Solvent-Free Synthesis of α-Amino Ketones from α-Hydroxyl Ketones via A Novel Tandem Reaction Sequence Based on Heyns Rearrangement
作者:Qing-le Zeng、Guang-xun Li、Zhuo Tang、Ling-yu Li
DOI:10.1055/s-0037-1611731
日期:2019.4
pharmaceutically important α-amino ketonesfrom readily available α-hydroxy ketones and secondary amines through a tandem reaction sequence based on Heyns rearrangement. The reaction smoothly proceeded by using catalytic PTSA as catalyst without solvent. Primary and secondary α-hydroxy ketones were readily used and regioselectively afforded the correspondingly α-amino ketones with moderate yield.
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