Enantioselective Synthesis of Chromanones through Organocatalytic Tandem Reactions
作者:Mengxue Lu、Xin Wang、Zongli Xiong、Jingxiang Duan、Wen Ren、Weijun Yao、Yi Xia、Zhen Wang
DOI:10.1002/adsc.202001031
日期:2020.12.8
An enantioselective approach to lactone‐fused chromanone derivatives from 1‐(2‐hydroxyaryl)‐1,3‐diketones and α,β‐unsaturated aldehydes under mild conditions has been developed, which included organocatalytic stepwise Michaeladdition/ cycloketalization/hemiacetalization and followed by oxidation reaction. In the presence of chiral amine organocatalyst and an additional salicylic acid, a wide range
作者:Xiaoyi Li、Zihao Li、Rong Zhang、Zhen Zhou、Yonghui Zhang、Yi Xia、Weijun Yao、Zhen Wang
DOI:10.1021/acs.orglett.3c00705
日期:2023.4.21
organocatalyzed stereoselective domino reaction as a facile approach to multicyclic spirooxindolederivatives bearing two stereogenic quaternary carbon atoms is reported. The alkyl-substituted chiral thiourea catalyst was efficient for the reaction to tolerate a wide range of substrates, furnishing a new class of spirooxindolederivatives bearing an O,O-acetal-fused tricyclic skeleton or tetrahydroxanthone moiety