Tetrahedron Letters p. 357 - 360 (1983)
Update date:2022-07-30
Topics:
Mayr, Herbert
Baeuml, Englbert
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 <4+2> cycloaddition leading to 9 and suggests a stepwise <2+2> cycloaddition reaction to give 7.
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