Synthesis of α-heterosubstituted ketones through sulfur mediated difunctionalization of internal alkynes
作者:Zhong Zhang、Yuzheng Luo、Hongguang Du、Jiaxi Xu、Pingfan Li
DOI:10.1039/c9sc00568d
日期:——
Synthesis of α-heterosubstituted ketones was achieved through sulfur mediated difunctionalization of internal alkynes in one pot. The reaction design involves: phenyl substituted internal alkyne attacking triflic anhydride activated diphenyl sulfoxide to give a sulfonium vinyl triflate intermediate, hydrolysis to give an α-sulfonium ketone, and then substitution with various nucleophiles. This method
Chiral Phosphoric Acid Catalyzed Enantioselective Synthesis of α-Tertiary Amino Ketones from Sulfonium Ylides
作者:Wengang Guo、Yuzheng Luo、Herman H.-Y. Sung、Ian D. Williams、Pingfan Li、Jianwei Sun
DOI:10.1021/jacs.0c07210
日期:2020.8.19
approach for the synthesis of chiral α-amino ketones, which is particularly useful for the less accessible acyclic α-tertiary cases. By a protonation-amination sequence, our approach represents a rare asymmetric H-heteroatom bond insertion by α-carbonyl sulfonium ylides, an attractive surrogate of diazocarbonyls. The mild intermolecular C-N bond formation was catalyzed by chiral phosphoric acids with excellent