Oxocarbons and related compounds. Part 28.1 Polycycle-fused dihydrobenzocyclobutenediones and benzocyclobutenediones. Synthesis of cyclobuta[c]- and cyclobuta[a]-phenanthrene-1,2-diones and cyclobuta[a]triphenylene-11,12-dione
作者:Arthur H. Schmidt、Gunnar Kircher、Jörg Zylla、Stephan Veit
DOI:10.1039/a809527b
日期:——
The Diels–Alder reaction of semisquaric chloride 5 with 1-(alk-1-enyl)naphthalenes, 2-(alk-1-enyl)naphthalenes and 9-vinylphenanthrene is used to prepare dihydrocyclobuta[c]phenanthrene-1,2-diones 8a–c, dihydrocyclobuta[a]phenanthrene-1,2-diones 12a–c, and dihydrocyclobuta[a]triphenylene-11,12-dione 18, respectively. Treatment of the dihydrocyclobutaarenediones with bromine effects aromatization and opens up a route for the synthesis of cyclobuta[c]phenanthrene-1,2-diones 9a–c, cyclobuta[a]phenanthrene-1,2-diones 13a–c and cyclobuta[a]triphenylene-11,12-dione 19. The range of Diels–Alder reactions with semisquaric chloride 5 is extended to the use of 4-(prop-1-enyl)-1,2-dihydronaphthalene 14. Tetrahydrocyclobuta[a]phenanthrene-1,2-dione 15 is obtained in 69% yield, which can be oxidized, stepwise or at once, to give cyclobuta[a]phenanthrene-1,2-dione 13b in good yields.
半方氯化物5与1-(烷基-1-烯基)萘、2-(烷基-1-烯基)萘和9-乙烯基菲的Diels-Alder反应用于制备二氢环丁[c]菲-1,2-二酮分别为8a-c、二氢环丁[a]菲-1,2-二酮12a-c和二氢环丁[a]苯并菲-11,12-二酮18。用溴处理二氢环丁芳二酮可实现芳构化,并开辟了一条合成环丁[c]菲-1,2-二酮 9a–c、环丁[a]菲-1,2-二酮 13a–c 和环丁[a]的路线。 ]苯并菲-11,12-二酮 19. 与半方氯化物 5 的狄尔斯-阿尔德反应范围扩展到使用 4-(丙-1-烯基)-1,2-二氢萘 14. 四氢环丁[a]菲-得到1,2-二酮15,收率69%,可以将其逐步或立即氧化,以良好的收率得到环丁[a]菲-1,2-二酮13b。