The use of a bifunctional non-cross-linked polystyrene bearing both phosphme and phenol groups tor the organocatalytic isomerization of alkynes bearing electron-withdrawing ester substituents to afford the corresponding (E,E)-dienes in excellent yield and stereoselectivity is described. When polystyrene functionalized with only phosphine groups was used as the catalyst, either low or no yield of the
描述了使用带有膦基和
苯酚基团的双官能非交联聚
苯乙烯对带有吸电子酯取代基的
炔烃进行有机催化异构化,以优异的产率和立体选择性提供相应的 (E,E)-二烯。当仅用膦基团官能化的聚
苯乙烯用作催化剂时,所需产物的收率低或没有收率。因此,双功能聚
苯乙烯催化剂的两个官能团对于有效催化的发生都是必不可少的。这种双功能聚合物催化剂还用于从相应的
炔烃合成 (E,E,E)-
三烯和 (E,E)-二烯取代的 2(H)-
吡喃-2-酮。