Rhodium-Catalyzed Dehydrogenative Annulation of <i>N</i>-Arylmethanimines with Vinylene Carbonate for Synthesizing Quinolines
作者:Yan Hu、Jiang Nan、Jiacheng Yin、Guanjie Huang、Xin Ren、Yangmin Ma
DOI:10.1021/acs.orglett.1c03231
日期:2021.11.5
Here we report a novel Rh-catalyzed C−H/C−H alkenylation of N-arylmethanimines with vinylenecarbonate acting as a vinylene unit. Forty examples of C3,C4-nonsubstituted quinolines were achieved from commercially available starting materials. This identified process features an exceedingly simple system, a lower loading of catalyst, and the capacity for postfunctionalization with bioactive molecules
An efficient and practical palladium-catalyzed aerobic oxidative approach to afford functionalized 2-substituted quinolines in moderate to good yields from readily available allylbenzenes with aniline is developed. The present annulation process has high functional-group tolerance and high atom economy, making it a valuable and practical method in synthetic and medicinal chemistry. Moreover, this transformation
A Cu‐catalyzed C−H cyclization of simple anilines with ketones and DMSO as a one‐carbon source has been developed. Using an aerobicoxidative protocol, a number of ketones and anilines could be easily converted to 2‐arylquinolines, rather than 4‐arylquinolines, thus providing a highly atom‐economical and simple approach to biologically significant 2‐arylquinolines. Based on the preliminary experiments
2-Substituted quinolines and related derivatives can be rapidly prepared from (hetero)aryl halides and propargyl alcohols in the sense of a one-pot microwave-assisted coupling-isomerizationreaction (MACIR). First biological tests against trypanosomes and protozoans have revealed antiparasitic activity in the lower micromolar range.
Mild and efficient copper-catalyzed oxidative cyclization of oximes with 2-aminobenzyl alcohols at room temperature: synthesis of polysubstituted quinolines
作者:Yan-Yun Liu、Yang Wei、Zhi-Hui Huang、Yilin Liu
DOI:10.1039/d0ob02348e
日期:——
A simple and efficient ligand-free Cu-catalyzed protocol for the synthesis of polysubstituted quinolines via oxidative cyclization of oxime acetates with 2-aminobenzyl alcohols at room temperature has been developed. The presented approach provides a new synthetic pathway leading to polysubstituted quinolines with good functional group tolerance under mild conditions. Moreover, this transformation