Transition-Metal-Free Sonogashira-Type Cross-Coupling of Alkynes with Fluoroarenes
作者:Guanyi Jin、Xuxue Zhang、Song Cao
DOI:10.1021/ol401317m
日期:2013.6.21
A novel, inexpensive, and efficient palladium-, copper-, ligand-, and amine-free Sonogashira-type cross-coupling reaction of terminal alkynes with unreactive aryl fluorides in the presence of sodium, sodium methoxide, and calcium hydroxide under the assistance of a Grignard reagent was developed. A plausible mechanism was also suggested.
Ru(<scp>ii</scp>)-Catalyzed C–H activation and annulation of salicylaldehydes with monosubstituted and disubstituted alkynes
The Ru(II)-catalyzed C-H activation and annulation reaction of salicylaldehydes and disubstitutedalkynes affords chromones in high yields. This reaction works with terminal alkynes also and tolerates wide range of sensitive...
LiHMDS-Promoted Palladium-Catalyzed Sonogashira Cross-Coupling of Aryl Fluorides with Terminal Alkynes
作者:Jingjing He、Kang Yang、Jianhong Zhao、Song Cao
DOI:10.1021/acs.orglett.9b03815
日期:2019.12.6
A highly efficient Pd-catalyzed Sonogashira coupling of various aryl fluorides with terminalalkynes in the presence of LiHMDS was developed. Both unreactive electron-rich fluoroarenes and electron-poor fluoroarenes proceeded smoothly and afforded the corresponding internalalkynes in moderate to excellent yields.