We describe a novel reagent system to obtain acyl fluorides directly from three different functional group precursors: carboxylic acids, aldehydes, or alcohols. The transformation is achieved via a combination of trichloroisocyanuric acid and cesium fluoride, which facilitates the synthesis of various acyl fluorides in high yield (up to 99%). It can be applied to the late-stage functionalization of
Synthesis of acyl fluorides <i>via</i> photocatalytic fluorination of aldehydic C–H bonds
作者:Michael Meanwell、Johannes Lehmann、Marc Eichenberger、Rainer E. Martin、Robert Britton
DOI:10.1039/c8cc06375c
日期:——
demonstrate that acyl fluorides can be prepared directly from aldehydes via a C(sp2)–H fluorinationreaction involving the inexpensive photocatalyst sodium decatungstate and electrophilic fluorinating agent N-fluorobenzenesulfonimide. This convenient fluorination strategy enables direct conversion of aliphatic and aromatic aldehydes into acylating agents.
Carbon-chain isomerization during the electrochemical fluorination in anhydrous hydrogen fluoride—a mechanistic study
作者:Nikolai V. Ignat’ev、Urs Welz-Biermann、Udo Heider、Andriy Kucheryna、Stefan von Ahsen、Wolfgang Habel、Peter Sartori、Helge Willner
DOI:10.1016/s0022-1139(03)00174-x
日期:2003.11
i-C3H7SO2F and cyclo-C3H7C(O)F have been subjected to electrochemical fluorination in anhydrous hydrogenfluoride. The resulting products were fully analyzed by NMR spectroscopy. From the reaction balances, literature data and quantum chemical calculations, a new mechanism for carbon-chain isomerization during the electrochemical fluorination (ECF) is proposed. The key step in the formation of isomeric products
化合物i -C 4 H 9 SO 2 F,i -C 3 H 7 SO 2 F和环-C 3 H 7 C(O)F已在无水氟化氢中进行了电化学氟化。通过NMR光谱对所得产物进行全面分析。从反应平衡,文献数据和量子化学计算出发,提出了一种在电化学氟化过程中碳链异构化的新机理。据信形成异构体产物的关键步骤是涉及碳阳离子或双自由基中间体的闭环反应。
Versatile Palladium-Catalyzed Approach to Acyl Fluorides and Carbonylations by Combining Visible Light- and Ligand-Driven Operations
作者:Yi Liu、Cuihan Zhou、Meijing Jiang、Bruce A. Arndtsen
DOI:10.1021/jacs.2c01951
日期:2022.6.1
We describe the development of a general palladium-catalyzed carbonylative method to synthesize acyl fluorides from aryl, heteroaryl, alkyl, and functionalized organic halides. Mechanistic analysis suggests that the reaction proceeds via the synergistic combination of visible light photoexcitation of Pd(0) to induce oxidative addition with a ligand-favored reductive elimination. These together create