Search

The C@POM (carbon@polyoxometalate) containing H3PMo12O40 (PMo12), H5PMo10V2O40 (PMo10V2), H6PMo9V3O40 (PMo9V3), H7PMo8V4O40 (PMo8V4), H3PW12O40 (PW), and H4SiW12O40 (SiW) were prepared from natural potato as green, and cheap catalyst support source. The C@PMo10V2 was found to be a unique, effective, and eco-friendly catalyst for selective oxidation of sulfides, using 30% aq. H2O2. C@PMo10V2 composite was characterized by X-ray diffraction spectroscopy (XRD), energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), thermal gravimetric analysis (TGA), Fourier transform infrared (FT-IR) spectrophotometry, zeta sizer, and zeta potential. The XRD results show that during immobilization PMo10V2 on the carbon catalyst support (CCS), the crystallite structure of PMo10V2 and CCS was not changed. The SEM results show that PMo10V2 crystals deposited on the surface CCS rods as composite nanorod structure. A variety of sulfides, sulfur-containing model and real oil were oxidized with the C@PMo10V2/H2O2 at room temperature. Recovered catalyst show excellent activity for at least four repeating cycles.

Indeno[2′,1′:5,6]pyrido[2,3-d]pyrimidin-4,6-(5H,11H)dione derivatives were synthesized regioselectively in high yields by a three-component reaction of 1,3-indanedione, aromatic aldehydes and 2,6-diaminopyrimidin-4(3H)-one in the presence of 1,2-dimethyl-N-butanesulfonic acid imidazolium hydrogen sulfate ([DMBSI]HSO4) ionic liquid as green and reusable catalyst. This protocol produced the desired products in high yields (87–95%) and short reaction times (3–6 min).

Abstract Carboxymethyl cellulose (CMC) was used as an efficient, and environmentally friendly catalyst for the solvent-free three-component synthesis of quinazolinone derivatives by condensation of 2-aminobenzimidazole, dimedone or 1,3-cyclohexanedione, and different aldehydes. The catalyst was recovered easily, and reused without significant loss of its activity. Solvent-free and mild reaction conditions, nontoxic-, biodegradable-, and inexpensive catalyst, environmentally benign method, and high to excellent yields are some important features of this protocol. [ABSTRACT FROM AUTHOR]

The C@POM (carbon@polyoxometalate) containing H 3 PMo 12 O 40 (PMo 12 ), H 5 PMo 10 V 2 O 40 (PMo 10 V 2 ), H 6 PMo 9 V 3 O 40 (PMo 9 V 3 ), H 7 PMo 8 V 4 O 40 (PMo 8 V 4 ), H 3 PW 12 O 40 (PW), and H 4 SiW 12 O 40 (SiW) were prepared from natural potato as green, and cheap catalyst support source. The C@PMo 10 V 2 was found to be a unique, effective, and eco-friendly catalyst for selective oxidation of sulfides, using 30% aq. H 2 O 2 . C@PMo 10 V 2 composite was characterized by X-ray diffraction spectroscopy (XRD), energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), thermal gravimetric analysis (TGA), Fourier transform infrared (FT-IR) spectrophotometry, zeta sizer, and zeta potential. The XRD results show that during immobilization PMo 10 V 2 on the carbon catalyst support (CCS), the crystallite structure of PMo 10 V 2 and CCS was not changed. The SEM results show that PMo 10 V 2 crystals deposited on the surface CCS rods as composite nanorod structure. A variety of sulfides, sulfur-containing model and real oil were oxidized with the C@PMo 10 V 2 /H 2 O 2 at room temperature. Recovered catalyst show excellent activity for at least four repeating cycles. [ABSTRACT FROM AUTHOR]

Indeno[2′,1′:5,6]pyrido[2,3- d ]pyrimidin-4,6-(5 H ,11 H )dione derivatives were synthesized regioselectively in high yields by a three-component reaction of 1,3-indanedione, aromatic aldehydes and 2,6-diaminopyrimidin-4(3 H )-one in the presence of 1,2-dimethyl- N -butanesulfonic acid imidazolium hydrogen sulfate ([DMBSI]HSO 4 ) ionic liquid as green and reusable catalyst. This protocol produced the desired products in high yields (87–95%) and short reaction times (3–6 min). [ABSTRACT FROM AUTHOR]