Copper-Catalyzed Decarboxylative Cross-Coupling of Potassium Polyfluorobenzoates with Aryl Iodides and Bromides
作者:Rui Shang、Yao Fu、Yan Wang、Qing Xu、Hai-Zhu Yu、Lei Liu
DOI:10.1002/anie.200904916
日期:2009.11.23
For copper only: The decarboxylative cross‐coupling of readily accessible and nonvolatile potassiumpolyfluorobenzoates with aryliodides and bromides using a copper catalyst provides polyfluorobiaryls and polyfluorostilbenes in excellent yields (see scheme). Mechanistic analyses are reported for the title reaction.
Pd-Catalyzed Decarboxylative Cross Coupling of Potassium Polyfluorobenzoates with Aryl Bromides, Chlorides, and Triflates
作者:Rui Shang、Qing Xu、Yuan-Ye Jiang、Yan Wang、Lei Liu
DOI:10.1021/ol100008q
日期:2010.3.5
Pd-catalyzed decarboxylative cross coupling of potassiumpolyfluorobenzoates with arylbromides, chlorides, and triflates is achieved by using diglyme as the solvent. The reaction is useful for synthesis of polyfluorobiaryls from readily accessible and nonvolatile polyfluorobenzoate salts. Unlike the Cu-catalyzed decarboxylation cross coupling where oxidative addition is the rate-limiting step, in
Decarboxylative Cross-Coupling of Acyl Fluorides with Potassium Perfluorobenzoates
作者:Liyan Fu、Qiang Chen、Yasushi Nishihara
DOI:10.1021/acs.orglett.0c02215
日期:2020.8.21
We report the transition metal-free decarboxylative cross-coupling reactions of acyl fluorides with potassium perfluorobenzoates. Compared with traditional transition metal-catalyzed cross-couplings, this protocol presents an extremely environmentally benign pathway to afford unsymmetrical diaryl ketones. To install perfluorophenyl groups, this method highlights highly selective, inexpensive, and nontoxic
Heterodinuclear zinc and magnesium catalysts for epoxide/CO<sub>2</sub> ring opening copolymerizations
作者:Gemma Trott、Jennifer A. Garden、Charlotte K. Williams
DOI:10.1039/c9sc00385a
日期:——
featuring carboxylate co-ligands are prepared and characterized. The best catalysts show very high activities for copolymerization using cyclohexene oxide (TOF = 8880 h−1, 20 bar CO2, 120 °C, 0.01 mol% catalyst loading) or cyclopentene oxide. All the catalysts are highlyactive in the low pressure regime and specifically at 1 bar pressure CO2. The polymerization kinetics are analysed using in situ spectroscopy
二氧化碳和环氧化物的开环共聚是制备脂肪族聚碳酸酯和增加CO 2价值的有用手段。最近,第一个异双核 Zn( II )/Mg( II ) 催化剂表现出比任一同双核类似物更高的活性 ( J. Am. Chem. Soc. 2015 , 137, 15078–15081)。基于这一初步发现,本文制备并表征了八种具有羧酸盐共配体的新型 Zn( II )/Mg( II ) 异双核催化剂。最好的催化剂在使用环己烯氧化物(TOF = 8880 h -1、20 bar CO 2、120 °C、0.01 mol% 催化剂负载量)或环戊烯氧化物时表现出非常高的共聚活性。所有催化剂在低压状态下特别是在1巴压力CO 2下均具有高活性。使用原位光谱和等分技术分析聚合动力学:速率定律总体上是二阶的,催化剂和环氧化物浓度都具有一阶依赖性,二氧化碳压力为零阶。比较催化剂系列的伪一级速率系数值,差异主要归因于对引发速率的影响
Highly efficient heterogeneous copper-catalyzed decarboxylative cross-coupling of potassium polyfluorobenzoates with aryl halides leading to polyfluorobiaryls
作者:Yang Lin、Mingzhong Cai、Zhiqiang Fang、Hong Zhao
DOI:10.1039/c7ra05711c
日期:——
reaction of potassium polyfluorobenzoates with aryl iodides and bromides was achieved in diglyme or DMAc at 130 or 160 °C in the presence of 10–20 mol% of a 1,10-phenanthroline-functionalized MCM-41-immobilized copper(I) complex, [MCM-41-Phen-CuI], yielding a variety of polyfluorobiaryls in good to excellent yields. This heterogeneous copper(I) complex could easily be prepared via a simple procedure