128444-85-9Relevant academic research and scientific papers
Further Structural Modification of Sulfur-Stabilized Silicon Cations with Binaphthyl Backbones
Shaykhutdinova, Polina,Oestreich, Martin
, p. 2221 - 2229 (2019/05/08)
The synthesis and spectroscopic characterization of two novel cationic silicon-sulfur Lewis pairs with a chiral 4,4′-disubstituted binaphthyl silepine backbone are described. Both Lewis acids induce significant enantioselectivity in the model Diels-Alder reaction of cyclohexa-1,3-diene and chalcone but additional substitution of the binaphthyl backbone exerts a minimal effect on enantioinduction compared to previously reported Lewis acids. Another silicon cation with a chiral spirocyclic backbone induces enantioselectivity in the same range but its synthesis is laborious.
