One-Pot Synthesis of Polysubstituted Spirofluorene–Indene via Ru(II)-Catalyzed [3 + 2] Annulation and Intramolecular Friedel–Crafts Cyclization
作者:Yu-Qin Zhu、Lin Dong
DOI:10.1021/acs.joc.5b01517
日期:2015.10.16
Ru(II)-catalyzed one-pot synthesis of polysubstituted spirofluorene–indenes via [3 + 2] annulation and then intramolecularFriedel–Crafts alkylation has been achieved. The simple method provides a broad scope of aryl ketones and internal alkynes, achieving PAHs skeletons in moderate to good yields.
Metal-Free Nitrogenation of 2-Acetylbiphenyls: Expeditious Synthesis of Phenanthridines
作者:Conghui Tang、Yizhi Yuan、Ning Jiao
DOI:10.1021/acs.orglett.5b00797
日期:2015.5.1
An intermolecular nitrogenation reaction toward the synthesis of phenanthridines has been developed. This metal-free protocol provides a novel nitrogen-incorporation transformation using azides as the nitrogen source. Phenanthridines, which are of great interest in pharmaceutical and medicinal chemistry, are synthesized efficiently in one step. Moreover, the byproducts derived from the Schmidt reaction are inhibited, which further demonstrated the high chemoselectivity of this transformation.