Abstract Reactions of trifluoromethane- and tridecafluorohexanesulfonyl chlorides with silyl enol ethers have been investigated in the presence of a ruthenium(II) phosphine complex. Perfluoroalkylation and chlorination occurred depending on the substituent of silyl enol ether; i.e. perfluoroalkylated compound was selectively obtained in the reactions with silyl enol ether possessing an electron-withdrawing
摘要 在钌 (II) 膦配合物存在下,研究了三氟甲烷和十三氟己烷磺酰氯与甲硅烷基烯醇醚的反应。全氟烷基化和氯化反应的发生取决于甲硅烷基烯醇醚的取代基;即与具有吸电子基团的甲硅烷基烯醇醚反应选择性地得到全氟烷基化化合物,而与具有给电子基团的甲硅烷基烯醇醚反应选择性地生成氯化物。
Triethylborane induced perfluoroalkylation of silyl enol ethers or germyl enol ethers with perfluoroalkyl iodides
Reaction of perfluoroalkyl iodides with silyl enol ethers mediated by Et3B in the presence of a base provides perfluoroalkylated silyl enol ethers. Meanwhile, treatment of germyl enol ethers with perfluoroalkyl iodides affords β-perfluoroalkyl ketones in good yields.
Electrochemical Synthesis of Fluorinated Ketones from Enol Acetates and Sodium Perfluoroalkyl Sulfinates
作者:Vera A. Vil’、Valentina M. Merkulova、Alexey I. Ilovaisky、Stanislav A. Paveliev、Gennady I. Nikishin、Alexander O. Terent’ev
DOI:10.1021/acs.orglett.1c01643
日期:2021.7.2
fluorinated ketones fromenolacetates and RfSO2Na in an undivided cell under constant current conditions was developed. The electrosynthesis proceeded via perfluoroalkyl radical generation from sodium perfluoroalkyl sulfinate followed by addition to the enolacetate and transformation of the resulting C radical to a fluorinated ketone. The method is applicable to a wide range of enolacetates and results
开发了在恒流条件下在未分隔的电池中由烯醇乙酸酯和 R f SO 2 Na电化学合成氟化酮。电合成通过从全氟烷基亚磺酸钠产生全氟烷基自由基,然后加入烯醇乙酸酯并将所得 C 自由基转化为氟化酮来进行。该方法适用于范围广泛的烯醇乙酸酯,并以 20% 至 85% 的产率获得所需的产品。
Zn-mediated rhodium-catalyzed α-trifluoromethylation of ketones via silyl enol ethers
The treatment of silylenolethers of ketones with CF3–I and Et2Zn in the presence of RhCl(PPh3)3 in DME gave α-trifluoromethyl ketones in good yields. The reaction can be widely applicable to silylenolethers derived from aliphatic or aromatic ketones. In the absence of the rhodium catalyst, the reaction was very slow and the yields were quite poor.