We report an efficient synthesis of 1,3-dienes from readily available enol triflates and vinyltributyltin using Pd2(dba)3 and triphenylarsine. Our approach allows for the preparation of these systems at room temperature and thus prevents isomerization to other isomeric dienes. The mild reaction conditions are attributed to the rate acceleration of the cross-coupling reaction due to the weak Ï-donation of the triphenylarsine ligand on the palladium catalyst.
我们报道了一种从易于获得的烯醇三
氟磺酸酯和
乙烯三
丁基锡通过Pd2(dba)3和三苯基胂高效合成1,3-二烯的方法。我们的方法允许在室温下制备这些体系,从而防止异构化为其他异构的二烯。温和的反应条件归因于由于三苯基胂
配体在
钯催化剂上的弱Ï-供电子作用而加速的交叉耦合反应。