15938-69-9Relevant academic research and scientific papers
I2-promoted tandem cyclization to synthesize polysubstituted pyrano[3,2-c]chromene-2,5-diones
Cai, Qun,Zhuang, Shiyi,Yang, Mian,Peng, Na,Liu, Yi,Wu, Anxin
, (2019/11/28)
An efficient and convenient method for the synthesis of various substituted pyrano[3,2-c]chromene-2,5-diones was developed via the I2-promoted tandem cyclization of commercially available aryl methyl ketones and 4-hydroxycoumarins. Preliminary
A facile and practical p-toluenesulfonic acid catalyzed route to dicoumarols containing an aroyl group
Khodabakhshi, Saeed,Karami, Bahador,Eskandari, Khalil,Rashidi, Alimorad
, p. 53 - 56 (2015/03/04)
New and known dicoumarols may be efficiently synthesized employing p-toluenesulfonic acid (p-TSA) as a solid acid catalyst from the reaction of 4-hydroxycoumarin with aryl glyoxal in water. This method offers direct access to structurally diverse coumarin derivatives in moderate to good yields (up to 65%). A total of five new compounds were synthesized.
Graphene oxide nanosheets promoted regioselective and green synthesis of new dicoumarols
Khodabakhshi, Saeed,Karami, Bahador,Eskandari, Khalil,Hoseini, S. Jafar,Rashidi, Alimorad
, p. 17891 - 17895 (2014/05/06)
Graphene oxide (GO) was obtained by modified Hummers oxidation of graphite and used as a highly efficient, metal-free, non-oxidative, and recyclable catalyst to promote the condensation of 4-hydroxycoumarin and aryl glyoxals for synthesis of new dicoumarols. This method is completely in accord with green chemistry. This journal is the Partner Organisations 2014.
Synthesis of new and known dicoumarols in aqueous media: A green and convenient procedure promoted by titanium(4) oxide nanoparticles
Khodabakhshi, Saeed,Shahamirian, Mozhgan,Baghernejad, Mojtaba
, p. 596 - 600 (2014/07/21)
A simple and green method is reported for the completely chemoselective synthesis of some new dicoumarol derivatives {3,3′-(2-aryl-2- oxoethylidene)bis[4-hydroxycoumarin]s} from the reaction of 4-hydroxycoumarin with arylglyoxals in a molar ratio of 2:1 respectively. The reactions efficiently promoted by titanium(4) oxide nanoparticles as a heterogeneous catalyst via an on water process. Catalyst loading is very low and it shows recyclability.
Synthesis of aroyl[bis(4-hydroxycoumarin-3-yl)]methane using tungstate sulfuric acid in water
Khodabakhshi, Saeed,Karami, Bahador,Baghernejad, Mojtaba
, p. 356 - 357 (2014/07/08)
An efficient synthesis of some new aroyl[bis(4-hydroxycoumarin-3-yl)] methanes (dicoumarols) based on the reaction of 4-hydroxycoumarin with arylglyoxals is described. The reactions were efficiently catalysed by tungstate sulfuric acid to afford the produ
A novel method for one-pot synthesis of furo[3,2-c]coumarin derivatives from 4-hydroxycoumarin and arylglyoxal under microwave irradiation
Chen, Zhiwei,Bi, Jianhao,Su, Weike
, p. 1845 - 1850 (2012/10/29)
A novel one-pot synthesis of furo[3,2-c]coumarins has been developed from readily available starting materials 4-hydroxycoumarin and arylglyoxal. This method is simple, rapid and good yielding.
Aroyl[bis(4-hydroxycoumarin-3-yl)]methanes in reactions with 1,2-diaminobenzenes
Kolos,Gozalishvili,Yaremenko,Shishkin,Shishkina,Konovalova
, p. 2277 - 2283 (2008/09/20)
The reaction of aroyl[bis(4-hydroxycoumarin-3-yl)]methanes with 1,2-phenylenediamines in PriOH is accompanied by the recyclization to 8-R-or 7-R-4-(2-hydroxyphenyl)-1,5-benzodiazepin-2-ones, whereas the reaction with o-phenylenediamine and its
