The Stereoselective Synthesis of 2-Aryl-2-hydroxybutanoic Acid via Menthyl Chiral Auxiliaries
作者:Ji-Ming Xiang、Bao-Lin Li
DOI:10.1002/hlca.201000024
日期:2010.10
In the presence of titanium(IV) tetraethoxide ((EtO)4Ti), menthyl arylglyoxylates are prepared by transesterification of ethyl arylglyoxylates and natural (−)‐(1R,2S,5R)‐menthol. Using menthyl as a chiral auxiliary, the corresponding novel (R)‐menthyl 2‐aryl‐2‐hydroxybutanoates are synthesized by the addition of Et2Zn with menthyl arylglyoxylates. The structures of the products are characterized by