methyllithium in the presence of ethyl vinyl ether. A cyclopropane derivative was not obtained from the reaction of 9,9-dibromofluorene (III) or 9,9-dichloro-9H-tribenzo[a.c.e]cycloheptene (IV) with alkyllithium in olefin but 9,9′-bifluorenylidene (IX) and 9,9′-dibromo-9,9′-bifluorenyl (XI) were produced from III and 9-methylene-9H-tribenzo[a.c.e]cycloheptene (XXIII) and 9H-tribenzo-[a.c.e]-cyclohepten-9-ol
The Acid-catalyzed Reaction of 9-Fluorenol with 9-Alkylidenefluorenes
作者:S. Wawzonek、E. Dufek
DOI:10.1021/ja01595a071
日期:1956.7
Synthesis of bifluorenes via cobalt halide radical coupling
作者:Malik H. Al-Afyouni、Tiffany A. Huang、Fernando Hung-Low、Christopher A. Bradley
DOI:10.1016/j.tetlet.2011.03.127
日期:2011.6
Reaction of in situ generated lithium fluorenide salts with cobalt chloride results in formation of the corresponding bifluorenes. The scope of fluorenes that can be coupled include those containing substituents amenable to polymerization for application to poly(bifluorene) synthesis and alkyl substituted fluorenes for use in the preparation of bimetallic transition metal complexes. Based on experiments