A Broadly Applicable Strategy for Entry into Homogeneous Nickel(0) Catalysts from Air-Stable Nickel(II) Complexes.

A Broadly Applicable Strategy for Entry into Homogeneous Nickel(0) Catalysts from Air-Stable Nickel(II) Complexes.
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从空气稳定镍(II)配合物中进入均质镍(0)催化剂的广泛适用策略。

DOI:
10.1021/om500156q
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发表时间:
2014-04-28
期刊:
影响因子:
2.8
通讯作者:
Jamison TF
Jamison TF
中科院分区:
化学2区
文献类型:
--
作者:
Standley EA;Smith SJ;Müller P;Jamison TF

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合成了一系列空气稳定的L_2Ni(芳基)X(L =单齿膦,X = Cl,Br)和LNi(芳基)X(L =双膦)形式的镍配合物,并将其作为适合于各种镍催化转化的预催化剂库。这些配合物很容易由低成本的NiCl 2·6 H 2 O或NiBr 2·3 H 2 O和所需的配体,然后加入1当量的Grignard试剂合成。这些配合物的选择,其特征在于通过单晶X-射线衍射,并分析其结构特征。它们作为镍催化的羰基-烯反应的预催化剂的使用的案例研究,显示上级反应性相比,使用Ni(COD)2的反应。此外,由于预催化剂对空气都是稳定的,因此不需要手套箱或惰性气氛技术来将这些络合物用于镍催化的反应。
A series of air-stable nickel complexes of the form L2Ni(aryl) X (L = monodentate phosphine, X = Cl, Br) and LNi(aryl)X (L = bis-phosphine) have been synthesized and are presented as a library of precatalysts suitable for a wide variety of nickel-catalyzed transformations. These complexes are easily synthesized from low-cost NiCl2·6H2O or NiBr2·3H2O and the desired ligand followed by addition of 1 equiv of Grignard reagent. A selection of these complexes were characterized by single-crystal X-ray diffraction, and an analysis of their structural features is provided. A case study of their use as precatalysts for the nickel-catalyzed carbonyl-ene reaction is presented, showing superior reactivity in comparison to reactions using Ni(cod)2. Furthermore, as the precatalysts are all stable to air, no glovebox or inert-atmosphere techniques are required to make use of these complexes for nickel-catalyzed reactions.
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