Cross-Coupling of Aryl/Alkenyl Ethers with Aryl Grignard Reagents through Nickel-Catalyzed CO Activation
作者:Lan-Gui Xie、Zhong-Xia Wang
DOI:10.1002/chem.201003731
日期:2011.4.26
achieved through the cleavage of the sp2 CO bond of aryl/alkenyl ethers catalyzed by a nickel complex, and by using Grignard reagents as nucleophiles (see scheme). This method displays a broad substrate scope and leads to good to excellent yields of the aryl–aryl or alkenyl–aryl cross‐coupling products.
Pincer-Nickel-Catalyzed Cross-Coupling of Aryl Sulfamates with Arylzinc Chlorides
作者:Jian-Long Tao、Zhong-Xia Wang
DOI:10.1002/ejoc.201500987
日期:2015.9
The nickel N,N,N-pincer complex 2 was demonstrated to effectively catalyze the cross-coupling of arylsulfamates with arylzincchlorides under mild conditions. The reaction is suitable for a wide range of substrates, and tolerates various functional groups.
The cross-coupling reaction of arylboronicacids (1.3 equivs) with aryl methane-sulfonates was carried out in the presence of a nickel(0) catalyst (3 mol%) and K3PO4·nH2O (3 equivs). The use of toluene as the solvent and the nickel(0)-dppf catalyst prepared from NiCl2(dppf) plus dppf with BuLi were recognized to be the most efficient to achieve both high yields and high selectivity. The reaction can
在镍(0)催化剂(3摩尔%)和K 3 PO 4 ·nH 2 O(3当量)的存在下,进行芳基硼酸(1.3当量)与芳基甲烷磺酸盐的交叉偶联反应。公认使用甲苯作为溶剂以及由NiCl 2(dppf)加dppf与BuLi制备的镍(0)-dppf催化剂是实现高收率和高选择性的最有效方法。该反应可用于各种电子不足和富集的芳基甲磺酸盐,以得到高产率。
Direct Arylation/Alkylation/Magnesiation of Benzyl Alcohols in the Presence of Grignard Reagents via Ni-, Fe-, or Co-Catalyzed sp<sup>3</sup> C–O Bond Activation
作者:Da-Gang Yu、Xin Wang、Ru-Yi Zhu、Shuang Luo、Xiao-Bo Zhang、Bi-Qin Wang、Lei Wang、Zhang-Jie Shi
DOI:10.1021/ja307045r
日期:2012.9.12
Direct application of benzyl alcohols (or their magnesium salts) as electrophiles in various reactions with Grignardreagents has been developed via transition metal-catalyzed sp(3) C-O bond activation. Ni complex was found to be an efficient catalyst for the first direct cross coupling of benzyl alcohols with aryl/alkyl Grignardreagents, while Fe, Co, or Ni catalysts could promote the unprecedented
已经通过过渡金属催化的 sp(3) CO 键活化开发了苯甲醇(或其镁盐)在与格氏试剂的各种反应中作为亲电试剂的直接应用。发现 Ni 配合物是苯甲醇与芳基/烷基格氏试剂首次直接交叉偶联的有效催化剂,而 Fe、Co 或 Ni 催化剂可以促进苯甲醇在( n) 己基MgCl。这些方法提供了将苯甲醇转化为各种功能的直接途径。
Parallel and Combinatorial Liquid-Phase Synthesis of Alkylbiphenyls Using Pentaerythritol Support
作者:Wang-Kyu Kim、Jong-Hoon Jang、Hyunjong Jo、Kwangyong Park
DOI:10.1021/co400136k
日期:2014.5.12
Unfunctionalized alkylbiphenyls were fabricated by a parallel and combinatorial synthesisusing pentaerythritol as a tetrapodal soluble support for a sulfonate-based traceless multifunctional linker system. Nickel N-heterocyclic carbene-catalyzed reactions of pentaerythritol tetrakis(biphenylsulfonate)s with primary alkylmagnesium bromides generated the alkylbiphenyl derivatives by desulfitative c