Ligand Effects on the Pd-Catalyzed Cross-Coupling Reaction of 3-Iodoalk-2-enoates with Propargyl/1,2-Allenylic Metallic Species: An Efficient Regiodivergent Synthesis of 2,4,5-Trienoates
作者:Jinbo Zhao、Yihua Yu、Shengming Ma
DOI:10.1002/chem.200901287
日期:2010.1.4
makes a big difference: The 1,3‐lithiumshift of propargyl/1,2‐allenyl lithium has been tuned and applied in a subsequenttransmetalation and Pd‐catalyzed Negishi couplingreaction with 3‐iodoalk‐2‐enoates to give a highly regioselective and regiodivergent synthesis of 2,4,5‐trienoates. It was discovered that ligands play a very important role in the cross‐couplingreactions with respect to both regioselectivity