Nucleophilic Catalysis with π-Bound Nitrogen Heterocycles: Synthesis of the First Ruthenium Catalysts and Comparison of the Reactivity and the Enantioselectivity of Ruthenium and Iron Complexes
作者:Christine E. Garrett、Gregory C. Fu
DOI:10.1021/ja981061o
日期:1998.8.1
catalysts. The relative efficiency of the ruthenium complexes as asymmetric catalysts is also evaluated: in the kinetic resolution of secondary alcohols, ruthenium is markedly less effective than iron, but in the deracemization/ring opening of azlactones, ruthenium is slightly more enantioselective. This study documents for the first time the impact of the metal on the reactivity and on the enantioselectivity
已经合成了三种带有 π 键合氮杂环的钌配合物。已确定这些配合物可作为一系列过程的有效亲核催化剂,包括醇与双烯酮的酰化、吖内酯的开环以及醇与烯酮的加成;它们的活性与相应的铁催化剂相当或略强。还评估了钌配合物作为不对称催化剂的相对效率:在仲醇的动力学拆分中,钌的效率明显低于铁,但在吖内酯的去消旋/开环中,钌的对映选择性略高。