摘要:
带有碱性和大体积叔膦配体RuCl 2 { C C(E)R} L 2 [L = PPr i3,E = H,R = Ph(3a),t -Bu(3b),二茂铁基(3c),p -MeO 2 CC 6 H 4(3d),p -MeOC 6 H 4(3e); L = PCy 3,E = H,R = Ph(4a),t -Bu(4b),二茂铁基(4c);L = PPr i3,E = SiMe 3,R = Ph(6),1,1'-二茂铁基(7)],已经开发出来。PPr i处理Ru(甲基烯丙基)2(cod)(1)3和HCl(每2当量)在-20°C时提供[RuCl 2(PPr i3)2 ] n,其在室温下立即与苯乙炔和叔丁基乙炔反应,分别得到61a和57%的分离产率分别为3a,b。另一方面,将[RuCl 2(对-cymene)] 2(2),膦(2当量/ Ru)和炔烃(1当量/ Ru)的甲苯溶液在80°C下加热可选择