Microwave-enhanced synthesis of aryl nitriles using dimeric orthopalladated complex of tribenzylamine and K4[Fe(CN)6]
作者:Abdol Reza Hajipour、Fatemeh Rafiee、Arnold E. Ruoho
DOI:10.1016/j.tetlet.2011.11.087
日期:2012.2
(μ-Br)]2 complex was investigated in the synthesis of benzonitriles under both conventional and microwaveirradiationconditions and their results were compared together. This complex is an efficient, stable, and non-sensitive to air and moisture catalyst for the cyanation reaction. The substituted benzonitriles were produced of various arylhalides in excellent yields and short reaction times using a catalytic
在常规和微波辐射条件下,研究了Palladacycle [Pd C 6 H 4(CH 2 N(CH 2 Ph)2)}(μ-Br)] 2配合物在苄腈合成中的活性。一起。该配合物对于氰化反应是一种有效,稳定且对空气和水分催化剂不敏感的复合物。使用催化量的[Pd C 6 H 4(CH 2 N(CH 2 Ph)2)}(μ-Br)] 2络合物和K以优异的收率和较短的反应时间生产出各种芳基卤化物的取代苯甲腈130°C下在DMF中的4 [Fe(CN)6 ]。与常规加热条件相比,微波辐射下的反应在较短的反应时间内得到了更高的产率。
Amine-bridged bis(phenol) ligands for efficient Pd-catalyzed aqueous C-C coupling reactions
amine‐bridged bis(phenol) ligands (1, 2, 3) on palladium‐catalyzed aqueous C‐C coupling reactions were revealed. The homocoupling of arylboronic acid can be completed in neat water with the aid of a catalytic amount of p‐toluenesulfonyl chloride (TsCl) in a very short time under anaerobic or aerobic conditions. Interestingly, the same catalytic system was efficient for Suzuki–Miyaura reaction in aqueous acetone
CN-Dimeric ortho-palladated complex catalyzed cyanation of aryl halides under microwave irradiation
作者:Abdol Reza Hajipour、Fatemeh Rafiee
DOI:10.1007/s13738-014-0408-8
日期:2014.10
The catalytic activity of dimeric [PdC6H2(CH2CH2NH2)–(OMe)2,2,3}(m-Br)]2 complex was investigated in the synthesis of benzonitriles undermicrowaveirradiationconditions. The substituted benzonitriles were produced from various arylhalides in excellent yields and short reaction times using a catalytic amount of this complex as efficient, stable and air- and moisture-tolerant catalyst, and K4[Fe(CN)6]
Homocoupling of Arylboronic Acids Catalyzed by CuCl in Air at Room Temperature
作者:Guanjun Cheng、Meiming Luo
DOI:10.1002/ejoc.201001729
日期:2011.5
Homocoupling of arylboronicacids has been successfully carried out by using the inexpensive simple copper salt CuCl as the catalyst in methanol to obtain symmetric biaryls in good to excellent yields. The reaction proceeds with a CuCl loading of 2 mol-% under extremely mild conditions: in air, at room temperature, without the need of any additives such as base, oxidant, or ligand.
[Pd(Phbz)(X)(PPh<sub>3</sub>)] palladacycles promote the base-free homocoupling of arylboronic acids in air at room temperature
作者:Anant R. Kapdi、Gopal Dhangar、Jose Luis Serrano、Jose A. De Haro、Pedro Lozano、Ian J. S. Fairlamb
DOI:10.1039/c4ra09678a
日期:——
Homocoupling of arylboronicacids can be successfully achieved in commercial grade THF using [Pd(Phbz)(X)(PPh3)] palladacycles as catalysts (Phbz = N-phenylbenzaldimine; X = imidate or acetate). Symmetric biaryls were obtained in good yields working under mild conditions in an air atmosphere at room temperature. The reaction occurs without the addition of an exogenous base. The reaction conditions
使用[Pd(Phbz)(X)(PPh 3)] Palladacycles作为催化剂(Phbz = N-苯基苯甲二胺; X =亚氨酸酯或乙酸酯),可以在商业级THF中成功实现芳基硼酸的均偶联。在温和条件下,室温下在大气条件下以高收率获得对称的联芳基。该反应在不添加外源碱的情况下发生。优化反应条件以提供优异收率的均相偶联产物。已经收集了金属转移步骤对于催化剂前活化很重要的证据。已通过竞争实验评估了芳基硼酸的电子性质对均偶联反应结果的影响。