Copper-Catalyzed Radical Aminotrifluoromethylation of Alkenes
作者:Haiwen Xiao、Haigen Shen、Lin Zhu、Chaozhong Li
DOI:10.1021/jacs.9b06141
日期:2019.7.24
We report herein an unprecedented protocol for aminotrifluoromethylation of alkenes. With Cu(OTf)2 as the catalyst, the reaction of alkenes, (bpy)Zn(CF3)2 and N-fluorobis(benzenesulfonyl)imide (NFSI) at room temperature provides the corresponding aminotrifluoromethylation products in satisfactory yields with high regioselectivity opposite to those driven by CF3 radical addition. The method exhibits
Cobalt-Catalyzed Markovnikov-Selective Radical Hydroacylation of Unactivated Alkenes with Acylphosphonates
作者:Benxiang Zhang、Jiayan He、Yi Li、Tao Song、Yewen Fang、Chaozhong Li
DOI:10.1021/jacs.1c02629
日期:2021.4.7
Acylphosphonates having the 5,5-dimethyl-1,3,2-dioxophosphinanyl skeleton are developed as efficient intermolecular radical acylation reagents, which enable the cobalt-catalyzed Markovnikov hydroacylation of unactivatedalkenes at room temperature under mild conditions. The protocol exhibits broad substrate scope and wide functional group compatibility, providing branched ketones in satisfactory yields
Copper-Catalyzed Alkylation of Nitroalkanes with α-Bromonitriles: Synthesis of β-Cyanonitroalkanes
作者:Kirk W. Shimkin、Peter G. Gildner、Donald A. Watson
DOI:10.1021/acs.orglett.6b00093
日期:2016.3.4
Copper catalysis now enables the efficient C-alkylation of nitroalkanes with α-bromonitriles. Using a simple and inexpensive catalyst, this process provides access to β-cyanonitroalkanes. The method is highly tolerant of various functional groups and substitution patterns. These functionally dense products serve as orthogonally masked 1,3-diamines, which can be revealed selectively for access to differentially
A syntheticapproach to a new class of allyl nitro derivatives is reported. (2-Acetoxy)allyl nitro compounds have been prepared for the first time in a four-step procedure by a preliminary reaction of nitroalkanes with 2-(phenylselenyl)acetaldehyde. After the acetylation of the obtained nitro alcohols, the unsaturation is installed by an oxidation reaction involving the phenylselenyl group followed
Palladium-catalyzed intermolecular alkynylcarbonylation of unactivated alkenes: easy access to β-alkynylcarboxylic esters
作者:Xiang Li、Pinhong Chen、Guosheng Liu
DOI:10.1039/d1cc07092d
日期:——
A palladium-catalyzed intermolecular alkynylcarbonylation of unactivated alkenes has been established with ethynyl benziodoxolones (EBXs) as alkynylation reagents, providing β-alkynylcarboxylic esters efficiently from simple alkenes. The reaction features moderate to excellent regioselectivity and excellent functional group compatibility under mild reaction conditions.