Efficient palladium-catalyzed C(sp<sup>2</sup>)–H activation towards the synthesis of fluorenes
作者:Juan Song、Yali Li、Wei Sun、Chenglong Yi、Hao Wu、Haotian Wang、Keran Ding、Kang Xiao、Chao Liu
DOI:10.1039/c6nj02033j
日期:——
protocol for the synthesis of fluorene derivatives has been developed through palladium-catalyzed cyclization of 2′-halo-diarylmethanes via activation of arylic C–H bonds. The reactions occurred smoothly and allowed both electron-rich and electron-deficient substrates to convert into their corresponding fluorenes in good to excellent yields. Studies revealed that this Pd-catalyzedcyclization was also available
Bismuth-catalyzed synthesis of anthracenes via cycloisomerization of o-alkynyldiarylmethane
作者:Jungmin Park、Hyuck Choi、Deug-Chan Lee、Kooyeon Lee
DOI:10.1016/j.tetlet.2015.10.111
日期:2015.12
In this study, anthracenes were efficiently synthesized from o-alkynyldiarylmethane using a novel method that exploits the synergistic effect between Bi(OTf)3 as the catalyst, and trifluoroacetic acid (TFA). Through this reaction, we achieved the rapid and efficient synthesis of anthracenes bearing various functional groups under mild conditions.