Chiral-at-metal half-sandwich diamide complexes catalyse enantioselective cyclohydroamination of aminoalkenes at unexpectedly high rates given their high coordination number and steric bulk; substantial evidence is presented which argues against the established σ-bond insertion process and is strongly indicative of an imido [2+2] cycloaddition mechanism.
手性
金属半夹心双酰胺配合物催化
氨基烯烃的对映选择性环氢
氨化反应,反应速率意外地高,考虑到它们的高配位数和空间体积;提供了大量证据,反驳了已建立的σ键插入过程,强烈表明存在亚
氨基[2+2]环加成机制。