Ruthenium-Catalyzed Direct and Selective C–H Cyanation of <i>N</i>-(Hetero)aryl-7-azaindoles
作者:Aniket Mishra、Tripta Kumari Vats、Indubhusan Deb
DOI:10.1021/acs.joc.6b01148
日期:2016.8.5
An efficient, highly regioselective, and scalable ruthenium-catalyzed o-aryl C–H mono-cyanation of N-aryl-7-azaindoles to form N-(2-cyanoaryl)-7-azaindoles has been developed through N-directed ortho C–H activation using N-cyano-N-phenyl-p-toluenesulfonamide as cyanating reagent in the presence of AgOTf and NaOAc in DCE. A range of substrates has furnished cyanated azaindoles in good to excellent yields
Synthesis of 1-Aryl-1H-pyrrolo[2,3-b]pyridines (1-Aryl-7-azaindoles) by a Thermal Dehydration-Cyclization-Dehydrogenation Sequence of 2-Arylamino-3-(1-hydroxyalkyl)pyridines
1-Aryl-1H-pyrrolo[2,3-b]pyridines (1-aryl-7-azaindoles) have been prepared in reasonable yields from the corresponding 2-arylamino-3-(1-hydroxyalkyl)pyridines, on heating at ca. 250 degrees C, through a successive dehydration/cyclization/dehydrogenation sequence.