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CONCERTED AND STEPWISE CYCLOADDITIONS OF THE TRIPHENYLALLENYL CATION WITH CYCLOPENTADIENE
Mayr, Herbert,Baeuml, Englbert
, p. 357 - 360 (2007/10/02)
The triphenylallenyl cation (5), generated in situ under different conditions, reacts with cyclopentadiene via allyl cations 7 and 9.The exclusive formation of 7 from 12 and FSO3H proves a concerted cycloaddition leading to 9 and suggests a stepwise cycloaddition reaction to give 7.
