Visible-Light-Mediated Alkylation of Thiophenols via Electron Donor–Acceptor Complexes Formed between Two Reactants
作者:Yi-Ping Cai、Fang-Yuan Nie、Qin-Hua Song
DOI:10.1021/acs.joc.1c01433
日期:2021.9.3
A metal-free, photocatalyst-free, photochemical system was developed for the direct alkylation of thiophenols via electrondonor–acceptor (EDA) complexes (KEDA = 145 M–1) between two reactants, N-hydroxyphthalimide esters as acceptors and thiophenol anions as donors, in the presence of a tertiary amine. The EDA complexes in the reaction system have a broad range of visible-light absorption (400–650
开发了一种无金属、无光催化剂的光化学系统,用于通过两种反应物之间的电子供体 - 受体 (EDA) 配合物 ( K EDA = 145 M –1 )直接烷基化苯硫酚,N-羟基邻苯二甲酰亚胺酯作为受体和苯硫酚阴离子作为供体,在叔胺的存在下。反应体系中的 EDA 配合物具有广泛的可见光吸收范围(400-650 nm),可以在阳光下有效触发反应。
Copper‐Catalyzed 1,2‐Trifluoromethylation Carbonylation of Unactivated Alkenes: Efficient Access to β‐Trifluoromethylated Aliphatic Carboxylic Acid Derivatives
作者:Fu‐Peng Wu、Yang Yuan、Xiao‐Feng Wu
DOI:10.1002/anie.202112609
日期:2021.12
A novelprocedure on carbonylative trifluoromethylation of unactivated alkenes has been developed. Catalyzed by a copper catalyst, carbonylative difunctionalization of alkenes with Togni-CF3 and nitrogen (or oxygen) nucleophiles occurred successfully. A variety of valuable β-trifluoromethyl amides, esters and acids were obtained in good yields under mild conditions. Ethylene gas can also be successfully
Copper-Catalyzed Synthesis of Stereodefined Cyclopropyl Bis(boronates) from Alkenes with CO as the C1 Source
作者:Fu-Peng Wu、Xiaoling Luo、Udo Radius、Todd B. Marder、Xiao-Feng Wu
DOI:10.1021/jacs.0c06800
日期:2020.8.19
A novel copper-catalyzed stereodefined procedure for the selective synthesis of cyclopropyl bis(boronates) from terminal alkenes has been developed. Various aliphatic alkenes were transformed into the desired bis(boronate ester)-substituted cyclopropanes in moderate to good yields. Synthetic transformations of the resulting cyclopropyl bis(boronates) demonstrate their utility. A possible reaction mechanism
multicomponent 1,2-perfluoroalkylation carbonylation of alkenes has been developed. This protocol allows the synthesis of β-perfluoroalkyl-substituted amides, esters, and related derivatives using olefins, carbon monoxide, commercially accessible perfluoroalkyl iodides, and a variety of nucleophiles including low nucleophilic amides and urea derivatives in a one-pot manner. As an example, readily available
Employing a photocatalyst system based on copper and BINAP, visible light-mediated perfluoroalkylative carbonylation of unactivated alkenes has been developed. The method enables a photo-promoted perfluoroalkyl radical addition-carbon monoxide insertion-coupling cascade approach to functionalized β-perfluoroalkyl carbonyl compounds. Various substrates, including alkenes, perfluoroalkyl halides, and