Selective Incorporation of Primary Amines into a Trizirconium Imido System and Catalyic Cyclization of Aminoalkynes
作者:Masataka Oishi、Yusuke Nakanishi、Hiroharu Suzuki
DOI:10.1021/acs.inorgchem.7b01311
日期:2017.8.21
Thermolysis of a mixture of 3 and 4 led to C–H bond activation, giving rise to the zirconaaziridines [LZr(η2-NCHR)}(LZr)(LHZr)(μ-NHCH2R)] (12, R = Et, Me). Complex 2 proved to be a competent precatalyst in the hydroamination of the aminoalkynes (H2NCH2CR12CH2C≡CR2) (13, R1 = H, R2 = Bu, Ph, t-Bu; 14, R1 = Me, R2 = Et, Ph). Stoichiometric or semicatalytic reactions of 2 and the aminoalkynes were studied
通过Zr(NMe 2)4与(四甲基环戊二烯基的)内烯烃异构体之间的胺消除反应合成三核锆亚氨基配合物[LZr(NMe 2)} 3 ](2,L = C 5 Me 4 CH 2 CH 2 N)乙胺(LH 3)(1)。为了研究三锆体系的基本反应性,反应2用伯胺进行了检查。观察到伯胺的选择性结合,这取决于胺底物的空间和电子性质。胺掺入络合物[(LZrNHR)(LHZrNHR)(LHZr)(μ-NHR)(μ 3 -NR)](3,R = PR等),[(LZrNHR)2(LHZr)(μ-NR) ](4,R = Pr,i -Bu),[(LZr)2(LZrNMe 2)(μ-NR)](5,R = neo -Pen)和[(LZr)(LZrNHAr)(LH 2 Zr )(μ-NAr)2 ](6,Ar = Ph,C 6 H 4 -4-Br,C 6 H 4通过NMR和XRD分析在结构上表征了-4-OMe),并显示了底