Synthesis of zwitterionic palladium complexes and their application as catalysts in cross-coupling reactions of aryl, heteroaryl and benzyl bromides with organoboron reagents in neat water
作者:V. Ramakrishna、N. Dastagiri Reddy
DOI:10.1039/c7dt01433c
日期:——
found to be highly active for carrying out these reactions between aryl bromides and organoboron reagents. Further, the scope of the catalyst I was also examined by employing (hetero)aryl bromides, hydrophilic aryl bromides, benzylbromides and various organoboron reagents. More than 80 aryl/benzyl bromide-arylboronic acid combinations were screened in neat water/K2CO3 and found that I is a versatile catalyst
N-(3-氯-2-喹喔啉基)-N'-芳基咪唑鎓盐(芳基= 2,6-二异丙基苯基[HL1Cl] Cl,芳基=甲苯基[HL2Cl] Cl)已通过将2,3-二氯喹喔啉与N'-芳基咪唑纯净。这些咪唑鎓盐与Pd(PPh 3)4和Pd 2(dba)3 / PPh 3(dba =二苄基苯丙酮)在50 o C的容易反应,得到两性离子钯(II)络合物[Pd(HL1)(PPh 3) Cl 2 ](I)和[Pd(HL2)(PPh 3)Cl 2 ](II)的收率极高。已测试I和II在纯水/ K中催化Suzuki-Miyaura交叉偶联(SMC)反应的能力2 CO 3,对在芳基溴化物和有机硼试剂之间进行这些反应具有很高的活性。此外,还通过使用(杂)芳基溴化物,亲水性芳基溴化物,苄基溴化物和各种有机硼试剂来检查催化剂I的范围。在纯水/ K 2 CO 3中筛选了80多种芳基/苄基溴-芳基硼酸组合,发现I是一种多用途催化
A fast and oxygen-promoted protocol for the ligand-free Suzuki reaction of 2-halogenated pyridines in aqueous media
作者:Chun Liu、Weibo Yang
DOI:10.1039/b912364d
日期:——
A fast protocol has been developed for the construction of 2-aryl-substituted pyridine derivatives by the oxygen-promoted, ligand-free, Pd(OAc)2-catalyzed Suzuki reaction of 2-halogenated pyridines in aqueous isopropanol.
The photochemical arylation of pyrimidines and pyrazines proceeds smoothly under moderate UVA irradiation and allows us to obtain high-value biaryl compounds through radical intermediates.
Insight into Copper Catalysis: In Situ Formed Nano Cu<sub>2</sub>O in Suzuki–Miyaura Cross-Coupling of Aryl/Indolyl Boronates
作者:Ganapathy Ranjani、Rajagopal Nagarajan
DOI:10.1021/acs.orglett.7b01669
日期:2017.8.4
aryl and indole boronates has been explored in good to excellent yields. In situ generation of nano-Cu2O from CuCl2 under the reaction conditions has been discovered for the first time. The generality of the reaction was further demonstrated by the arylation of 5-iodopyrimidine, iodopyridines, iodobenzenes, and diiodobenzenes and resulted in good to moderate yields. Moreover, bisindole alkaloid Scalaridine
Bimetallic Pd–Ag nanoclusters decorated micro-cellulose bio-template towards efficient catalytic Suzuki–Miyaura coupling reaction of nitrogen-rich heterocycles
作者:Prantika Bhattacharjee、Anindita Dewan、Purna K. Boruah、Manash R. Das、Sanjeev P. Mahanta、Ashim J. Thakur、Utpal Bora
DOI:10.1039/d2gc01871c
日期:——
bio-template for Pd–Ag bimetallic nanoclusters and its formation is substantiated by standard analytical studies. The interfacial electron-transfer from the plasmonic metal Ag to Pd makes the newly developed heterogeneous-catalyst suitable for room temperature Suzuki–Miyaura coupling of nitrogen-rich heterocycles (74–93%) under visiblelight conditions. The enhanced catalytic activity, stability, and