Dications of Fluorenylidenes. The Relationship between Redox Potentials and Antiaromaticity for Meta- and Para-Substituted Diphenylmethylidenefluorenes
作者:Nancy S. Mills、Cornelia Tirla、Michele A. Benish、Amber J. Rakowitz、Lisa M. Bebell、Caroline M. M. Hurd、Anna L. M. Bria
DOI:10.1021/jo051599u
日期:2005.12.1
donation in these systems. A strong correlation between NICS and σ constants suggests that factors that affect the magnitude of the charge on the benzylic (α) carbon of the diphenylmethylcation affect the antiaromaticity of the fluorenyl cation. Calculated atomic charges on carbons 1−8 and 10−13 show an increase in positivecharge, and therefore greater delocalization of charge in the fluorenyl system
Palladium catalyzed atom-economic synthesis of functionalized 9-(diarylmethylene)-9H-fluorenes using triarylbismuths in one-pot bis-coupling process
作者:Maddali L.N. Rao、Priyabrata Dasgupta
DOI:10.1016/j.tetlet.2011.10.156
日期:2012.1
An efficient palladium catalyzed atom-economic synthesis of functionalized 9-(diarylmethylene)-9H-fluorenes has been accomplished in one-pot bis-coupling process using triarylbismuths as organometallic reagents. These bis-couplings in 1 hour short reaction time afforded various 9-(diarylmethylene)-9H-fluorenes in good to high yields. (C) 2011 Elsevier Ltd. All rights reserved.
Franco, M. Luisa T. M. B.; Herold, Bernardo J.; Evans, Jeffrey C., Journal of the Chemical Society. Perkin transactions II, 1988, p. 443 - 450
作者:Franco, M. Luisa T. M. B.、Herold, Bernardo J.、Evans, Jeffrey C.、Rowlands, Christopher C.