Rhodium-Catalyzed Asymmetric Allylic Substitution with Boronic Acid Nucleophiles
摘要:
An enantio-, regio-, and diastereoselective rhodium(I)-catalyzed desymmetrization of a meso-cyclic allylic dicarbonate with organoboronic acid nucleophiles is described. The rhodium(I) catalyst formed in situ from [Rh(cod)OH](2) and Xyl-P-PHOS allowed the S(N)2' allylic substitution product to be obtained with a range of arylboronic acids in enantiomeric excesses of up to 92% with regioselectivities of up to > 20:1.
Rhodium-Catalyzed Asymmetric Allylic Substitution with Boronic Acid Nucleophiles
作者:Frederic Menard、Timothy M. Chapman、Chris Dockendorff、Mark Lautens
DOI:10.1021/ol061777l
日期:2006.9.1
An enantio-, regio-, and diastereoselective rhodium(I)-catalyzed desymmetrization of a meso-cyclic allylic dicarbonate with organoboronic acid nucleophiles is described. The rhodium(I) catalyst formed in situ from [Rh(cod)OH](2) and Xyl-P-PHOS allowed the S(N)2' allylic substitution product to be obtained with a range of arylboronic acids in enantiomeric excesses of up to 92% with regioselectivities of up to > 20:1.