申请人:Trustees of Boston College, The
公开号:US20160168181A1
公开(公告)日:2016-06-16
Highly active, recoverable and recyclable transition metal-based metathesis catalysts and their organometallic complexes including dendrimeric complexes are disclosed, including a Ru complex bearing a 1,3-dimesityl-4,5-dihydroimidazol-2-ylidene and styrenyl ether ligand. The heterocyclic ligand significantly enhances the catalytic activity, and the styrenyl ether allows for the easy recovery of the Ru complex. Derivatized catalysts capable of being immobilized on substrate surfaces are also disclosed. The present catalysts can be used to catalyze ring-closing metathesis (RCM), ring-opening (ROM) and cross metatheses (CM) reactions, and promote the efficient formation of various trisubstituted olefins at ambient temperature in high yield.
高度活性、可回收和可循环使用的过渡金属基催化剂及其有机金属络合物,包括树枝状络合物被披露,包括一种带有1,3-二甲基-4,5-二氢咪唑-2-亚基和苯乙烯基醚配体的钌络合物。杂环配体显著提高了催化活性,而苯乙烯基醚使得钌络合物易于回收。还披露了能够固定在底物表面的衍生催化剂。所述催化剂可用于催化环闭合烯烃复分解反应(RCM)、环开环反应(ROM)和交叉复分解反应(CM),并在室温下高效地促进各种三取代烯烃的高产形成。