93318-82-2Relevant academic research and scientific papers
The photo-nazarov reaction: Scope and application
Cai, Shujun,Xiao, Zheming,Shi, Yingbo,Gao, Shuanhu
supporting information, p. 8677 - 8681 (2014/07/21)
The reaction conditions and scope of the photo-Nazarov reaction of aryl vinyl ketones were investigated. In contrast to the conventional acid-catalyzed methods, this photolytic electrocyclization proceeds in the neutral or basic conditions. Irradiating substrates bearing various aromatic rings, acid-sensitive groups, cyclohexenyl, cycloheptenyl, and unsaturated pyran with UV-light (254 nm) smoothly yielded hexahydrofluorenones and related structures. This photo-Nazarov reaction could also be applicable to the substrates carrying β-alkyl groups on the enone, which gave corresponding polycyclic rings containing quaternary centers. These photo-electrocyclized products may prove useful for synthesizing a variety of natural products and their derivatives. Further application of this mild photo-Nazarov reaction in the synthesis of taiwaniaquinol B was achieved.
Gold-catalyzed reactions of enynals/enynones with norbornenes: Generation and trapping of cyclic o-quinodimethanes (o-QDMs)
Zhu, Shifa,Zhang, Zhicai,Huang, Xiaobing,Jiang, Huanfeng,Guo, Zhengjiang
supporting information, p. 4695 - 4700 (2013/05/09)
Fan-like structures: An efficient AuIII-catalyzed method to generate the highly reactive cyclic o-quinodimethane (o-QDM) species from easily available enynals or enynones is presented (see scheme). This method produced a variety of structurally unique fan-like products with the advantages of mild reaction conditions, excellent diastereoselectivities, and high functional-group tolerance. Copyright
