作者:Yusuke Takahira、Miao Chen、Yu Kawamata、Pavel Mykhailiuk、Hugh Nakamura、Byron K. Peters、Solomon H. Reisberg、Chao Li、Longrui Chen、Tamaki Hoshikawa、Tomoyuki Shibuguchi、Phil S. Baran
DOI:10.1055/s-0037-1611737
日期:2019.6
A simple and robust method for electrochemical alkyl C–H fluorination is presented. Using a simple nitrate additive, a widely available fluorine source (Selectfluor), and carbon-based electrodes, a wide variety of activated and unactivated C–H bonds are converted into their C–F congeners. The scalability of the reaction is also demonstrated with a 100 gram preparation of fluorovaline.
Rapid and scalable synthesis of fluoroketones <i>via</i> cerium-mediated C–C bond cleavage
作者:Yen-Chu Lu、Helen M. Jordan、Julian G. West
DOI:10.1039/d0cc08183c
日期:——
Ketones with remote fluorination are an important motif in the synthesis of bioactive molecules. Here we demonstrate that ceric ammonium nitrate (CAN) is able to produce this functionality under incredibly mild conditions and short reaction times (30 min) while eliminating the need for precious metals in previous methods. Importantly, this method allows the efficient synthesis of a wide variety of
Silver-Catalyzed Decarboxylative Fluorination of Aliphatic Carboxylic Acids in Aqueous Solution
作者:Feng Yin、Zhentao Wang、Zhaodong Li、Chaozhong Li
DOI:10.1021/ja3048255
日期:2012.6.27
industries, general and site-specific C(sp(3))-F bond formations are still a challenging task. We report here that with the catalysis of AgNO(3), various aliphaticcarboxylicacids undergo efficient decarboxylative fluorination with SELECTFLUOR(®) reagent in aqueous solution, leading to the synthesis of the corresponding alkyl fluorides in satisfactory yields under mild conditions. This radical fluorination
centered around ring-opening carbon–carbon bond cleavage/fluorination of strained cycloalkanols, either using precious silver catalysis or superstoichiometric ceric ammonium nitrate (CAN). Careful study of these methods has allowed us to design and develop a general Earth-abundant-element-catalyzed method for remotely fluorinated ketone synthesis via C–C bond cleavage. Critically, the use of manganese