O-Fluoromethyl carboxylates and O-fluoromethyl carbamates
作者:Manfred Schlosser、Dominique Limat
DOI:10.1016/0040-4020(95)00251-3
日期:1995.5
The fluoride catalyzed reaction between acyl fluorides and monomeric formaldehyde affords fluoromethyl carboxylates in acceptable yields. - Fluoromethyl fluoroformate, readily accessible from the corresponding dichloro compound, condenses with amines to give fluoromethyl carbamates.
Gram-Scale Preparation of Acyl Fluorides and Their Reactions with Hindered Nucleophiles
作者:Michał Barbasiewicz、Michał Tryniszewski
DOI:10.1055/a-1649-5460
日期:2022.3
A series of acyl fluorides was synthesized at 100 mmol scale using phase-transfer-catalyzed halogen exchange between acyl chlorides and aqueous bifluoride solution. The convenient procedure consists of vigorous stirring of the biphasic mixture at room temperature, followed by extraction and distillation. Isolated acyl fluorides (usually 7–20 g) display excellent purity and can be transformed into sterically
A Convenient, One-Pot Procedure for the Preparation of Acyl and Sulfonyl Fluorides Using Cl3CCN, Ph3P, and TBAF(t-BuOH)4
作者:Doo Jang、Joong-Gon Kim
DOI:10.1055/s-0030-1259051
日期:2010.12
Various carboxylic acids were converted into acyl fluorides in excellent yields by treatment with trichloroacetonitrile, triphenylphosphine, and TBAF(t-BuOH) 4 at room temperature. The reaction was applicable to the preparation of acid-sensitive amino acid fluorides without deprotection or rearrangement.
Methods for directfunctionalization of C–H bonds mediated by N-oxyl radicals constitute a powerful tool in modern organic synthesis. While several N-oxyl radicals have been developed to date, the lack of structural diversity for these species has hampered further progress in this field. Here we designed a novel class of N-oxyl radicals based on N-hydroxybenzimidazole, and applied them to the direct C–H functionalization
Synthesis of Acyl Fluorides from Carboxylic Acids Using NaF-Assisted Deoxofluorination with XtalFluor-E
作者:Marie Gonay、Chloé Batisse、Jean-François Paquin
DOI:10.1021/acs.joc.0c01377
日期:2020.8.7
The synthesis of acyl fluorides using the deoxofluorination reaction of carboxylicacids using XtalFluor-E is described. This transformation, assisted by a catalytic amount of NaF, occurs at roomtemperature in EtOAc, where XtalFluor-E behaves as the activating agent and the fluoride source. A wide range of acyl fluorides were obtained in moderate to excellent yields (36–99%) after a simple filtration