Iridium-Catalyzed, Regio- and Enantioselective Allylic Substitution with Aromatic and Aliphatic Sulfinates
作者:Mitsuhiro Ueda、John F. Hartwig
DOI:10.1021/ol9023248
日期:2010.1.1
The iridium-catalyzed allylation of sodium sulfinate to form branched allylic sulfones is reported. The reactions between various sodium sulfinates and achiral allylic carbonates occur in good yields, with high selectivity for the branched isomer, and high enantioselectivities (up to 98% ee).
Rh(I)/Bisoxazolinephosphine-Catalyzed Regio- and Enantioselective Allylic Substitutions
作者:Wen-Bin Xu、Samir Ghorai、Wenyu Huang、Changkun Li
DOI:10.1021/acscatal.0c00712
日期:2020.4.17
Rhodium(I)/bisoxazolinephosphine combination has been developed as a general catalyst to achieve the dynamic kinetic asymmetric allylation of a variety of nitrogen, carbon, oxygen, and sulfur pronucleophiles from branched racemic allylic carbonates. Exclusive branch-selectivity and up to 99% enantiomeric excess could be obtained under neutral conditions. Linear allylic substrates (both Z and E) could
ASYMMETRIC INDUCTION IN THE PALLADIUM-CATALYZED SULFONYLATION OF ALLYLIC SULFINATES AND ACETATES WITH CHIRAL PHOSPHINE LIGANDS
作者:Kunio Hiroi、Kunitaka Makino
DOI:10.1246/cl.1986.617
日期:1986.4.5
Treatment of allylic (±)-p-toluenesulfinates with tetrakis(triphenylphosphine)palladium in the presence of chiral phosphine ligands underwent allylic sulfinate-sulfone rearrangements to give the corresponding optically active allylic sulfones in high optical yields. The palladium-catalyzed reactions of readily obtainable allylic acetates with sodium p-toluenesulfinate in the presence of chiral phosphine ligands provided a new entry to optically active allylic sulfones with high enantiomeric excess.
Dramatic solvent effects and stereospecificity in allylic sulphinate–sulphone rearrangements
作者:Kunio Hiroi、Ryuichi Kitayama、Shuko Sato
DOI:10.1039/c39830001470
日期:——
Dramaticsolventeffects were observed in the thermolysis of allyl sulphinates; heating of chiral trans- and cis-allyl sulphinates (S)-(–)-(1a–g) in N,N-dimethylformamide at 90–120 °C provided chiral sulphones (2a–d) in good yields with very high stereospecificity.
Palladium-catalysed allylic sulphinate–sulphone rearrangements; asymmetric induction in the palladium-catalysed transfer of chiral sulphinates to sulphones
作者:Kunio Hiroi、Ryuichi Kitayama、Shuko Sato
DOI:10.1039/c39840000303
日期:——
The rearrangement of allylicsulphinates to sulphones is facilitated by palladium catalysis, treatment of the chiral trans-and cis-allyl sulphinates (S)-(–)-(1a)-(1c), and -(1e), and(S)-(–)-(1b)and -(1d)with a catalytic amount of the palladium catalysts (3)and(5)providing the corresponding chiral allyl sulphones,(S)-(+)-and(R)-(–)-(2a–c), respectively, in good yields; exceptionally the palladium catalysis