描述了在良性反应条件下进行的AB(C 6 F 5)3 H 2 O催化的叔脂肪族氟化物的脱氟官能化。通过快速有效地形成一系列具有新安装的C(sp 3)N,S,C和O键的产品,可以举例说明该方法的综合用途。这项研究说明了其他惰性原料的广泛反应性,并提供了通往有价值的和合成上代表性不足的产品的途径,这些产品以前从未从此类氟化前体中获得。
Discovery of 4-<i>tert</i>-Butyl-2,6-dimethylphenylsulfur Trifluoride as a Deoxofluorinating Agent with High Thermal Stability as Well as Unusual Resistance to Aqueous Hydrolysis, and Its Diverse Fluorination Capabilities Including Deoxofluoro-Arylsulfinylation with High Stereoselectivity
作者:Teruo Umemoto、Rajendra P. Singh、Yong Xu、Norimichi Saito
DOI:10.1021/ja106343h
日期:2010.12.29
groups to CF(3) groups, in high yields. 1k also converts C(=S) and CH(3)SC(=S)O groups to CF(2) and CF(3)O groups, respectively, in high yields. In addition, 1k effects highly stereoselective deoxofluoro-arylsulfinylation of diols and amino alcohols to give fluoroalkyl arylsulfinates and arylsulfinamides, with complete inversion of configuration at fluorine and the simultaneous, selective formation of
Mechanistic Study of Silver-Catalyzed Decarboxylative Fluorination
作者:Niki R. Patel、Robert A. Flowers
DOI:10.1021/acs.joc.5b00826
日期:2015.6.5
components and ligates to Ag(I) under the reaction conditions. The use of donor ligands on Ag(I) provides evidence of oxidation to Ag(II) by Selectfluor. The use of sodium persulfate as an additive in the reaction as well as NFSI as a fluorine source further supports the generation of a Ag(II) intermediate; this data will enable the development of a more efficient set of reaction conditions for the fluorination
Autocatalytic Friedel–Crafts Reactions of Tertiary Aliphatic Fluorides Initiated by B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub>·H<sub>2</sub>O
作者:Marian Dryzhakov、Joseph Moran
DOI:10.1021/acscatal.6b00866
日期:2016.6.3
presence of other functional groups. Existing methods for the activation of tertiary aliphaticfluorides involve stoichiometric abstraction with fluorophilic Lewis acids or by Lewis-acid-catalyzed trapping with Si reagents. Herein, we describe a B(C6F5)3·H2O-catalyzed Friedel–Crafts reaction of tertiary alkyl fluorides that proceeds rapidly at room temperature without trapping reagents. The method is
C–F键是与碳最强的单键,构成存在其他官能团时选择性催化活化的固有挑战。现有的用于活化叔脂肪族氟化物的方法包括用亲氟路易斯酸或通过路易斯酸催化的硅试剂捕集的化学计量萃取。本文中,我们描述了叔烷基氟的B(C 6 F 5)3 ·H 2 O催化的Friedel-Crafts反应,该反应在室温下快速进行而没有捕获试剂。该方法适用于F完全选择性-在传统上更好的离去基团和显示器的自催化动力学特征。
Catalytic formation of C(sp<sup>3</sup>)–F bonds via decarboxylative fluorination with mechanochemically-prepared Ag<sub>2</sub>O/TiO<sub>2</sub> heterogeneous catalysts
作者:G. Tarantino、L. Botti、N. Dimitratos、C. Hammond
DOI:10.1039/c7ra06180c
日期:——
and re-use, the turnover numbers obtained over the solid catalyst are over one order of magnitude higher than those obtained with the state-of-the-art homogeneous catalyst, AgNO3, under otherwise identical conditions. To the best of our knowledge, this represents the first true heterogeneous catalyst for the selective formation of C(sp3)–F bonds with electrophilic fluorine donors, representing a major