[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.
Visible-light-induced decarboxylation/defluorosilylation protocol for synthesis of <i>gem</i>-difluoroalkenes
作者:Pan Gao、Liping Cui、Guodong Zhang、Feng Chen
DOI:10.1039/d2cy01703b
日期:——
A catalytic defluorosilylation is disclosed that provides concise, modular synthetic entries to gem-difluoroallylsilanes from trifluoromethylalkenes and silacarboxylic acids, which are easy-to-prepare and stable silyl radical precursors. It is enabled by photoredox catalysis and undergoes a unique decarboxylation followed by defluorosilylation without extra hydrogen atom transfer catalysis. This efficient