Synthesis of <sup>18</sup>F-difluoromethylarenes using aryl boronic acids, ethyl bromofluoroacetate and [<sup>18</sup>F]fluoride
作者:Jeroen B. I. Sap、Thomas C. Wilson、Choon Wee Kee、Natan J. W. Straathof、Christopher W. am Ende、Paramita Mukherjee、Lei Zhang、Christophe Genicot、Véronique Gouverneur
DOI:10.1039/c8sc05096a
日期:——
Herein, we report the radiosynthesis of 18F-difluoromethylarenes via the assembly of three components, a boron reagent, ethyl bromofluoroacetate, and cyclotron-produced non-carrier added [18F]fluoride. The two key steps are a copper-catalysed cross-coupling reaction, and a Mn-mediated 18F-fluorodecarboxylation.
Modus operandi: Catalytic access to the title compounds through a new asymmetric α‐arylation protocol is reported (see scheme). These products are formed in good yields and excellent enantioselectivities by using a new and easily synthesized chiral N‐heterocyclic carbene (NHC) ligand. Advanced DFT calculations reveal the properties of the NHC ligand and the mode of operation of the catalyst.
Methods and systems for selective fluorination of organic molecules
申请人:Fasan Rudi
公开号:US20090061471A1
公开(公告)日:2009-03-05
A method and system for selectively fluorinating organic molecules on a target site wherein the target site is activated and then fluorinated are shown together with a method and system for identifying a molecule having a biological activity.
METHODS AND SYSTEMS FOR SELECTIVE FLUORINATION OF ORGANIC MOLECULES
申请人:Fasan Rudi
公开号:US20090209010A1
公开(公告)日:2009-08-20
A method and system for selectively fluorinating organic molecules on a target site wherein the target site is activated and then fluorinated are shown together with a method and system for identifying a molecule having a biological activity.
A selective and mild electrochemical defluorinative carboxylation for late-stage C(sp<sup>3</sup>)–F bond functionalization
作者:Subhojit Mondal、Soumik Sarkar、Jason W. Wang、Michael W. Meanwell
DOI:10.1039/d3gc03387b
日期:——
defluorinative carboxylation of trifluoromethyl (hetero)arenes, and trifluoromethyl-acetates and -acetamides, for accessing their highly valuable α,α-difluorocarboxylic acid analogues. Given the immense synthetic versatility of carboxylic acids, our new protocol may become a useful tool for accessing novel fluorinated analogues in drug design and agrochemical development.