[EN] SYSTEM PROVIDING CONTROLLED DELIVERY OF GASEOUS CO FOR CARBONYLATION REACTIONS<br/>[FR] SYSTÈME PERMETTANT LA LIBÉRATION CONTRÔLÉE DE CO GAZEUX POUR RÉACTIONS DE CARBONYLATION
申请人:UNIV AARHUS
公开号:WO2012079583A1
公开(公告)日:2012-06-21
A carbonylation system comprising at least one carbon monoxide producing chamber and at least one carbon monoxide consuming chamber forming an interconnected multi-chamber system, said interconnection allowing carbon monoxide to pass from the at least one carbon monoxide producing chamber to the at least one carbon monoxide consuming chamber, said at least one carbon monoxide producing chamber containing a reaction mixture comprising a carbon monoxide precursor and a catalyst, said at least one carbon monoxide consuming chamber being suitable for carbonylation reactions, said interconnected multi- chamber system being sealable from the surrounding atmosphere during carbonylation.
Silylcarboxylic Acids as Bifunctional Reagents: Application in Palladium‐Catalyzed External‐CO‐Free Carbonylative Cross‐Coupling Reactions
作者:Xiong Li、Jie Xu、Yue Li、Søren Kramer、Troels Skrydstrup、Zhong Lian
DOI:10.1002/adsc.202000586
日期:2020.10.6
palladium‐catalyzed external‐CO‐free carbonylative Hiyama‐Denmark cross‐couplingreaction is presented. The introduction of silylcarboxylic acids as bifunctionalreagents (CO and nucleophile source) avoids the need for external gaseous CO and a silylarene coupling partner. The transformation features high functional group tolerance and it is successful with electron‐rich, ‐neutral, and ‐poor aryl iodides. Stoichiometric
Synthesis of Aryl Silacarboxylates via Palladium-Catalyzed C–O Bond Formation of Silacarboxylic Acids and Aryl Iodides
作者:Jin-Yan Liang、Shou-Jie Shen、Xiao-Hu Xu、Yun-Long Fu
DOI:10.1021/acs.orglett.8b02464
日期:2018.11.2
palladium-catalyzed C–O bond formation method for the synthesis of silacarboxylates by silacarboxylic acids with a broad range of aryl iodides and iodo-N-heterocycles is reported. Electron-deficient, electron-rich, and sterically hindered aryl iodides were well-tolerated to furnish the corresponding aryl silacarboxylates in moderate to excellent yields. Active functional groups, such as −NH2, −CHO, and allyl–, showed
in good‐to‐high yields with broad functional‐group compatibility. This reaction proceeds in the presence of water, enabling efficient deuterosilylation of alkenes with D2O as the deuterium source. Germyl radicals were similarly obtained.
Photoredox Defluorinative Silylation of α-Trifluoromethyl Arylalkenes Using Silacarboxylic Acids as Silyl Radical Precursors
作者:Zhichao Jin、Shichao Ren、Yi Zhang、Guihua Nie
DOI:10.1055/a-2122-8406
日期:2024.2
A photoredox defluorinative silylation of α-trifluoromethyl arylalkenes for rapid access to useful gem-difluoroalkenes is disclosed. Stable and easily prepared silacarboxylic acids are used as silyl radical precursors in a photocatalytic decarboxylative process. The mild conditions and operational simplicity make our method a straightforward strategy to construct gem-difluoroalkenes bearing various