Ring‐Closing Olefin Metathesis Catalyzed by Well‐Defined Vanadium Alkylidene Complexes
作者:Dmitry S. Belov、Gabriela Tejeda、Charlene Tsay、Konstantin V. Bukhryakov
DOI:10.1002/chem.202005438
日期:2021.3.8
selectivity in ring‐opening metathesis polymerization of strained cyclic olefins comparable to those of Ru, Mo, and W catalysts. However, the application of V alkylidenes in routine organic synthesis is limited. Here, we present the first example of ring‐closing olefin metathesis catalyzed by well‐defined V chloride alkylidene phosphine complexes. The developed catalysts exhibit tolerance to various functional
钒基催化剂在应变环烯烃的开环易位聚合中显示出与Ru,Mo和W催化剂相当的活性和选择性。但是,在常规的有机合成中V亚烷基的应用受到限制。在这里,我们给出了由明确定义的V氯化物亚烷基膦配合物催化的开环烯烃复分解的第一个例子。所开发的催化剂表现出对各种官能团的耐受性,所述官能团例如醚,酯,叔酰胺,叔胺和磺酰胺。亚胺基和膦的大小和给电子性质在活性中间体的稳定性中起着至关重要的作用。