13475-35-9Relevant articles and documents
Simple protic ionic liquid [Et3NH][HSO4] as a proficient catalyst for facile synthesis of biscoumarins
Patil, Sandip K.,Awale, Deepak V.,Vadiyar, Madagonda M.,Patil, Suryakant A.,Bhise, Sagar C.,Kolekar, Sanjay S.
, p. 5365 - 5376 (2017)
Abstract: We have explored a number of protic ionic liquids (PILs) as a catalyst for the synthesis of biscoumarins by condensation of 4-hydroxycoumarin with an aromatic aldehyde. Methylimidazolium- and triethylammonium-based PILs were synthesized by simple neutralization reaction with protic acids. Triethylammonium hydrogen sulfate [Et3NH][HSO4] was found to be the best among the studied PILs concerning the yield of products and reaction time period. Different biscoumarin derivatives were synthesized based on 4-hydroxycoumarin and various substituted aromatic aldehydes at optimum reaction conditions. Obtained products were separated just by simple filtration. The facile method does not require additional purification for formed products. The catalyst has shown better yields along with outstanding recyclability, providing an environmental benign protocol for the synthesis of biscoumarin derivatives. Graphical Abstract: Screening of simple protic ionic liquids as a catalyst in the synthesis of biscoumarins, out of which [Et3NH][HSO4] was found to be best among the studied PILs.
Efficient one-pot synthesis of 4-hydroxy-2h chromene by heterogeneously catalyzed zno np and mesoporous aluminosilicate catalysts in solvent free condition
Aravind Kumar, J.,Krithiga, T.,Mahato, Birendra Nath,Yogalakshmi, G.
, p. 46 - 54 (2022/01/20)
4-Hydroxy-2H chromenes are fused benzopyran rings, an important class of biologically active compounds that are widely used as antibacterial, antiviral, antitumor, and anticancer agents. In this paper, we report the synthesis of 4-hydroxy-2H chromenes usi
Fabrication and characterization of the immobilized Cu(II) and Ni(II) species on silica-coated copper ferrite: as novel magnetically reusable nanocatalysts toward synthesis of biscoumarins
Zeynizadeh, Behzad,Sadeghbari, Maryam,Noroozi Pesyan, Nader
, p. 73 - 88 (2019/08/13)
In this study, we have synthesized magnetically nanoparticles (MNPs) of CuFe2O4@SiO2@AAPTMS@Ni(II) and CuFe2O4@SiO2@AAPTMS@Cu(II). The prepared nanocomposite systems were characterized usin
Synthesis and characterization of a magnetic graphene oxide/Zn-Ni-Fe layered double hydroxide nanocomposite: An efficient mesoporous catalyst for the green preparation of biscoumarins
Zeynizadeh, Behzad,Gilanizadeh, Masumeh
, p. 18794 - 18804 (2019/12/09)
In this study, a nanocomposite of Fe3O4@GO@Zn-Ni-Fe-layered double hydroxide was synthesized as a novel and efficient mesoporous magnetic nanocatalyst. The synthesis was carried out via the immobilization of Fe3O4/su
