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
The photosynthetic preparation of N‐aryl‐ and N‐alkyl‐bearing carbazoles utilizes continuousflow, visiblelight, and an in situ formed Cu‐based sensitizer (see picture). The method is mild and efficient, and allows the straightforward synthesis of a variety of carbazoles with different substituents, heterocycles, and complex carbon architectures.
Photochemical Synthesis of Complex Carbazoles: Evaluation of Electronic Effects in Both UV‐ and Visible‐Light Methods in Continuous Flow
作者:Augusto C. Hernandez‐Perez、Antoine Caron、Shawn K. Collins
DOI:10.1002/chem.201502661
日期:2015.11.9
An evaluation of both a visible‐light‐ and UV‐light‐mediated synthesis of carbazoles from various triarylamines with differing electronic properties under continuous‐flow conditions has been conducted. In general, triarylamines bearing electron‐rich groups tend to produce higher yields than triarylamines possessing electron‐withdrawing groups. The incorporation of nitrogen‐based heterocycles, as well
Site-Selective Rhodium(III)-Catalyzed C−H Amination of 7-Azaindoles with Anthranils: Synthesis and Anticancer Evaluation
作者:Mijin Jeon、Jihye Park、Prasanta Dey、Yongguk Oh、Hyunjung Oh、Sangil Han、Sung Hee Um、Hyung Sik Kim、Neeraj Kumar Mishra、In Su Kim
DOI:10.1002/adsc.201700800
日期:2017.10.25
The site-selective C−H amination reaction of 7-azaindoles with various benzisoxazoles as amination surrogates under cationic rhodium(III) catalysis is described. This transformation efficiently provides a range of ortho-aminated N-aryl-7-azaindoles with excellent site-selectivity and functional group compatibility. The formed ortho-aminated 7-azaindoles were readily transformed into biologically relevant