Silver-Mediated Decarboxylative Fluorodiiodination of Alkynoic Acids: Synthesis of Regio- and Stereoselective Fluoroalkenes
摘要:
A variety of arylalkynoic acids reacted with 1,3-diiodo-5,5-dimethylhydantoin and HF.pyridine in the presence of AgOAc to provide the corresponding 1-fluoro-2,2-diiodovinylarenes in good yields and high regioselectivity. In addition, Pd-catalyzed cross-coupling reaction of 1-fluoro-2,2-diiodovinylarenes afforded diaryl coupling products in the Suzuki reaction and monoaryl coupling products with high stereo-selectivity in the Hiyama reaction. It was found that C-F-activated borylation of fluoroalkenes using Pd catalyst afforded the vinylboranes with good yields.
Nickel-Mediated Oxidative Fluorination for PET with Aqueous [<sup>18</sup>F] Fluoride
作者:Eunsung Lee、Jacob M. Hooker、Tobias Ritter
DOI:10.1021/ja3084797
日期:2012.10.24
A one-step oxidativefluorination for carbon-fluorine bond formation from well-defined nickel complexes with oxidant and aqueous fluoride is presented, which enables a straightforward and practical (18)F late-stage fluorination of complex small molecules with potential for PET imaging.
The anion derived from diethyl α-fluorobenzyl phosphonate (EtO)2P(O)-CFHPh (2) and lithium diisopropylamide in THF underwent the reaction with aldehydes and ketones to afford a moderate to good yields of phenyl substituted fluoro-olefins RR′C=CFPh (6).
Photochemical selective fluorination of organic molecules using mercury (II) fluoride
作者:Mohammed H. Habibi、Thomas E. Mallouk
DOI:10.1016/s0022-1139(00)80299-7
日期:1991.2
Organic compounds, such as triphenylacetic acid, triphenyl ethylene, and triethyl phosphite can be selectively fluorinated in dimethylsulfoxide/ HgF2 solutions under UV-visible illumination. Product yields, determined by 19F-NMR, are essentially quantitative for the compounds studied, and in some cases only a single fluorinated product is formed.
The present invention provides novel nickel complexes. These complexes are in providing fluorinating organic compounds. The invention is particularly useful for fluorinating compounds with
18
F for PET imaging.
Self‐Sustaining Fluorination of Active Methylene Compounds and High‐Yielding Fluorination of Highly Basic Aryl and Alkenyl Lithium Species with a Sterically Hindered
<i>N</i>
‐Fluorosulfonamide Reagent
作者:Yuhao Yang、Gerald B. Hammond、Teruo Umemoto
DOI:10.1002/anie.202211688
日期:2022.10.24
By developing a sterically hindered fluorinating agent, N-fluoro-N-(tert-butyl)-tert-butanesulfonamide (NFBB), we discovered a conceptually novel base-catalyzed, self-sustaining fluorination of active methylene compounds and achieved an unprecedented high-yield fluorination of highly basic (hetero)aryl and alkenyl lithium species.