1228050-55-2Relevant academic research and scientific papers
Synthesis and characterization of amino glucose-functionalized silica-coated NiFe2O4 nanoparticles: A heterogeneous, new and magnetically separable catalyst for the solvent-free synthesis of pyrano[3,2-: C] chromen-5(4 H)-ones
Fekri, Leila Zare,Nikpassand, Mohammad,Pourmirzajani, Sakineh,Aghazadeh, Behnaz
, p. 22313 - 22320 (2018/06/29)
A novel, efficient and one-pot multi-component procedure for the synthesis of simple pyrano[3,2-c]chromen-5(4H)-ones or pyrazolyl pyrano[3,2-c]chromen-5(4H)-ones via reaction of aryl aldehydes, acetophenones and 4-hydroxycoumarin promoted by amino glucose
Regioselective Access to Structurally Diverse Coumarin Analogues through Iron-Catalysed Annulation Reactions
Ren, Qiao,Kang, Jie,Li, Muyao,Yuan, Lujiang,Chen, Ruoyun,Wang, Lei
supporting information, p. 5566 - 5571 (2017/10/13)
A highly efficient iron-catalysed propargylation/alkyne oxacyclization/isomerization strategy is described. Biologically active furo[3,2-c]coumarins and pyrano[3,2-c]coumarins are expeditiously assembled in moderate to good yields and with a broad substrate scope. The regioselective access to different coumarins is mainly dependent on the terminal group of the secondary propargylic alcohol.
Br?nsted acidic ionic liquid-catalyzed tandem reaction: An efficient approach towards regioselective synthesis of pyrano[3,2-: C] coumarins under solvent-free conditions bearing lower E-factors
Mahato, Sachinta,Santra, Sougata,Chatterjee, Rana,Zyryanov, Grigory V.,Hajra, Alakananda,Majee, Adinath
, p. 3282 - 3295 (2017/07/28)
1-Butane sulfonic acid-3-methylimidazolium tosylate, [BSMIM]OTs, is found to be a remarkable catalyst for the tandem cyclization of 4-hydroxycoumarin with chalcones for the syntheses of pyrano[3,2-c]coumarins under solvent-free conditions. The developed p
Efficient route to highly functionalized chalcone-based pyranocoumarins via iodine-promoted michael addition followed by cyclization of 4-hydroxycoumarins
Ahmed, Naseem,Babu, B. Venkata
, p. 3044 - 3053 (2013/09/12)
Molecular iodine is used as an efficient promoter in the regioselective synthesis of highly functionalized chalcone-based pyranocoumarin derivatives using 4-hydroxycoumarin in acetic acid solvent at 100 °C. Under optimized reaction conditions, our protoco
Bi(OTf)3-catalyzed solvent-free synthesis of pyrano[3,2-c]coumarins through a tandem addition/annulation reaction between chalcones and 4-hydroxycoumarins
Gohain, Mukut,Van Tonder, Johannes H.,Bezuidenhoudt, Barend C.B.
, p. 3773 - 3776 (2013/07/11)
A Bi(OTf)3-catalyzed tandem addition/annulation reaction is described in order to synthesize pyrano[3,2-c]coumarins under solvent-free conditions. Substituted/unsubstituted chalcones were conveniently condensed with various 4-hydroxycoumarins b
DDQ-mediated tandem synthesis of functionalized pyranocoumarins from 4-hydroxycoumarins and 1,3-diarylallylic compounds
He, Zhenxing,Lin, Xufeng,Zhu, Yuanxun,Wang, Yanguang
experimental part, p. 965 - 976 (2010/10/02)
A simple and efficient DDQ-mediated oxidative cross-coupling between 4-hydroxycoumarin and 1,3-diarylallylic compounds was developed. The reaction furnished functionalized pyranocoumarins in a single step without using any metal catalyst. The tandem process involves an intermolecular C-C bond formation and an intramolecular C-O bond formation through double oxidative C-H activation.
