hydrogen migration product 11. Side product
Dimerization of 9-Phenylethynylfluorene to Di-indeno-naphthacene and Dispiro-[fluorene-dihydronaphthacene- fluorene]: An X-ray Crystallographic and NMR Study
作者:Laura E. Harrington、James F. Britten、Michael J. McGlinchey
DOI:10.1021/ol049967o
日期:2004.3.1
oxidation then yields a peroxide. A dihydronaphthacene bearing fluorenyl moieties spiro-bonded at the C(5) and C(11) positions was also identified. The structures of the naphthacenes were elucidated by X-ray crystallography, and a mechanistic rationale is offered. [reaction: see text]