Reactivity Study of Pyridyl-Substituted 1-Metalla-2,5-diaza-cyclopenta-2,4-dienes of Group 4 Metallocenes
作者:Lisanne Becker、Fabian Reiß、Kai Altenburger、Anke Spannenberg、Perdita Arndt、Haijun Jiao、Uwe Rosenthal
DOI:10.1002/chem.201601337
日期:2016.7.25
molecules is investigated. The addition of H2, CO2, Ph−C≡N, 2‐py−C≡N, 1,3‐dicyanobenzene or 2,6‐dicyanopyridine results in exchange reactions, which are accompanied by the elimination of a nitrile. For CO2, a coordination to the five‐membered cycle occurs in case of Cp*2Zr(N=C(2‐py)−C(2‐py)=N). A 1,4‐diaza‐buta‐1,3‐diene complex is formed by H‐transfer in the conversion of the analogous titanocene
在这项工作中,研究了第4组茂金属(尤其是吡啶基取代的实例)的1-金属1,2,5,二氮杂,环戊2,4,二烯对小分子的反应性。H 2,CO 2,Ph-C≡N,2-py-C≡N,1,3-二氰基苯或2,6-二氰基吡啶的添加导致交换反应,并伴随着腈的消除。对于CO 2,在Cp * 2 Zr(N = C(2-py)-C(2-py)= N)的情况下会发生五元循环。在类似的钛茂化合物与CH 3- C≡N,PhCH 2- C≡N或丙酮的转化中,通过H-转移形成1,4-二氮杂-buta-1,3-二烯络合物。对于CH 3-C≡N还建立了三个乙腈分子的偶联产物。为了从偶联的腈中分离出茂金属,我们检查了与HCl,PhPCl 2,PhPSCl 2和SOCl 2的反应。在最后一种情况下,获得了各自的噻二唑氧化物和茂金属二氯化物。随后的反应产生了噻二唑。