Alkynes react with organoborons under a CO atmosphere in the presence of a rhodium(I) catalyst to afford mainly 5-aryl-2(5H)-furanones, α,β-unsaturated ketones, and indanones. The product selectivity can be tuned by modifying the reaction conditions.
through the activation of its formyl C–Hbond (decarbonylation) and the latter catalyzes the subsequent dual-incorporation of the resulting carbonyl unit (carbonylation). The use of larger amounts of the phosphine-ligated rhodium(I) complex generates more carbonyl units, leading to the formation γ-butenolides via the dual-incorporation of the carbonyl unit.
Rhodium-catalyzed carbonylative arylation of alkynes with arylboronic acids: an efficient and straightforward method in the synthesis of 5-aryl-2(5H)-furanones
5-Aryl-2(5H)-furanones can be synthesized by the Rh-catalyzed reactions of arylboronic acids with internal alkynes under a CO atmosphere.
5-芳基-2(5H)-呋喃酮可以通过在CO气氛下,使用Rh催化的芳基硼酸与内炔的反应合成。
10.1055/3-2008-1078047
作者:Ku̧, Melih、Artok, Özge Aksin、Ziyanak, Firat、Artok, Levent
DOI:10.1055/3-2008-1078047
日期:——
Intermolecular [2+2+1] Carbonylative Cycloaddition of Aldehydes with Alkynes, and Subsequent Oxidation to γ-Hydroxybutenolides by a Supported Ruthenium Catalyst
作者:Hiroki Miura、Kazuki Takeuchi、Tetsuya Shishido
DOI:10.1002/anie.201507814
日期:2016.1.4
Intermolecular [2+2+1] carbonylativecycloaddition of aldehydes with alkynes and subsequentoxidation to γ‐hydroxybutenolides is achieved using a supportedrutheniumcatalyst. A ceria‐supportedrutheniumcatalyst promotes the reaction efficiently, even with an ambient pressure of CO or without external CO, thus giving the corresponding γ‐hydroxybutenolide derivatives in good to high yields. Moreover