Synthesis of Polysubstituted Imidazoles and Pyridines<i>via</i>Samarium(III) Triflate-Catalyzed [2+2+1] and [4+2] Annulations of Unactivated Aromatic Alkenes with Azides
作者:Yingchun Wang、Jiuling Li、Yan He、Yuyang Xie、Hengshan Wang、Yingming Pan
DOI:10.1002/adsc.201500584
日期:2015.10.12
Samarium(III) triflate-catalyzed [2+2+1] and [4+2] annulations have been identified for the preparation of fully substituted imidazoles and 2,3,5-trisubstituted pyridines from the readily available unactivatedaromaticalkenes and azidomethyl aromatics. These reactions proceeded smoothly with one- or two-nitrogen synthons to afford a range of two types of skeletally distinct N-heterocycles in good
A metal-free decarboxylative cyclization from natural α-amino acids to construct pyridine derivatives
作者:Qiang Wang、Changfeng Wan、Yang Gu、Jintang Zhang、Lingfeng Gao、Zhiyong Wang
DOI:10.1039/c0gc00753f
日期:——
A metal-free decarboxylative cyclization from natural α-amino acids was developed and applied in the preparation of pyridinederivatives. By virtue of this method, a series of pyridines containing the moiety of natural α-amino acids can be synthesized efficiently from the corresponding natural α-amino acids.