<i>Z</i>-Selective Olefin Synthesis via Iron-Catalyzed Reductive Coupling of Alkyl Halides with Terminal Arylalkynes
作者:Chi Wai Cheung、Fedor E. Zhurkin、Xile Hu
DOI:10.1021/jacs.5b01784
日期:2015.4.22
Selective catalytic synthesis of Z-olefins has been challenging. Here we describe a method to produce 1,2-disubstituted olefins in high Z selectivity via reductive cross-coupling of alkylhalides with terminal arylalkynes. The method employs inexpensive and nontoxic catalyst (iron(II) bromide) and reductant (zinc). The substrate scope encompasses primary, secondary, and tertiaryalkylhalides, and
[EN] DISUBTITUTED AZETIDINES, PYRROLIDINES, PIPERIDINES AND AZEPANES AS INHIBITORS OF MONOAMINE OXIDASE B FOR THE TREATMENT OF NEURODEGENERATIVE DISEASES<br/>[FR] AZÉTIDINES, PYRROLIDINES, PIPÉRIDINES ET AZÉPANES DI-SUBSTITUÉS EN TANT QU'INHIBITEURS DE MONOAMINE OXYDASE B POUR LE TRAITEMENT DE MALADIES NEURODÉGÉNÉRATIVES
申请人:UNIV OF LJUBLJANA
公开号:WO2018055096A1
公开(公告)日:2018-03-29
This invention relates to new inhibitors of MAO-Bwith the general formula I, where substituents are described in patent description. Compounds can be in the form of pure enantiomers or as racemic mixtures, or in the form of pharmaceutically acceptable salts. The present invention relates to the use of these inhibitors for the alleviation of symptoms and treatment of acute and chronic neurological disorders, cognitive and neurodegenerative diseases.
A stereoselective, denitrative cross-coupling of β-nitrostyrenes with N-alkylpyridinium salts for the preparation of functionalized styrenes has been developed. The visible-light-induced reaction proceeds without any catalyst at ambient temperature. Broad in scope and tolerant to multiple functional groups, the moderately yielding transformation is orthogonal to several traditional metal-catalyzed
Palladium‐Catalyzed Decarboxylative Heck‐Type Coupling of Activated Aliphatic Carboxylic Acids Enabled by Visible Light
作者:Maximilian Koy、Frederik Sandfort、Adrian Tlahuext‐Aca、Linda Quach、Constantin G. Daniliuc、Frank Glorius
DOI:10.1002/chem.201800813
日期:2018.3.26
palladium‐catalyzed coupling reaction of N‐hydroxyphthalimide esters and styrenes to deliver exclusively (E)‐substituted olefins under irradiation with visible light is reported. This method tolerates N‐hydroxyphthalimide esters derived from primary, secondary, tertiary as well as benzylic carboxylic acids. Notably, Pd(PPh3)4 is employed as an inexpensive palladium source and no addition of base or classical
Tetrachlorophthalimides as Organocatalytic Acceptors for Electron Donor–Acceptor Complex Photoactivation
作者:Wei Zhou、Shuo Wu、Paolo Melchiorre
DOI:10.1021/jacs.2c03546
日期:2022.5.25
Excitation of photoactive electrondonor–acceptor (EDA) complexes is an effective way to generate radicals. Applications in a catalytic regime typically use catalytic donors. Herein, we report that readily available electron-poor tetrachlorophthalimides can act as effective organocatalytic acceptors to trigger the formation of EDA complexes with a variety of radical precursors not amenable to previous