- Synthesis of Fluorenes Starting from 2-Iodobiphenyls and CH2Br2 through Palladium-Catalyzed Dual C-C Bond Formation
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A facile and efficient approach is developed for the synthesis of fluorene and its derivatives starting from 2-iodobiphenyls and CH2Br2. A range of fluorene derivatives can be synthesized under relatively mild conditions. The reaction proceeds via a tandem palladium-catalyzed dual C-C bond formation sequence through the key dibenzopalladacyclopentadiene intermediates, which are obtained from 2-iodobiphenyls through palladium-catalyzed C-H activation.
- Shi, Guangfa,Chen, Dushen,Jiang, Hang,Zhang, Yu,Zhang, Yanghui
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p. 2958 - 2961
(2016/07/06)
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- Synthesis of fluorene and indenofluorene compounds: Tandem palladium-catalyzed suzuki cross-coupling and cyclization
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Figure Presented "Fluor" it: Palladium-catalyzed tandem reactions, in which C(sp3)-H bond activation is the key step (see scheme; DMA = dimethylacetamide), lead to substituted fluorenes and indenofluorenes through annulation in high yield and i
- Liu, Tao-Ping,Xing, Chun-Hui,Hu, Qiao-Sheng
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supporting information; experimental part
p. 2909 - 2912
(2010/08/04)
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- Preparation process of fluorenes
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A tetrahydrofluorene, which is represented by the following formula (I) wherein R1to R6each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, or R1and R2are combined together to represent ═O, ═N or ═S, R7and R8each independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, a halogen atom, a hydroxyl group or a carboxyl group, is subjected to a hydrogen transfer reaction in the presence of a hydrogen acceptor and a catalyst, whereby a fluorene and a hydride of the hydrogen acceptor are formed at the same time.
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