Access to
N
−CF
3
Formamides by Reduction of
N
−CF
3
Carbamoyl Fluorides
摘要:
AbstractThe departure into unknown chemical space is essential for the discovery of new properties and function. We herein report the first synthetic access to N‐trifluoromethylated formamides. The method involves the reduction of bench‐stable NCF3 carbamoyl fluorides and is characterized by operational simplicity and mildness, tolerating a broad range of functional groups as well as stereocenters. The newly made N−CF3 formamide motif proved to be highly robust and compatible with diverse chemical transformations, underscoring its potential as building block in complex functional molecules.
Facile Access to AgOCF<sub>3</sub>and Its New Applications as a Reservoir for OCF<sub>2</sub>for the Direct Synthesis of N−CF<sub>3</sub>, Aryl or Alkyl Carbamoyl Fluorides
showcase its performance in trifluoromethoxylations or as reservoir for O=CF2. This enabled the direct, practical and safe synthesis of valuable N‐alkyl/aryl and N−CF3 carbamoyl fluorides from secondary amines and isothiocyanides, respectively. Our mechanistic data indicate that AgOCF3 does not liberate O=CF2 until it is activated by a nucleophilic co‐reagent, reinforcing the stability of the salt under
Analytical process and means for measuring protease inhibitor capacity
申请人:Battelle Memorial Institute
公开号:US04607010A1
公开(公告)日:1986-08-19
An analyte sample of blood serum is reacted with a protease in excess over that quantity required to provide a 1:1 protease:inhibitor complex. The excedent protease is then back-titrated using the reaction with diphenylcarbamyl fluoride and measuring electrometrically the liberated fluoride.
Fluoride-Catalyzed Cross-Coupling of Carbamoyl Fluorides and Alkynylsilanes
作者:Dusty Cadwallader、Dmytro Shevchuk、Tristan R. Tiburcio、Christine M. Le
DOI:10.1021/acs.orglett.3c02871
日期:2023.10.13
We report the synthesis of alkynamides via the cross-coupling of carbamoyl fluorides and alkynylsilanes catalyzed by tetrabutylammonium fluoride (TBAF). In contrast to previously reported transformations of carbamoyl fluorides, C–F bond cleavage is achieved under exceptionally mild conditions (room temperature, low catalyst loadings, and short reaction times) without the need for strongly nucleophilic
N,N-Diarylcarbamoyl-fluoride, Verfahren zu ihrer Herstellung, sowie ihre Verwendung zur Herstellung von Harnstoffen und die dabei erhaltenen Harnstoffe
申请人:BAYER AG
公开号:EP0052842A2
公开(公告)日:1982-06-02
Neue N,N-Diarylcarbamoyl-fluoride können hergestellt werden, indem man in einer ersten Stufe N,N-Diarylamine mit Phosgen zu dem entsprechenden N,N-Diarylcarbamoyl- chlorid umsetzt, und dieses in einer zweiten Stufe fluoriert. Die N,N-Diarylcarbamoyl-fluoride können für die Herstellung . von Harnstoffen verwendet werden.