Catalytic Enantioselective Sulfinyl Transfer Using Cinchona Alkaloid Catalysts
作者:Hillary M. Peltier、Jared W. Evans、Jonathan A. Ellman
DOI:10.1021/ol050275p
日期:2005.4.1
[reaction: see text] Practical reaction conditions for the catalyticenantioselective synthesis of sulfinate esters are reported. Commercially available cinchonaalkaloids were found to be superior catalysts for the sulfinyl transfer reaction of tert-butanesulfinyl chloride and a variety of benzyl alcohols. Sulfinyl transfer with 2,4,6-trichlorobenzyl alcohol and 10 mol % of the commercially available
Catalytic Enantioselective Synthesis of Sulfinate Esters through the Dynamic Resolution of <i>tert</i>-Butanesulfinyl Chloride
作者:Jared W. Evans、Matthew B. Fierman、Scott J. Miller、Jonathan A. Ellman
DOI:10.1021/ja047845l
日期:2004.7.1
new synthetic route to obtain enantiomerically enriched tert-butanesulfinate esters in excellent yields through catalytic enantioselective sulfinyl transfer is described. As little as 0.5 mol % of chiral amine catalysts was used to couple racemic tert-butanesulfinyl chloride with arylmethyl alcohols to provide sulfinateesters in near quantitative yields and with enantiomeric excesses up to 81%. The method