Catalytic Asymmetric Synthesis with Rh−Diene Complexes: 1,4-Addition of Arylboronic Acids to Unsaturated Esters
作者:Jean-François Paquin、Corey R. J. Stephenson、Christian Defieber、Erick M. Carreira
DOI:10.1021/ol051533l
日期:2005.8.1
route to enantioenriched tert-butyl 3,3-diarylpropanoates is presented. These useful building blocks are prepared via an asymmetricrhodium-catalyzedconjugateaddition of arylboronic acids to unsaturated tert-butyl esters in the presence of chiral dienes as ligands. The addition of both electron-poor and electron-rich boronic acids proceeds smoothly with various enoates in 63-90% yield with high enantioselectivites