33524-67-3Relevant academic research and scientific papers
Catalytic [3+3] Annulation of β-Ketoethers and Cyclopropenones via C(sp3)—O/C—C Bond Cleavage under Transition-Metal Free Conditions
Bai, Dachang,Chen, Junyan,Zheng, Bingbing,Li, Xueyan,Chang, Junbiao
supporting information, p. 2769 - 2773 (2021/08/09)
The efficient cleavage of carbon-oxygen (C—O) bond is highly important for the transformation of oxygen-rich biomass and industry chemicals. Herein, an efficient [3+3] annulation of β-ketoethers with cyclopropenones in the presence of catalytic base has b
Regioselective Synthesis of 5-Metalated 2-Pyrones by Intramolecular Oxymetalation of Carbonyl-ene-yne Compounds Using Indium Trihalide
Yata, Tetsuji,Kita, Yuji,Nishimoto, Yoshihiro,Yasuda, Makoto
, p. 14330 - 14341 (2019/11/03)
The oxyindation of carbonyl-ene-yne compounds with indium trihalides proceeded efficiently to give di-, tri-, and tetrasubstituted 2-pyrones bearing a carbon-indium bond. The metalated 2-pyrone and a zwitterion intermediate were identified by X-ray crystallographic analysis. The application of organoindium compounds to oxidation or cross-coupling provided easy access to various multifunctionalized 2-pyrones. Some 2-pyrone derivatives show intense fluorescence only in the solid state (aggregation-induced emission).
Ruthenium-catalyzed decarbonylative addition reaction of anhydrides with alkynes: A facile synthesis of isocoumarins and α-pyrones
Prakash, Rashmi,Shekarrao, Kommuri,Gogoi, Sanjib,Boruah, Romesh C.
supporting information, p. 9972 - 9974 (2015/06/22)
A novel ruthenium catalyzed straightforward and efficient synthesis of isocoumarin and α-pyrone derivatives has been accomplished by the decarbonylative addition reaction of anhydrides with alkynes under thermal conditions.
Rhodium(III)-catalysed decarbonylative coupling of maleic anhydrides with alkynes
Matsuda, Takanori,Suzuki, Kentaro
, p. 37138 - 37141 (2014/11/08)
A formal [5 - 1 + 2] annulation for the preparation of substituted α-pyrones is reported. The reaction involves the decarbonylative coupling of substituted maleic anhydrides with internal alkynes in the presence of a rhodium(III) catalyst and a copper(II)
Synthesis of functionalized α-pyrone and butenolide derivatives by rhodium-catalyzed oxidative coupling of substituted acrylic acids with alkynes and alkenes
Mochida, Satoshi,Hirano, Koji,Satoh, Tetsuya,Miura, Masahiro
experimental part, p. 6295 - 6298 (2009/12/08)
(Chemical Equation Presented) The straightforward and efficient synthesis of α-pyrone and butenolide derivatives has been achieved by the rhodium-catalyzed oxidative coupling reactions of substituted acrylic acids with alkynes and alkenes, respectively. Some α-pyrones obtained exhibit solid-state fluorescence.
Cycloaddition of benzo[b]thiophene-S,S-dioxide - A route to substituted dibenzothiophenes and dibenzothiophene S,S-dioxides
Iniesta, Jesus,Matsumoto, Taisuke,Thiemann, Thies
experimental part, p. 109 - 114 (2009/08/07)
Benzo[b]thiophene S,S-dioxide can be transformed by cycloaddition with tetraarylthiophene S-oxides to tetraaryldibenzothiophene S,S-dioxides. An analogous cycloaddition of benzo[b]thiophene S,S-dioxide, albeit at higher temperatures, leads directly to tet
Thermal oxidation of tetracyclones (2,3,4,5-tetraarylcyclopentadienones)
Thiemann, Thies,Iniesta, Jesus,Walton, David J.
experimental part, p. 173 - 180 (2009/05/07)
Tetracyclones are transformed to a mixture of diacylstilbenes and a-pyrones, when they are heated in diphenylether saturated with oxygen.
Synthesis of isocoumarins and α-pyrones via palladium-catalyzed annulation of internal alkynes
Larock, Richard C.,Doty, Mark J.,Han, Xiaojun
, p. 8770 - 8779 (2007/10/03)
A number of 3,4-disubstituted isocoumarins and polysubstituted α- pyrones have been prepared in good yields by treating halogen- or triflate- containing aromatic and α,β-unsaturated esters, respectively, with internal alkynes in the presence of a palladiu
CATALYTIC OXIDATION OF DIENONES WITH TPPMn(III)Cl-PhIO SYSTEM
Takata, Toshikazu,Tajima, Rieko,Ando, Wataru
, p. 665 - 668 (2007/10/02)
Several dienones were oxidized with iodosylbenzene (PhIO) in the presence of catalytic amount of tetraphenylporphinatomanganese(III) chloride (TPPMn(III)Cl), affording corresponding epoxides and pyrons.
