A bis-sulfoxide with a binaphthyl backbone is introduced as a readily available, chiral ligand entity in late-transition metal catalysis. Ligand p-tol-BINASO [where p-tol-BINASO is 1,1‘-binaphthalene-2,2‘-diyl-bis-(p-tolylsulfoxide)] is obtained in pure form in one single synthetic step from relatively cheap, commercially available starting materials. Precatalyst [(P,R,R)-p-tol-BINASO}RhCl]2 was synthesized
具有联
萘骨架的双亚砜作为后过渡
金属催化中容易获得的手性
配体实体被引入。
配体 p-tol-BINASO [其中 p-tol-BINASO 是
1,1'-联萘-2,2'-二基-双-(
对甲苯基亚砜)] 在一个单一合成步骤中以纯形式从相对便宜的、市售原料。前催化剂 [(P,R,R)-p-tol-BINASO}RhCl]2 以高产率合成,并通过 X 射线衍射进行结构表征,并将结构数据与游离
配体进行比较。该预催化剂在芳基
硼酸与环状 α,β-不饱和酮和酯的不对称 1,4-加成反应中显示出优异的反应性和选择性。