当前位置: X-MOL 学术Organometallics › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
The Synthesis and Catalytic Activity of New Mixed NHC-Phosphite Nickel(0) Complexes
Organometallics ( IF 2.5 ) Pub Date : 2019-12-27 , DOI: 10.1021/acs.organomet.9b00672
Jeremy Duczynski 1 , Alexandre N. Sobolev 1, 2 , Stephen A. Moggach 1, 2 , Reto Dorta 1 , Scott G. Stewart 1
Affiliation  

Herein we describe the synthesis and isolation of the first low-valent NHC-phosphite nickel complexes of general formula Ni(NHC)[P(OAr)3]2. These three-coordinate Ni(0) compounds were fully characterized, including by X-ray crystallography that highlighted their trigonal planar geometry. The representative complex Ni(IMes)[P(OPh)3]2 was used to show that a phosphite ligand is readily substituted in the presence of an aldehyde or nitrile. These stoichiometric studies then led to an investigation of their catalytic properties in the Suzuki–Miyaura cross-coupling reactions between aryl tosylates and aryl boronic acids, a first for such a NHC-Ni catalyst. Finally, mechanistic investigations led to the isolation of a well-defined oxidative addition product.

中文翻译:

新型混合NHC-亚磷酸镍(0)配合物的合成及催化活性

在这里,我们描述了通式Ni(NHC)[P(OAr)3 ] 2的第一批低价NHC-亚磷酸镍配合物的合成和分离。这些三坐标的Ni(0)化合物得到了充分的表征,包括通过X射线晶体学突出了它们的三角形平面几何形状。代表性络合物Ni(IMes)[P(OPh)3 ] 2“亚磷酸酯”用于表明亚磷酸酯配体在醛或腈的存在下容易被取代。这些化学计量的研究随后导致对它们在芳基甲苯磺酸盐和芳基硼酸之间的Suzuki-Miyaura交叉偶联反应中的催化性能的研究,这是此类NHC-Ni催化剂的首次应用。最后,机理研究导致分离出明确定义的氧化加成产物。
更新日期:2019-12-27
down
wechat
bug