Direct synthesis of 8-acylated quinoline N-oxides<i>via</i>palladium-catalyzed selective C–H activation and C(sp<sup>2</sup>)–C(sp<sup>2</sup>) cleavage
作者:Guang-Hui Li、Dao-Qing Dong、Xian-Yong Yu、Zu-Li Wang
DOI:10.1039/c8nj05374j
日期:——
An efficient method for the synthesis of 8-acylated quinoline N-oxides from the reaction of quinoline N-oxides with α-diketones via C–C bond cleavage was developed. A variety of quinoline N-oxides and α-diketones with different groups was well tolerated in this system.
“One-Pot” Approach to 8-Acylated 2-Quinolinones via Palladium-Catalyzed Regioselective Acylation of Quinoline <i>N</i>-Oxides
作者:Xiaopei Chen、Xiuling Cui、Yangjie Wu
DOI:10.1021/acs.orglett.6b00923
日期:2016.5.20
A "one-pot" facile and efficient protocol for 8-acylated 2-quinolinones has been developed through palladium-catalyzed acylation of quinoline N-oxides, which proceeds with high selectivity at the C8-position. The desired products were isolated in up to 95% yield and good functional group tolerance. A palladacycle was isolated from the catalytic process and proposed as a key intermediate.