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Stereoconvergent,Redox‐Neutral Access to Tetrahydroquinoxalines through Relay Epoxide Opening/Amination of Alcohols
Authors:Guangda Xu  Guoqiang Yang  Yue Wang  Pan‐Lin Shao  Jia Ning Nicolette Yau  Bing Liu  Yunbo Zhao  Ye Sun  Xinxin Xie  Shuo Wang  Yao Zhang  Lixin Xia  Yu Zhao
Abstract:We present an economical catalytic procedure to convert readily available 1,2‐diaminobenzenes and terminal epoxides into valuable 1,2,3,4‐tetrahydroquinoxalines in a highly enantioselective fashion. This procedure operates through relay zinc and iridium catalysis, and achieves redox‐neutral and stereoconvergent production of valuable chiral heterocycles from racemic starting materials with water as the only side product. The use of commercially available reagents and catalysts and a convenient procedure also make this catalytic method attractive for practical application.
Keywords:borrowing hydrogen catalysis  enantioselectivity  redox-neutral catalysis  relay catalysis  tetrahydroquinoxaline
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