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 cyclic conjugated 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 cyclic conjugated allene
Tropone tosylhydrazone 钠盐是环状共轭卡宾(环庚三亚基)的前体,在各种环戊二烯酮衍生物的存在下分解,得到内型和外型 [4+2] 型加合物和苯并托亚基衍生物。内型 [4+2] 型加合物和外型 [4+2] 型加合物之间的产物比率被认为表明这些加成反应是通过环状共轭丙二烯 (1,2,4,6-环庚四烯),它是环庚三亚基的价键异构体。加热后,[4+2] 型加合物通过脱羰反应得到苯并亚丙基衍生物,然后发生 1,5-氢转移。