Synthesis of Unsaturated Macrocycles by Ru-Catalyzed Ring-Closing Metathesis: A Comparative Study
作者:Fabia Grisi、Chiara Costabile、Anna Grimaldi、Colomba Viscardi、Carmela Saturnino、Pasquale Longo
DOI:10.1002/ejoc.201200960
日期:2012.10
activity and stereoselectivity of phosphane- and N-heterocyclic carbene (NHC)-containing ruthenium benzylidene complexes have been evaluated in macrocyclic ring-closing olefin metathesis to produce unsaturated lactones and lactams. The success of the macrocyclization depends on the nature of the ligand (phosphane or N-heterocyclic carbene) on the ruthenium center and on the NHC properties. As for stereoselectivity
已在大环闭环烯烃复分解反应中评估了含磷烷和 N-杂环卡宾 (NHC) 的亚苄基钌配合物的活性和立体选择性,以生产不饱和内酯和内酰胺。大环化的成功取决于钌中心上的配体(磷烷或 N-杂环卡宾)的性质和 NHC 特性。至于立体选择性,E/Z 比似乎不仅受钌催化剂的性质影响,而且受所得不饱和大环的热力学稳定性的影响,正如理论结果所证实的那样。