Palladacycles 3 + 2 cycloaddition

I have selected a number of important topics in newly developed organopalladium chemistry, and have asked researchers who have made important contributions to these fields to review them. I am pleased that most of them have kindly accepted my request. For this book I have selected recent advances (covering mainly the last five years), most of which have not previously been the object of reviews. The book I am editing will cover Pd-catalyzed reactions that are novel, and entirely different from the more standard ones. Considerable patience will be required by readers when they face and try to understand topics such as (3-carbon elimination, palladacycles, Pd/norbornene-catalyzed aromatic functionalizations, arylation of aromatics, three-component cycliza-tions of allenes, and cycloaddition of arynes, for example. I believe their efforts will be well rewarded. 

Dibenzo[a,g]corannulene (88) was prepared from fluoranthene 9 under FVP conditions at 1,000 °C (Scheme 25) [117]. Compotmd 88 was also accessed from the same material by Pd-catalyzed intramolecular arylations [16], In that report, Scott and coworkers tested various palladium catalysts, bases, and reaction conditions, and the best result (57% yield) was obtained under conditions employing the combination of palladacycle/DBU/DMF at 150 °C. A synthetic method has been reported to prepare 7,10-disubstimted fluoranthenes, including 9, in good to excellent yields by Rh-catalyzed [(2+2)+2] cycloadditions of l,8-di(ethynyl) naphthalenes 87 with NBD [118]. 

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