125319-48-4Relevant academic research and scientific papers
o-Pleiadienequinones. Part 3. Ring Enlargement of o-Pleiadienequinones with Diazoalkanes
Ikuina, Junichi,Yoshida, Kazuo,Tagata, Hiroshi,Kumakura, Shigekazu,Tsunetsugu, Josuke
, p. 1305 - 1310 (2007/10/02)
The reactions of o-pleiadienequinones (1) and (2) with various diazoalkanes are described.In the absence of catalyst pyrazoline derivatives (3) and (4) were obtained.In the presence of Lewis acid catalysts ring-enlarged cyclo-octanaphthalenones (5a), (6), and (7a) were obtained, achieving syntheses of the first known higher analogues of phenalenone.The reaction of the quinone (2) with trimethylsilyldiazomethane gave cyclo-octanaphthalenedione (8).The physical properties of these compounds are described and the mechanism of formation is discussed.The quinone (1) formed 1:1 complexes with divalent metal ions.
