Nickel‐Catalyzed Decarbonylative Cycloaddition of Benzofuran‐2,3‐diones with Alkynes to Flavones
作者:Yu‐Yang Zhang、Han Li、Xiaoding Jiang、Chitreddy V Subba Reddy、Hao Liang、Yaqi Zhang、Rihui Cao、Raymond Wai‐Yin Sun、Man Kin Tse、Liqin Qiu
DOI:10.1002/adsc.202101241
日期:2022.2
the Nickel-catalyzed decarbonylative cycloaddition of benzofuran-2,3-diones with alkynes was established, and a variety of functional flavones were synthesized in 65–99% yields. Terminal alkynes with substituted phenyl groups and internal alkynes such as aryl acyl acetylenes and diphenylacetylenes are suitable for this reaction. The effects of bases on the reactions of different types of alkyne substrates
Ruthenium-Catalyzed Carbonylative Cycloaddition of α-Keto Lactones with Alkenes or Alkynes: The Participation of an Ester-Carbonyl Group in Cycloaddition Reactions as the Two-Atom Assembling Unit
reaction of benzofuran-2,3-dione derivatives 1 with CO and alkenes (or alkynes) results in a carbonylative [2+2+1] cycloaddition in which the ester-carbonyl group is incorporated into a two-atom assembling unit to give spirolactone derivatives 2. This reaction provides the first example of an ester-carbonyl group participating in a carbonylativecycloaddition reaction.
An efficient diastereoselective synthesis of spiro pyrido[2,1-b][1,3]oxazines via a novel pyridine-based three-component reaction
作者:Abbas Ali Esmaeili、Hamid Vesalipoor、Rahele Hosseinabadi、Alireza Fakhari Zavareh、Mohammad Ali Naseri、Ebrahim Ghiamati
DOI:10.1016/j.tetlet.2011.07.039
日期:2011.9
The zwitterions generated from pyridine and dialkyl acetylenedicarboxylate (DAAD) reacted with benzofuran-2,3-diones to form highly substituted spiro pyrido[2,1-b][1,3]oxazines in good to high yields without using a catalyst.
由吡啶和乙酰二羧酸二烷基酯(DAAD)生成的两性离子与苯并呋喃-2,3-二酮反应形成高取代的螺吡啶并[2,1- b ] [1,3]恶嗪,而无需使用催化剂。
A novel reaction of the ‘Huisgen zwitterion’ with benzofuran-2,3-diones: an efficient strategy for the synthesis of spirocyclic benzofuran-2-one derivatives
nitrogen-based nucleophile generated from azodicarboxylate and triphenylphosphine displayed good reactivity toward benzofuran-2,3-diones to generate a variety of spirocyclic benzofuran-2-one derivatives. The reactions accommodate a number of benzofuran-2,3-diones and different dialkylazodicarboxylates to give the enriched functionalized 3-spirooxadiazole benzofuran-2-ones with moderate to good yields (up