Catalytic Asymmetric Synthesis of Chiral Allylic Esters
作者:Jeffrey S. Cannon、Stefan F. Kirsch、Larry E. Overman
DOI:10.1021/ja106685w
日期:2010.11.3
A broadly useful catalytic enantioselective synthesis of branched allylicesters from prochiral (Z)-2-alkene-1-ols has been developed. The starting allylicalcohol is converted to its trichloroacetimidate intermediate by reaction with trichloroacetonitrile, either in situ or in a separate step, and this intermediate undergoes clean enantioselective S(N)2' substitution with a variety of carboxylic acids
We report on the first intermolecular asymmetric catalytic regio- and enantioselective addition of carboxylic acids to terminalallenes to form valuable branchedallylic esters, employing a rhodium(I)/(R,R)-DIOP catalyst system.