TMSCF
<sub>3</sub>
as a Convenient Source of CF
<sub>2</sub>
=CF
<sub>2</sub>
for Pentafluoroethylation, (Aryloxy)tetrafluoroethylation, and Tetrafluoroethylation
作者:Lingchun Li、Chuanfa Ni、Qiqiang Xie、Mingyou Hu、Fei Wang、Jinbo Hu
DOI:10.1002/anie.201705734
日期:2017.8.7
A new method for the on-site preparation of tetrafluoroethylene (TFE) and a procedure for its efficient use in pentafluoroethylation by fluoride addition were developed by using a simple two-chamber system. The on-site preparation of TFE was accomplished by dimerization of difluorocarbene derived from (trifluoromethyl)trimethylsilane (TMSCF3) under mild conditions. Other fluoroalkylation reactions
pentafluoroethylation of aryl iodides using potassium (pentafluoroethyl)trimethoxyborate has been developed. The borate was found to be a convenient pentafluoroethyl source. In parallel, it was found that the solvent, as well as ligand, makes significant impact on the catalytic perfluoroalkylations. A method for the copper-catalyzed pentafluoroethylation of aryl iodides using potassium (pentafluoroethyl)trimethoxyborate
Cu<sup>I</sup>
-Catalyzed Pentafluoroethylation of Aryl Iodides in the Presence of Tetrafluoroethylene and Cesium Fluoride: Determining the Route to the Key Pentafluoroethyl Cu<sup>I</sup>
Intermediate
The Cu(I)‐catalyzed pentafluoroethylation of iodoarenes via the fluorocupration of tetrafluoroethylene (TFE) is disclosed. The active species, (phen)CuC2F5, was isolated and its molecular structure confirmed by a single‐crystal X‐ray diffraction analysis. The key to the successful suppression of the competing oligomerization of TFE is to refrain from stirring the reaction mixture. A mechanistic study
公开了通过四氟乙烯(TFE)的氟代杯化反应,由铜(I)催化的碘代芳烃的五氟乙基化。分离了活性物质(phen)CuC 2 F 5,并通过单晶X射线衍射分析确认了其分子结构。成功抑制TFE竞争性低聚的关键是避免搅拌反应混合物。机理研究清楚地放弃了催化反应通过自由基途径进行的可能性。
Benzenedisulfonamides as anthelmintic agents
申请人:Merck & Co., Inc.
公开号:US04001406A1
公开(公告)日:1977-01-04
Haloalkyl benzenedisulfonamides are employed in the treatment of both mature and immature liver fluke infections. They are orally or parenterally administered to host animals in suitable compositions.
[EN] PERFLUOROALKANE SUBSTITUTED PYRAZOLO[3,4-D]PYRIMIDIN AND PYRROLO[2,3-D]PYRIMIDIN COMPOUNDS AND USES THEREOF<br/>[FR] COMPOSÉS DE PYRAZOLO[3,4-D]PYRIMIDINE ET DE PYRROLO[2,3-D]PYRIMIDINE SUBSTITUÉS PAR UN PERFLUOROALCANE ET LEURS UTILISATIONS
申请人:ICAHN SCHOOL MED MOUNT SINAI
公开号:WO2022261352A1
公开(公告)日:2022-12-15
The present disclosure relates to compounds of formula (I) having the following structure: and to compounds of formula (II) having the structure: or stereoisomers, pharmaceutically acceptable salts, oxides, or solvates thereof, where R1, R2, R3, R4, and R5are as described herein. The present disclosure also relates to compositions containing the compounds having the structure of formula (I) and/or formula (II), and treatment methods in a subject using the compounds and/or compositions.