89268-72-4Relevant academic research and scientific papers
Rh(I)/Bisoxazolinephosphine-Catalyzed Regio- And Enantioselective Allylic Substitutions
Ghorai, Samir,Huang, Wenyu,Li, Changkun,Xu, Wen-Bin
, p. 4491 - 4496 (2020/05/19)
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 be converted to the same chiral branched products with excellent regio- and enantioselectivities as well. Chiral π-allyl-Rh(III)/NPN intermediate was isolated and characterized to understand the origin of the high selectivities.
Iridium-catalyzed, regio- and enantioselective allylic substitution with aromatic and aliphatic sulfinates
Ueda, Mitsuhiro,Hartwig, John F.
supporting information; experimental part, p. 92 - 94 (2010/03/04)
"Chemical Equation Presented" 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 fo
ASYMMETRIC INDUCTION IN THE PALLADIUM-CATALYZED SULFONYLATION OF ALLYLIC SULFINATES AND ACETATES WITH CHIRAL PHOSPHINE LIGANDS
Hiroi, Kunio,Makino, Kunitaka
, p. 617 - 620 (2007/10/02)
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
Studies on Chiral Organo-Sulfur Compounds. II. Stereochemistry of Thermal Chiral Allyl Sulfinate-Sulfone Rearrangements
Hiroi, Kunio,Kitayama, Ryuichi,Sato, Shuko
, p. 2628 - 2638 (2007/10/02)
A highly efficient and general synthetic route to optically active sulfinates by the stereospecific boron trifluoride etherate-catalyzed esterification of sulfinamides was developed.Dramatic solvent effects were observed in the thermal transformation of allyl sulfinate derivatives to sulfones.Heating of chiral trans- and cis-allyl sulfinates, (S)-(-)-3a,c,e and (S)-(-)-3b,d,f, in N,N-dimethylformamide at 90-120 deg C provided chiral sulfones (S)-(+)- and (R)-(-)-5,6,7 in good yields, respectively, with exceedingly high stereospecificity. Keywords - asymmetric transfer; stereospecificity; chiral allyl sulfinate; chiral allyl sulfone; boron trifluoride etherate; thermolysis
Palladium-catalysed Allylic Sulphinate-Sulphone Rearrangements; Asymmetric Induction in the Palladium-catalysed Transfer of Chiral Sulphinates to Sulphones
Hiroi, Kunio,Kitayama, Ryuichi,Sato, Shuko
, p. 303 - 305 (2007/10/02)
The rearrangement of allylic sulphinates 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 catal
Dramatic Solvent Effects and Stereospecificity in Allylic Sulphinate-Sulphone Rearrangements
Hiroi, Kunio,Kitayama, Ryuichi,Sato, Shuko
, p. 1470 - 1472 (2007/10/02)
Dramatic solvent effects 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 deg C provided chiral sulphones (2a - d) in good yields with very high stereospecificity.
