Highly Efficient Monophosphine-Based Catalyst for the Palladium-Catalyzed Suzuki−Miyaura Reaction of Heteroaryl Halides and Heteroaryl Boronic Acids and Esters
作者:Kelvin Billingsley、Stephen L. Buchwald
DOI:10.1021/ja068577p
日期:2007.3.1
active and efficient catalyst system derived from a palladium precatalyst and monophosphine ligands 1 or 2 for the Suzuki-Miyaura cross-coupling reaction of heteroaryl boronic acids and esters has been developed. This method allows for the preparation of a wide variety of heterobiaryls in good to excellent yields and displays a high level of activity for the coupling of heteroaryl chlorides as well as
Sterically hindered N-aryl/benzyl substituted piperidoimidazolin-2-ylidene palladium complexes and their catalytic activities
作者:Elif Gacal、Serpil Denizaltı、Armağan Kınal、Aytaç Gürhan Gökçe、Hayati Türkmen
DOI:10.1016/j.tet.2018.10.003
日期:2018.11
cross coupling. The N-aryl substituted complex 3b was a highly efficient precatalyst and successfully employed in Suzuki-Miyaura cross coupling reactions of (hetero)aryl chlorides with arylboronic acids in air. In addition, the oxidativeaddition step of the reaction mechanism involving chlorobenzene and the catalysts 3a, 3b, 3c and 3d were computationally investigated by the DFT-ω-B97X-D method and
制备了一系列的N-芳基(2a,b)或苄基(2c,d)取代的哌啶并咪唑啉盐及其钯配合物(3a - d),并通过1 H,13 C NMR,IR光谱和元素分析进行了表征。3a和3c的晶体结构已经通过X射线晶体学确定。热重分析(TGA)用于复合物(3a – d)。钯配合物已被用作铃木-宫浦交叉偶联的催化剂。N-芳基取代的配合物3b是一种高效的预催化剂,已成功用于空气中(杂)芳基氯与芳基硼酸的Suzuki-Miyaura交叉偶联反应。此外,通过DFT-计算方法研究了涉及氯苯与催化剂3a,3b,3c和3d的反应机理的氧化加成步骤。ω-B97X-D法与催化结果完全吻合。为了测量新配体的σ-给体和π-受体性质,还制备了羰基铑配合物。
Micellar Catalysis of Suzuki−Miyaura Cross-Couplings with Heteroaromatics in Water
作者:Bruce H. Lipshutz、Alexander R. Abela
DOI:10.1021/ol801712e
日期:2008.12.4
Pd-catalyzed couplings involving several heteroaromatic halides (bromides and chlorides) as well as boronic acids can be done under exceedingly mild conditions (between rt and 40 degrees C) in pure water using commercially available Pd catalysts and PTS, a nanomicelle-forming amphiphile.