Expanding the scope of the Cu assisted Suzuki–Miyaura reaction
摘要:
Recent advances in the development of the copper facilitated Suzuki-Miyaura reaction are described. Improvements include expansion of substrate scope to include aryl chlorides and polyhalo aryl boronates. It was found that use of S-Phos and X-Phos could accomplish the coupling of 2-pyridyl boronates to aryl chlorides and bromides in shorter reaction times and in higher yield than previously described with DPPF. (C) 2011 Elsevier Ltd. All rights reserved.
Well‐Defined Ni(0) and Ni(II) Complexes of Bicyclic (Alkyl)(Amino)Carbene (
<sup>Me</sup>
BICAAC): Catalytic Activity and Mechanistic Insights in Negishi Cross‐Coupling Reaction
作者:Sandeep Kumar Thakur、Mandeep Kaur、Krishna Kumar Manar、Manu Adhikari、Angshuman Roy Choudhury、Sanjay Singh
DOI:10.1002/chem.202202237
日期:2022.10.21
were coupled with phenylzinc bromides in Negishi cross-coupling reaction catalyzed by MeBICAAC-nickel complexes. The active species are deciphered by means of UV-vis, HRMS and NMR measurements and support the involvement of Ni(I)/Ni(III) species in the reaction promoted by [(MeBICAAC)2NiIICl2] pre-catalyst whereas, Ni(0)/Ni(II) cycle operates when the Ni(0) complex, [(MeBICAAC)2Ni0] was used as pre-catalyst
在Me BICAAC-镍配合物催化的 Negishi 交叉偶联反应中,多种芳基卤化物与溴化苯基锌发生偶联。活性物质通过 UV-vis、HRMS 和 NMR 测量进行破译,并支持 Ni(I)/Ni(III) 物质参与 [( Me BICAAC) 2 Ni II Cl 2 ] 预催化剂促进的反应而当Ni(0)配合物[( Me BICAAC) 2 Ni 0 ]用作预催化剂时,Ni(0)/Ni(II)循环运行。