Novel Syntheses of Decacyclene by Deoxygenating Cyclotrimerisation of Acenaphthenequinone with Zero-valent Titanium or Phosphorus Pentasulfide
作者:Klaus Zimmermann、Matthias Haenel
DOI:10.1055/s-1997-3209
日期:1997.5
Decacylene (2) was obtained in 15-21% yield by reaction of acenaphthenequinone (6) with bis(η6-biphenyl)titanium(0) (9) in toluene or diglyme at 110°C and in 18% yield by reaction of 6 with phosphorus pentasulfide in boiling toluene. The new reactions are used to attempt the conversion of 3,8-dibromoacenaphthenequinone (7) to 3,4,9,10,15,16-hexabromodecacyclene (3) which is considered to serve as a suitable precursor for the bowl-shaped polycyclic aromatic hydrocarbon C36H12 (1).
Liquid Crystals as Reaction Media. I. Photochemical Dimerization of Acenaphthylene in Cholesteric Liquid Crystal
作者:Tomoko Nakano、Hirotaka Hirata
DOI:10.1246/bcsj.55.947
日期:1982.3
The photodimerization of acenaphthylene in liquid crystalline media exhibiting cholesteric or nematic phase was studied from the view point of the stereoselectivity of the products. In the choleste...