An efficient Ru-catalyzed regioselective allylictrifluoromethylthiolation reaction of allylic carbonates was developed. The linear allylictrifluoromethylthioethers were obtained in 52–91% yields. Mechanistic investigation revealed that this reaction proceeds via a double allylictrifluoromethylthiolation sequence.
Iridium‐Catalyzed Asymmetric Allylic Substitution of Methyl Azaarenes
作者:Xi‐Jia Liu、Wen‐Yun Zhang、Chao Zheng、Shu‐Li You
DOI:10.1002/anie.202200164
日期:2022.5.9
An iridium-catalyzedasymmetricallylic substitution of a variety of methyl azaarenes, including (benzo)thiazole, oxazole, benzoimidazole, pyridine, and (iso)quinoline, is described. The corresponding chiral azaarene derivatives are afforded in good yields with high enantioselectivity (up to 96 % yield and 99 % ee).
well-defined tridentate chiral sulfoxide-N-olefin ligand has been designed and applied in rhodium-catalyzed asymmetric allylicsubstitutions of racemic allyliccarbonates, providing the branched allylic products in good yields with good to high enantioselectivities and excellent regioselectivities. This reaction mechanism, which involves the possible hemilability of olefin coordination on sulfoxide-N-olefin
A direct route to branched N-allylpyrimidine analogues is herein reported via the highly regio- and enantioselective asymmetricallylation of pyrimidines with racemic allylic carbonates. With [Rh(COD)Cl]2/chiral diphosphine as the catalyst, a range of chiral pyrimidine acyclic nucleosides could be obtained under neutral conditions in good yields (up to 95% yield) with high levels of regio- and enantioselectivities