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。
Ni<sup>II</sup>-(σ-Aryl) Complex Catalyzed Suzuki Reaction of Aryl Tosylates with Arylboronic Acids
作者:Xin-Heng Fan、Lian-Ming Yang
DOI:10.1002/ejoc.201000147
日期:2010.5
A practical, efficient protocol was developed for the Suzukireaction of aryltosylates with arylboronicacids. The process was promoted by a nickel-based catalyst system consisting of the easily available Ni II -(σ-aryl) complex and the simple ligand PPh 3 in toluene in the presence of the base K 2 CO 3 . The convenient operation, high yield, generality, and low cost make this method viable for most
为芳基甲苯磺酸酯与芳基硼酸的 Suzuki 反应开发了一种实用、有效的方案。在碱K 2 CO 3 存在下,由易得的Ni II -(σ-芳基)配合物和甲苯中的简单配体PPh 3 组成的镍基催化剂体系促进了该过程。该方法操作方便、收率高、通用性强、成本低,适用于大多数普通实验室和大规模制备。
An efficient practical tosylation of phenols, amines, and alcohols employing mild reagent [DMAPTs] + Cl −
esters from phenols and alcohols and sulfonamides from amines was achieved in excellent yields. Majority of the phenols irrespective of their substituents electronic nature underwent tosylation nearly at same reactionrate with an average yield of 95%. For amines, ring activating substituents favors rapid sulfonylation while the ring deactivating substituents relatively lowers the rate of tosylation
Chromatography-Free and Eco-Friendly Synthesis of Aryl Tosylates and Mesylates
作者:Xiangyang Lei、Anusha Jalla、Mhd Abou Shama、Jamie Stafford、Billy Cao
DOI:10.1055/s-0034-1378867
日期:——
Two chromatography-free and eco-friendly protocols have been developed to synthesize aryl tosylates and mesylates by the tosylation and mesylation of the corresponding hydroxyarenes, respectively. These protocols are superior to other known ones regarding the simplicity, reaction time and conditions, the range of substrates, yields, and environmental friendliness.
Reverdin; Crepieux, Bulletin de la Societe Chimique de France, 1901, vol. <3> 25, p. 1041