Ligand-Free RuCl<sub>3</sub>-Catalyzed Alkylation of Methylazaarenes with Alcohols
作者:Tong-Yu Feng、Hong-Xi Li、David James Young、Jian-Ping Lang
DOI:10.1021/acs.joc.6b03095
日期:2017.4.21
RuCl3 efficiently catalyzes the alkylation of methylquinolines, methylpyridines, 2-methyl-benzooxazoles, and 2-methyl-quinoxalines with alkyl- or aryl-alcohols as alkylating agents. This synthetically useful and atom economical transformation does not require additional ligands. The mechanistic study indicated the alkylation reaction underwent a stepwise transfer hydrogenation, aldol condensation,
Iridium-Catalyzed Alkylation of Methylquinolines with Alcohols
作者:Yasushi Obora、Shinji Ogawa、Nobuyuki Yamamoto
DOI:10.1021/jo3019347
日期:2012.10.19
Iridium-catalyzed alkylation of methylquinolines at the methyl substituent was achieved using alcohols as alkylating agents. The reaction proceeded through a transfer hydrogenation pathway from the alcohol to the Ir complex, affording an aldehyde and Ir-H species, followed by base assisted aldol condensation and hydrogenation. This method provides an atom-economical and convenient route to alkylquinolines from easily accessible methylquinolines.