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Diastereoselective synthesis of functionally substituted alkene dimers and oligomers, catalysed by chiral zirconocenes
Catalysis Communications ( IF 3.7 ) Pub Date : 2018-11-01 , DOI: 10.1016/j.catcom.2018.10.032
Pavel V. Kovyazin , Il'giz N. Abdullin , Lyudmila V. Parfenova

The research addresses the reaction of terminal alkenes and propene with AlR3 (R = Me, Et) in the presence of chiral Zr complexes, rac-[Y(η5-C9H10)2]ZrCl2 (Y = C2H4, SiMe2) or (NMI)2ZrCl2 (NMI- η5–neomenthylindenyl), and methylaluminoxane. The effect of reaction conditions, catalyst and trialkylalane structure on the substrate conversion and the reaction chemo- and stereoselectivity has been studied. The reaction predominantly goes via the stage of alkene methyl(ethyl)zirconation with subsequent introduction of substrate molecules into the Zr-C bond. As a result, a diastereoselective one-pot method for the synthesis of functionally substituted linear terminal alkene dimers and propene oligomers was developed.



中文翻译:

手性锆茂催化的功能取代的烯烃二聚体和低聚物的非对映选择性合成

研究地址末端烯烃的反应和丙烯与为AlR 3中的手性锆复合物,的存在下(R =甲基,乙基)外消旋- [Y(η 5 -C 9 ħ 102 ]的ZrCl 2(Y = C 2 ħ 4,森达2)或(NMI)2的ZrCl 2(NMI- η 5–neomenthylindenyl)和甲基铝氧烷。研究了反应条件,催化剂和三烷基铝烷结构对底物转化率以及反应化学和立体选择性的影响。该反应主要经历烯烃甲基(乙基)锆化的阶段,随后将底物分子引入Zr-C键中。结果,开发了用于合成官能取代的线性末端烯烃二聚体和丙烯低聚物的非对映选择性一锅法。

更新日期:2018-11-01
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