130900-95-7Relevant academic research and scientific papers
A Palladium-Catalyzed Oxa-(4+4)-Cycloaddition Strategy towards Oxazocine Scaffolds
Scuiller, Ana?s,Liu, Xueyang,Cordier, Marie,Garrec, Julian,Archambeau, Alexis
supporting information, p. 981 - 986 (2021/06/02)
A Pd-catalyzed oxa-(4+4)-cycloaddition between 1-azadienes and (2-hydroxymethyl)allyl carbonates is described. Aurone-derived azadienes furnished polycyclic 1,5-oxazocines in good yields. Interestingly, linear azadienes have also been involved and yielded monocyclic heterocycles with complete regioselectivity. DFT calculations were carried out to gain insight on this observation.
A novel cyclization/oxidation strategy for a two-step synthesis of (Z)-aurone
Li, Siyuan,Jin, Feng,Viji, Mayavan,Jo, Hyeju,Sim, Jaeuk,Kim, Hak Sung,Lee, Heesoon,Jung, Jae-Kyung
supporting information, p. 1417 - 1420 (2017/03/17)
An efficient and facile two-step strategy for the synthesis of (Z)-aurone from arylacetylenes and salicyladehydes, via silver(I) nitrate mediated cyclization/oxidation in the presence of potassium carbonate has been developed. The key feature of our metho
Preparative and Regiochemical Aspects of the Palladium-Catalyzed Carbonylative Coupling of 2-Hydroxyaryl Iodides with Ethynylarenes
Ciattini, Pier Giuseppe,Morera, Enrico,Ortar, Giorgio,Rossi, Sabina Strano
, p. 6449 - 6456 (2007/10/02)
The title reaction has been conveniently carried out in DMF at 60 deg C under 1 atm CO pressure using DBU as the base and Pd(OAc)2(DPPF)2 as the catalyst to afford generally mixtures of flavones 4 and aurones 5 in varying yields, depending on the substituents in the both reactants.Factors controlling the regioselectivity for 4 or 5 formation in this and in similar, previously reported, coupling procedures have been examined.
O-Heterocycles by the Cyclization of Side-Chain Bromomethoxylated 2'-Acetoxychalcones
Donnelly, John A.,Higginbotham, Clement L.
, p. 83 - 87 (2007/10/02)
The title chalcone derivatives react with aqueous sodium hydroxide of various concentrations to form aurones as the major product, together with small amounts of flavones.However, the introduction of 4'-nitro or 4'-chloro substituents resulted in the formation of flavones as the major product.
