Asymmetric Intra- and Intermolecular Hydroamination Catalyzed by 3,3′-Bis(trisarylsilyl)- and 3,3′-Bis(arylalkylsilyl)-Substituted Binaphtholate Rare-Earth-Metal Complexes
作者:Hiep N. Nguyen、Hyeunjoo Lee、Stephan Audörsch、Alexander L. Reznichenko、Agnieszka J. Nawara-Hultzsch、Bernd Schmidt、Kai C. Hultzsch
DOI:10.1021/acs.organomet.8b00510
日期:2018.12.10
activity in the hydroamination/cyclization of aminoalkenes, with activities exceeding 1000 h–1 for (R)-2f-Ln, (R)-2g-Ln, and (R)-2h-Ln in the cyclization of 2,2-diphenylpent-4-enylamine (3a) at 25 °C, while the rigid dibenzosilole-substituted complexes (R)-2a-Ln and the triisopropylsilyl-substituted complexes (R)-2d-Ln exhibited the lowest activity in the range of 150–270 h–1. Catalysts (R)-2b-Lu, (R)-2c-Lu
一系列新颖的3,3'-双(三芳基甲硅烷基)-和3,3'-双(芳基烷基甲硅烷基)取代的邻萘二甲酸稀土金属配合物2a - i(SiR 3 = Si(o-联苯撑)Ph(a) ,SiCyPh 2(b),Si- t- BuPh 2(c),Si(i- Pr)3(d),SiCy 2 Ph(e),Si(2-甲苯基)Ph 2(f),Si(4 -吨-Bu-C 6 H ^ 4)3(克),硅(4-的MeO-C6 ħ 4)PH 2(ħ),SiBnPh 2(我))已经通过从[LN(芳烃消除制备ö -C 6 ħ 4 CH 2 NME 2)3 ](Ln为Y,Lu)和相应的3- ,3′-双(甲硅烷基)取代的联萘酚。络合物表现出高的催化活性在aminoalkenes的加氢胺化/环化,与活动超过在1000小时-1为(- [R )- 2F - LN,([R )- 2克- LN,和(- [R )-2H - LN在2,2- diphenylpent