A functionalized trialkylphosphine ligand (1a) containing a pyridyl group has effected the Ni(0)-catalysed cycloaddition of terminally unsubstituted diynes with CO2 to give bicyclic 2-pyrones, for which ordinary trialkylphosphine ligands are not effective.
含有
吡啶基的官能化三烷基
膦配体(1a)已经实现了Ni(0)催化末端未取代的二炔与CO 2的环加成反应,从而生成双环2-
吡喃酮,而普通的三烷基
膦配体对此无效。