A New Strategy for the Synthesis of Chiral β-Alkynyl Esters via Sequential Palladium and Copper Catalysis
作者:Barry M. Trost、Benjamin R. Taft、James T. Masters、Jean-Philip Lumb
DOI:10.1021/ja203171x
日期:2011.6.8
new strategy for the synthesis of chiral β-alkynyl esters which relies on sequential Pd and Cu catalysis is reported. Terminalalkynes bearing aryl, alkyl, and silyl groups can be employed without prior activation yielding a wide range of important chiral building blocks. The reaction sequence utilizes a robust Pd(II)-catalyzed hydroalkynylation of ynoates with terminalalkynes providing geometrically