An efficient palladium–benzimidazolyl phosphine complex for the Suzuki–Miyaura coupling of aryl mesylates: facile ligand synthesis and metal complex characterization
作者:Kin Ho Chung、Chau Ming So、Shun Man Wong、Chi Him Luk、Zhongyuan Zhou、Chak Po Lau、Fuk Yee Kwong
DOI:10.1039/c2cc15972d
日期:——
A new class of easily accessible hemilabile benzimidazolyl phosphine ligands has been developed. The ligand skeleton is prepared from commercially available and inexpensive o-phenylenediamine and 2-bromobenzoic acid. With catalyst loading down to 0.5 mol% palladium, excellent catalytic activity towards the Suzuki-Miyaura coupling of aryl mesylates is still observed. This represents the lowest catalyst
Addressing Challenges in Palladium-Catalyzed Cross-Couplings of Aryl Mesylates: Monoarylation of Ketones and Primary Alkyl Amines
作者:Pamela G. Alsabeh、Mark Stradiotto
DOI:10.1002/anie.201303305
日期:2013.7.8
Mor(DalPhos) for Me(sylates): Described are the first examples of ketone mono‐α‐arylation and primary aliphatic aminemonoarylation employing aryl methanesulfonate coupling partners. A range of functionalized arylmesylates were employed with dialkyl ketones, and also with primary and secondary amines as well as the otherwise challenging coupling partners acetone and methylamine. Ad=adamantyl.
Room-Temperature Nickel-Catalysed Suzuki-Miyaura Reactions of Aryl Sulfonates/Halides with Arylboronic Acids
作者:Xin-Heng Fan、Lian-Ming Yang
DOI:10.1002/ejoc.201001519
日期:2011.3
Room-temperature Suzuki―Miyaura aryl―aryl cross-coupling reactions have been achieved in high yields by using an easily accessible, air-stable Ni II ―(σ-aryl) complex as precatalyst without either the pretreatment of organometallic reagents or the presence of external reductants. The Ni II complex, in conjunction with monophosphane ligands such as PCy 3 ·HBF 4 or PPh 3 , allowed the efficient cross-coupling
室温下 Suzuki-Miyaura 芳基-芳基交叉偶联反应已通过使用易于获得、空气稳定的 Ni II-(σ-芳基) 配合物作为预催化剂以高产率实现,无需有机金属试剂的预处理或存在外部还原剂。Ni II 配合物与单膦配体如 PCy 3 ·HBF 4 或 PPh 3 结合,允许芳基磺酸盐(OTs、OMs)和/或卤化物(Cl、Br、I)与芳基硼酸在在作为碱的 K 2 CO 3 存在下,在甲苯/水中室温。
Enantioselective Intermolecular Heck and Reductive Heck Reactions of Aryl Triflates, Mesylates, and Tosylates Catalyzed by Nickel
作者:Xiaolei Huang、Shenghan Teng、Yonggui Robin Chi、Wenqiang Xu、Maoping Pu、Yun‐Dong Wu、Jianrong Steve Zhou
DOI:10.1002/anie.202011036
日期:2021.2.8
Nickel‐catalyzed intermolecular Heckreaction of cycloalkenes proceeds well with aryl triflates, mesylates and tosylates in excellent enantiomeric ratios. The asymmetric reductive Heckreaction also works with a 2‐cyclopentenone ketal, which is equivalent to conjugate arylation of the enone itself.
A pyridine-bridged bis-benzimidazolylidene pincer nickel(ii) complex: synthesis and practical catalytic application towards Suzuki–Miyaura coupling with less-activated electrophiles
A novel robust pyridine-bridgedbis-benzimidazolylidene nickel pincercomplex 3 accessible from inexpensive, commercially available precursors efficiently catalyzes the first practical Suzuki-Miyaura cross-coupling reactions with various less-reactive electrophiles ArX (X = Br, Cl, OTs and OMs) and even tolerates electron-rich, sterically demanding and heterocyclic arenes in the presence of catalytic