Controlling the Catalytic Oligomerization of Terminal Alkynes Promoted by Organoactinides: A Strategy to Short Oligomers
作者:Ariel Haskel、Ji Quan Wang、Thomas Straub、Tal Gueta Neyroud、Moris S. Eisen
DOI:10.1021/ja983640z
日期:1999.4.1
presence of terminal alkynes. However, the addition of specific amines ensures the selective synthesis of short oligomers. Catalytic “tailoring” to dimers or a mixture of dimers and trimers can be achieved by using nonbulky or bulky amines, respectively. The kinetics in the catalytic oligomerization of 1-hexyne, in the presence of i-BuNH2, mediated by Cp*2ThMe2 are first order in [alkyne], first order in
已经开发了一种用于催化合成末端炔烃的短寡聚体、二聚体和/或三聚体的新策略。该方法允许控制由双(五甲基环戊二烯基)锕系二甲基配合物(Cp*2AnMe2;Cp*=C5Me5,An=Th,U)促进的末端炔的催化低聚反应的程度,在某些情况下还可以控制其区域特异性。已知这些茂金属前体在末端炔烃的存在下促进同时产生大量不同尺寸的低聚物。然而,特定胺的添加确保了短寡聚物的选择性合成。通过分别使用非大体积或大体积胺,可以催化“定制”二聚体或二聚体和三聚体的混合物。在 i-BuNH2 存在下,1-己炔催化低聚反应的动力学,由 Cp*2ThMe2 介导的 [炔] 中的一级、[Th] 中的一级和 [胺] 中的反向一级。动力学、光谱和机械数据表明,t ...