Rhodium Catalyzed C2-Selective Cyanation of Indoles and Pyrroles
作者:Manthena Chaitanya、Pazhamalai Anbarasan
DOI:10.1021/acs.joc.5b00142
日期:2015.4.3
An efficient and general rhodium(III) catalyzed C2-selective cyanation of indoles and pyrroles was accomplished employing easily accessible and environmentally friendly cyanating reagent, NCTS. This methodology tolerates various functional groups, uses readily removable directing groups and allows the synthesis of various 2-cyanoindoles and pyrroles in good to excellent yield.
Synergistic Heterobimetallic Manifold for Expedient Manganese(I)-Catalyzed C−H Cyanation
作者:Weiping Liu、Sven C. Richter、Ruhuai Mei、Milica Feldt、Lutz Ackermann
DOI:10.1002/chem.201604621
日期:2016.12.12
The manganese‐catalyzed cyanation of inert C−H bonds was achieved within a heterobimetallic catalysis regime. The manganese(I) catalysis proved widely applicable and enabled C−H cyanations on indoles, pyrroles and thiophenes by facile C−Hmanganesation. The robustness of the manganese catalyst set the stage for the racemization‐free C−H cyanation of amino acids with excellent levels of positional and
A mild strategy for Co(III)-catalyzed C(sp2)–H cyanation of indoles was developed by using NCBLD as an electrophilic cyanation reagent and 1-butyl-3-acetylimidazole ditrifluoromethylsulfonimide ([BAIM]NTf2) as an environmentally friendly and recyclable solvent, and a series of 2-cyano products were obtained at room temperature. Adopting this strategy, the unnatural nucleotide fragment precursor of