Synthesis of substituted quinolines by the electrophilic cyclization of n-(2-alkynyl)anilines
作者:Xiaoxia Zhang、Tuanli Yao、Marino A. Campo、Richard C. Larock
DOI:10.1016/j.tet.2009.12.012
日期:2010.2
A wide variety of substituted quinolines are readily synthesized under mild reaction conditions by the 6-endo-dig electrophilic cyclization of N-(2-alkynyl)anilines by ICl, I2, Br2, PhSeBr, and p-O2NC6H4SCl. The reaction affords 3-halogen-, selenium- and sulfur-containing quinolines in moderate to good yields in the presence of various functional groups. Analogous quinolines bearing a hydrogen in the
An unprecedented Zn-promoted selective cleavage of vinyl azides for the synthesis of 4-substituted quinolines is developed. In this conversion, vinyl azides function as a dual synthon via C═C and C–N bond cleavage with two C═C bonds and one C═N bond formation in a one-step manner. The reaction is appreciated for its readily accessible substrates, high step economy, mild conditions, and use of air as
Direct Synthesis of Quinolines via Co(III)-Catalyzed and DMSO-Involved C–H Activation/Cyclization of Anilines with Alkynes
作者:Xuefeng Xu、Yurong Yang、Xu Zhang、Wei Yi
DOI:10.1021/acs.orglett.7b03673
日期:2018.2.2
activation/cyclization of simple, cheap, and easily available anilines with alkynes for direct and highly efficient synthesis of privileged quinolines with exclusive regioselectivity and broad substrate/functional group tolerance and in good to excellent yields, where DMSO was employed as both the solvent and the C1 building block of quinoline products, is reported. Mechanistic experiments revealed that
The one-pot synthesis of quinolines via Co(<scp>iii</scp>)-catalyzed C–H activation/carbonylation/cyclization of anilines
作者:Xuefeng Xu、Yurong Yang、Xin Chen、Xu Zhang、Wei Yi
DOI:10.1039/c7ob02310c
日期:——
We herein disclose a novel Co(III)-catalyzed C–H activation/carbonylation/cyclization of anilines with ketones using paraformaldehyde as the carbonyl source, giving direct access to diverse quinolines with broad functional group tolerance and in good to excellent yields. Moreover, exclusive site-/region-selectivity was observed in this versatile transformation.
Carbon annulation of ortho-vinylanilines with dimethyl sulfoxide to access 4-aryl quinolines
作者:Jin Yuan、Jin-Tao Yu、Yan Jiang、Jiang Cheng
DOI:10.1039/c6ob02714h
日期:——
A palladium-catalyzed annulation of ortho-vinylanilines with dimethylsulfoxide was developed to access 4-aryl quinolines in moderate to good yields. Activated by 1,4-diazabicyclo[2.2.2]octane bis(sulfur dioxide) adduct (DABSO), DMSO served as a “CH–” fragment in this transformation. It represents a facile pathway leading to 4-aryl quinolines.