High-efficient synthesis of 2-imino-2H-chromenes and dihydropyrano[c]chromenes using novel and green catalyst (CaO@SiO2@AIL)
作者:Fatemeh Sameri、Akbar Mobinikhaledi、Mohammad Ali Bodaghifard
DOI:10.1007/s11164-020-04295-5
日期:2021.2
recyclable heterogeneous ionicliquid catalyst was synthesized. Catalytic activity of the CaO@SiO 2 @AIL hybrid nanoparticles was investigated for synthesis of the pharmaceutically valuable 2-imino-2 H- chromene and dihydropyrano[ c ]chromenederivatives. A wide range of amines and aromatic aldehydes containing either electron-withdrawing or electron-donating substituent were examined using optimized conditions
A novel series of biscoumarin (1–4) and dihydropyran (5–13) derivatives were synthesized via a one-pot multicomponent condensation reaction and evaluated for antibacterial and antitumor activity in vitro. The X-ray crystal structure analysis of four representative compounds, 3, 7, 9 and 11, confirmed the structures of these compounds. Compounds 1–4 showed the most potent antitumor activity among the total 13 derivatives; especially for compounds 1 and 2, they also emerged as promising antibacterial members with better antibacterial activity. In addition, the results of density functional theory (DFT) showed that compared with compounds 3 and 4, biscoumarins 1 and 2 had lower intramolecular hydrogen bonds (HB) energy in their structures.
Ru(II) complexes bearing tertiary phosphine ligands: a novel and efficient homogeneous catalyst for one-pot synthesis of dihydropyrano[3,2-c]chromene and tetrahydrobenzo[b]pyran derivatives
作者:Khalil Tabatabaeian、Hannaneh Heidari、Manouchehr Mamaghani、Nosrat O. Mahmoodi
DOI:10.1002/aoc.1866
日期:2012.2
A number of ruthenium complexes were prepared and their catalytic activities in three‐component one‐pot condensation of aldehydes, malononitrile and 4‐hydroxycoumarin or dimedone was considered to afford dihydropyrano[3,2‐c]chromenes and tetrahydrobenzo[b]pyranderivatives under optimum reaction conditions. We found that a catalytic amount of RuBr2(PPh3)4 efficiently promotes the reaction in a short
Zn (II)‐Schiff base covalently anchored to CaO@SiO
<sub>2</sub>
: A hybrid nanocatalyst for green synthesis of 4
<i>H</i>
‐pyrans
作者:Fatemeh Sameri、Mohammad Ali Bodaghifard、Akbar Mobinikhaledi
DOI:10.1002/aoc.6394
日期:2021.11
In this study, the Zn (II)-Schiff basecovalentlyanchored onto the surface of CaO@SiO2 nanoparticles. The structure of this hybrid nanomaterial (CaO@SiO2-NH2-Sal-Zn) was characterized using the analytical techniques such as Fourier transform infrared spectroscopy, field emission-scanning electron microscopy, X-ray powder diffraction, energy-dispersive X-ray spectroscopy, transmission electron microscopy