Lewis Acid Catalyzed Direct Cyanation of Indoles and Pyrroles with <i>N</i>-Cyano-<i>N</i>-phenyl-<i>p</i>-toluenesulfonamide (NCTS)
作者:Yang Yang、Yan Zhang、Jianbo Wang
DOI:10.1021/ol202335p
日期:2011.10.21
BF3·OEt2-catalyzed direct cyanation of indoles and pyrroles using a less toxic, bench-stable, and easily handled electrophilic cyanating agent N-cyano-N-phenyl-para-toluenesulfonamide (NCTS) affords 3-cyanoindoles and 2-cyanopyrroles in good yields with excellent regioselectivity. The substrate scope is broad with respect to indoles and pyrroles.
Silver-catalyzed chemoselective annulation of propargyl amines with alkynes for access to pyridines and pyrroles
作者:Tauqir A. Nizami、Ruimao Hua
DOI:10.1016/j.tet.2017.09.002
日期:2017.10
The annulation of propargyl amines with electron-deficient alkynes in the presence of silver salts affording pyridines and pyrroles has been developed. The chemoselective [4+2] or [3+2] annulation approach to pyridines or pyrroles depends on the structures of propargyl amines and the different reaction conditions.
Eine neue Pyrrolring-Synthese. II. Teil. Untersuchungen in der Pyrrolreihe. 7. Mitteilung
作者:C. A. Grob、H. P. Schad
DOI:10.1002/hlca.19550380506
日期:——
The previously described reaction sequence leading to substituted pyrroles has been studied using ethyl β-benzylaminocrotonate and 1-nitropropene as starting materials.