Tethered Bis(amidate) and Bis(ureate) Supported Zirconium Precatalysts for the Intramolecular Hydroamination of Aminoalkenes
作者:Jean Michel P. Lauzon、Laurel L. Schafer
DOI:10.1002/zaac.201400201
日期:2015.1
chalcogen donor and the zirconium atom is found for any of the transition metal species. All complexes were screened as precatalysts for the intramolecular hydroamination reaction with both primary and secondary aminoalkene substrates. Interestingly, the bis(ureate) species show similar reactivity to the bis(amidate) species, in contrast to a recently reported alkyl-bridged bis(ureate) complex, which readily
合成了主链中具有中性硫属元素供体(O 或 S)的束缚双(酰胺)和双(脲)前配体,并通过质子分解安装在锆上。双(酰胺)锆配合物采用κ4(N,N,O,O)结合基序,并在具有吡啶供体的固态下进行表征。同样,双(脲)支持的复合物也被发现在固态下具有 κ4(N,N,O,O) 结合基序,但是离散复合物的形成不需要额外的供体配体。对于任何过渡金属物种,都没有发现中性硫属元素供体与锆原子之间相互作用的证据。所有配合物都被筛选为与伯和仲氨基烯烃底物进行分子内加氢胺化反应的预催化剂。有趣的是,