(Thio)etherification of Quinoxalinones under Visible‐Light Photoredox Catalysis
作者:Jiadi Zhou、Peng Zhou、Tingting Zhao、Quanlei Ren、Jianjun Li
DOI:10.1002/adsc.201901008
日期:2019.12.3
An efficient visible‐light‐induced (thio)etherification of quinoxalin‐2(1H)‐ones with divergent aliphatic alcohols and thiols (primary, secondary, and tertiary) at room temperature in air has been developed. This protocol was highlighted by its mild conditions, readily available starting materials, operational simplicity, and wide functional group tolerance.
Various 3‐alkoxylated quinoxalin‐2(1H)‐ones were synthesized in a simple undivided cell via electrochemically dehydrogenative C–H/O–H cross‐coupling between quinoxalin‐2(1H)‐ones and alcohols under mild conditions.
Visible‐Light‐Induced Alkoxylation of Quinoxalin‐2(1
<i>H</i>
)‐ones with Alcohols for the Synthesis of Heteroaryl Ethers
作者:Lulu Zhao、Lei Wang、Yanhui Gao、Zhiming Wang、Pinhua Li
DOI:10.1002/adsc.201900732
日期:2019.12.3
A direct and simple strategy to heteroaryl ethers via a visible‐light‐induced alkoxylation of quinoxalin‐2(1H)‐ones with alcohols under ambient conditions was developed. The commercially available, low cost alcohols served as alkoxylation reagents and solvents. This reaction has advantages of novel protocol, mild conditions, good functional‐group tolerance, and high yields of products.
C(sp2)–H/O–H cross-dehydrogenative coupling of quinoxalin-2(1H)-ones with alcohols under visible-light photoredox catalysis
作者:Long-Yong Xie、Yi-Shu Liu、Hong-Ru Ding、Shao-Feng Gong、Jia-Xi Tan、Jun-Yi He、Zhong Cao、Wei-Min He
DOI:10.1016/s1872-2067(19)63526-6
日期:2020.8
Abstract An efficient and practical route to various 3-alkoxylquinoxalin-2(1H)-ones through visible-light photocatalytic C(sp2)−H/O−H cross-dehydrogenation coupling of quinoxalin-2(1H)-ones and alcohols, employing ambient air as an oxidant at roomtemperature under metal-free conditions, was developed.