Addition of cycloheptatrienylidene and diphenylcyclopropenylidene to tetracyclones
作者:Tsutomo Mitsuhashi、W. M. Jones
DOI:10.1039/c39740000103
日期:——
Addition of cycloheptatrienylidene to tetracyclones gives the benzocycloheptatrienes (9) and (10) arising from the intermediates (5) and (7) which are believed to equilibrate through the bis-norcaradiene (6); addition of 2,3-diphenylcyclopropenylidene gives products that would be expected of 1,4-addition of the carbene to the diene system.
Decompositions of Tropone Tosylhydrazone Sodium Salt in the Presence of Cyclopentadienone Derivatives. [4+2]-Type Cycloaddition Reactions of Cycloheptatrienylidene or 1,2,4,6-Cycloheptatetraene with Cyclopentadienone Derivatives
作者:Katsuhiro Saito、Hiraku Ishihara
DOI:10.1246/bcsj.58.2664
日期:1985.9
the precursor of the cyclicconjugated carbene (cycloheptatrienylidene), was decomposed in the presence of various cyclopentadienone derivatives to give endo- and exo-[4+2]-type adducts and benzotropylidene derivatives. The product ratios between the endo-[4+2]-type adducts and the exo-[4+2]-type adducts are considered to suggest that these addition reactions proceed via a cyclicconjugated allene