Synthesis of Quinoline Derivatives via Cu-Catalyzed Cascade Annulation of Heterocumulenes, Alkynes, and Diaryliodonium Salts
作者:Yue Chi、Haihan Yan、Wen-Xiong Zhang、Zhenfeng Xi
DOI:10.1021/acs.orglett.7b01025
日期:2017.5.19
cascade [2 + 2 + 2] and [4 + 2] annulation reactions among heterocumulenes, alkynes, and diaryliodonium salts were achieved. Various quinoline derivatives could be obtained in good yields with excellent selectivity. This methodology provided a novel pathway to activate heterocumulenes via a unique highly reactive cationicintermediate. The reaction process was well elucidated by density functional theory
CuOTf-Catalyzed Selective Generation of 2-Aminopyrimidines from Carbodiimides and Diaryliodonium Salts by a Triple C(sp<sup>3</sup>)−H Functionalization
作者:Yue Chi、Haihan Yan、Wen-Xiong Zhang、Zhenfeng Xi
DOI:10.1002/chem.201604739
日期:2017.1.18
The selective C(sp3)−H bondfunctionalization is an ideal and atom‐economical method in organic synthesis. In this work, 2‐aminopyrimidines are generated from a Cu‐catalyzed reaction between carbodiimides and diaryliodonium salts, by cleavage of four C(sp3)−H, one C−N, and one C=N bonds in the carbodiimides. It is the first triple C(sp3)−H bondfunctionalization neighboring a C=N bond. The selective