Chemo-, regio-, and stereo-selective perfluoroalkylations by a Grignard complex with zirconocene
作者:Motohiro Fujiu、Kazuyuki Negishi、Jie Guang、Paul G. Williard、Shigeki Kuroki、Koichi Mikami
DOI:10.1039/c5dt03039k
日期:——
The synthesis of highly reactive perfluoroalkyl Grignard reagents with early transition metal zirconocene complexes and their new types of highly chemo-, regio-, and stereo-selective perfluoroalkylation reactions are reported with epoxides in particular. The zirconocene complex is advantageous in activating the perfluoroalkyl Grignard species. The zirconocene·Grignard complexes were clarified by DOSY
Paradigm Shift from Alkaline (Earth) Metals to Early Transition Metals in Fluoroorganometal Chemistry: Perfluoroalkyl Titanocene(III) Reagents Prepared via Not Titanocene(II) but Titanocene(III) Species
Perfluoroalkyl (RF) titanocene reagents [Cp2TiIIIRF] synthesized via [Cp2TiIIICl] rather than [Cp2TiII] show new types of perfluoroalkylation reactions. The [Cp2TiIIIRF] reagents exhibit a wide variety of reactivity with carbonyl compounds including esters and nitriles, and selectivities far higher than those reported for conventional RFLi and RFMgX reagents.
通过[Cp 2 Ti III Cl]而不是[Cp 2 Ti II ]合成的全氟烷基(R F)钛茂试剂[Cp 2 Ti III R F ]显示了新型的全氟烷基化反应。[Cp 2 Ti III R F ]试剂与包括酯和腈在内的羰基化合物具有广泛的反应性,其选择性远远高于传统R F Li和R F MgX试剂的报道。
Well-Defined CuC<sub>2</sub>F<sub>5</sub>Complexes and Pentafluoroethylation of Acid Chlorides
作者:Liubov I. Panferova、Fedor M. Miloserdov、Anton Lishchynskyi、Marta Martínez Belmonte、Jordi Benet-Buchholz、Vladimir V. Grushin
DOI:10.1002/anie.201500341
日期:2015.4.20
showing that the C2F5‐ligated Cu atom can be di‐ (5), tri‐ (2 and 3), and tetracoordinate (4). The mixed phen‐PPh3 complex 4 is a highly efficient fluoroalkylating agent for a broad variety of acidchlorides. This high‐yielding transformation represents the first general method for the synthesis of RCOC2F5 from the corresponding RCOCl.
制备了四个带有C 2 F 5配体的定义明确的Cu I络合物,并对其进行了全面表征:[(Ph 3 P)2 CuC 2 F 5 ](2),[(bpy)CuC 2 F 5 ](3) ,[(Ph 3 P)Cu(phen)C 2 F 5 ](4)和[(IPr *)CuC 2 F 5 ](5)。确定了全部四个的X射线结构,表明C 2 F 5连接的Cu原子可以是二(5),三(2和3)和四坐标(4)。混合的phen-PPh 3络合物4是一种高效的氟代烷基化剂,适用于多种酰氯。这种高产的转化代表了从相应的RCOCl合成RCOC 2 F 5的第一种通用方法。
Continuous-Flow Synthesis of Perfluoroalkyl Ketones via Perfluoroalkylation of Esters Using HFC-23 and HFC-125 under a KHMDS–Triglyme System
chemical transformation of two HFCs, viz. HFC-23 and HFC-125, based on the continuous-flow perfluoroalkylation of esters to synthesize the pharmaceutically and agrochemically vital trifluoromethyl and pentafluoroethyl ketones. The combination of a potassium base and a glyme solvent system is found to be the most effective. The proposed method is attractive for industrial use because it allows the consumption
Palladium-catalyzed fluoroacylation of (Hetero)arylboronic acid with fluorothioacetates at ambient temperature
作者:Xing Yi、Ya-Fang Cao、Xing Wang、Hui Xu、Shu-Rong Ban、Hui-Xiong Dai
DOI:10.1016/j.tetlet.2020.151780
日期:2020.4
A palladium-catalyzed fluoroacylation of (hetero)aryl boronic acid with the fluorothioacetates is described at ambient temperature. A variety of aryl, and heteroaryl boronic acids are compatible in the reaction, affording the corresponding fluoroalkyl ketones in moderate to good yields. Further late-stage di-, and trifluoroacylation of drug molecule clofibrate and estrone demonstrated the synthetic practicability of this protocol.2009 Elsevier Ltd. All rights reserved. (C) 2020 Elsevier Ltd. All rights reserved.