A 2-((4-Arylpiperazin-1-yl)methyl)phenol ligated Pd(<scp>ii</scp>) complex: an efficient, versatile catalyst for Suzuki–Miyaura cross-coupling reactions
作者:Srinivas Keesara、Saiprathima Parvathaneni
DOI:10.1039/c5nj03450g
日期:——
N,N,O-Tridentate palladium(ii) complex 4a was found to be an efficient catalyst for the Suzuki cross-couplingreaction of aryl halides (iodo-, bromo- and chloro-), which afforded cross-coupling products in good to excellent yields.
N,N,O-三齿钯 (ii) 配合物 4a 被发现是芳基卤化物(碘-、溴-和氯-)的 Suzuki 交叉偶联反应的有效催化剂,可提供良好的交叉偶联产物优良的产量。
Synthesis of18F-labelled biphenyls via SUZUKI cross-coupling with 4-[18F]fluoroiodobenzene
作者:Björn Steiniger、Frank R. Wuest
DOI:10.1002/jlcr.1099
日期:2006.8
The SUZUKI reaction of organoboron compounds with 4-[18F]fluoroiodobenzene has been developed as a novel radiolabelling technique in 18F chemistry. The cross-coupling reaction of p-tolylboronic acid with 4-[18F]fluoroiodobenzene was used to screen different palladium complexes, bases and solvents. Optimized reaction conditions (Pd2(dba)3, Cs2CO3, acetonitrile, 60°C for 5 min) were further applied to
Palladium-Catalyzed Cyanation of Aryl Sulfonium Salts
作者:Mengna Liu、Benqiang Cui、Chuntao Zhong、Yanhui Shi、Yanfeng Dang、Changsheng Cao
DOI:10.1021/acs.orglett.3c00829
日期:2023.6.9
dimethylsulfonium salts using cheap, nontoxic, and bench-stable K4[Fe(CN)6]·3H2O as the cyanating reagent has been developed. The reactions proceeded well under base-free conditions with various sulfonium salts and provided aryl nitrile with yields of up to 92%. Aryl sulfides can be transformed to aryl nitriles directly via a one-pot process, and the protocol is scalable. Density functional theory calculations
使用廉价、无毒且实验室稳定的 K 4 [Fe(CN) 6 ]·3H 2 O 作为氰化试剂,开发了钯催化的芳基二甲基锍盐氰化反应。该反应在无碱条件下使用各种硫鎓盐进行得很好,并以高达 92% 的产率提供芳基腈。芳基硫化物可以通过一锅法直接转化为芳基腈,并且该协议是可扩展的。进行密度泛函理论计算以研究涉及氧化加成、配体交换、还原消除和再生以产生产物的催化循环的反应机理。
Novel thiophenes and analogues with anthelmintic activity against Haemonchus contortus
作者:Isabel C González、Leon N Davis、Charles K Smith
DOI:10.1016/j.bmcl.2004.05.044
日期:2004.8
A new series of analogues of 4-(4-fluorophenyl)-2-methylthio-thiophene-3-carbonitrile (1) were synthesized and evaluated for their in vitro and in vivo anthelmintic activity against Haemonchus contortus. (C) 2004 Elsevier Ltd. All rights reserved.
Mechanochemical Synthesis of Aryl Fluorides by Using Ball Milling and a Piezoelectric Material as the Redox Catalyst
作者:Xiaohong Wang、Xuemei Zhang、Li Xue、Qingqing Wang、Fengzhi You、Lunzhi Dai、Jiagang Wu、Søren Kramer、Zhong Lian
DOI:10.1002/anie.202307054
日期:2023.9.25
structural motifs in many pharmaceuticals. A new protocol, starting from aryldiazonium salts, that uses ball milling and piezoelectric materials as redox catalysts is described. This process addresses the limitations of the Balz–Schiemann procedure, which is currently used in industry. In addition, the mechanism of this fluorination reaction is also investigated.