Green sonosynthesis of pyridopyrimidines using heterogeneous Pd‐containing catalysts anchored on a hybrid organic–inorganic surface of <scp>SBA</scp>‐15

Bakhtiari, Atefeh; Safaei‐Ghomi, Javad; Teymuri, Raheleh

doi:10.1002/jccs.202100082

Cited by 3 publications

(3 citation statements)

References 28 publications

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“…While there is still a trace amount of Cl element whether in Figure 3c or 3d, which may be caused by the steric hindrance effect. This behavior also appears in other references [32–33] …”

Section: Resultssupporting

confidence: 86%

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Polyphosphazene‐Functionalized Microspheres as Efficient Catalysts for the Knoevenagel Reaction under Mild Conditions

Chen

Yuan³

et al. 2022

ChemPlusChem

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Inspired by the formation of microspheres by hexachlorocyclotriphosphazene and 4, 4'-sulfonyldiphenol, polyphosphazene-functionalized microspheres were developed. Benefits from the supported supper basic phosphazene, the yield exceeded 99 % at room temperature in the manner of second-order reaction kinetics toward Knoevenagel reaction and was still maintained at 99 % after 16 runs. In the experimental temperature from 0 °C to 90 °C, the yield increased from 92 % to 99 %, reflecting that the catalyst had strong applicability under mild conditions. This behavior was conducive to energy conservation. Meanwhile, simple separation and recovery further enhanced this advantage. In addition, the catalyst was also found to be insensitive to aqueous solution or organic solvents such as toluene, THF, EtOH and CH 3 CN. This property gave the Knoevenagel reaction a vast choice. All these features exhibit that this novel catalyst is an attractive and applicable alternative in organic synthesis.

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“…While there is still a trace amount of Cl element whether in Figure 3c or 3d, which may be caused by the steric hindrance effect. This behavior also appears in other references [32–33] …”

Section: Resultssupporting

confidence: 86%

“…This behavior also appears in other references. [32][33] In addition, PZS and PZS-PNX are characterized by elemental analysis as shown in Figure 3e. As expected, compared with the corresponding elements in PZS, the content of C, H, and N in PZS-PNX increases while the content of S decreases.…”

Section: Chempluschemmentioning

confidence: 99%

Polyphosphazene‐Functionalized Microspheres as Efficient Catalysts for the Knoevenagel Reaction under Mild Conditions

Chen

Yuan³

et al. 2022

ChemPlusChem

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“…In Continuing our previous researches 22 , to investigate the performance of ultrasonic irradiation, we report the fabrication of Co3O4@PPIL-Mo as a catalyst and for the synthesis of mono-spiro derivatives under ultrasonic irradiation. Also, literatures have been reported for the synthesis of spiroindolines 23 , pyridopyrimidines 24 , 2, 3-dihydroquinazolin-4 (1H)-ones 25 and oxidation of benzyl alcohol under ultrasonic irradiation 26 have been reported.…”

Section: Introductionmentioning

confidence: 99%

Silica nanospheres KCC-1 as a good catalyst for the preparation of 2-amino-4H-chromenes by ultrasonic irradiation

Oboudatian

Safaei‐Ghomi

2022

Sci Rep

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Fibrous nano-silica sphere (KCC-1) has appeared as a good and efficient catalyst for ultrasonic irradiation conditions in chemical reactions. This catalyst has the unique properties such as a fibrous surface morphology, high surface area and high mechanical stability. The results indicated that the KCC-1 nanocatalyst could be used as high-performance catalysts under high temperature and pressure condition in organic reaction under ultrasonic irradiation. Morphology, structure, and composition of the fibrous nano-silica sphere were described by N2 adsorption–desorption analysis, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray powder diffraction (XRD), thermogravimetric analysis (TGA) and Fourier-transform infrared spectroscopy (FT-IR). In this work, we used KCC-1@NH2 nanosilica as a basic catalyst for the preparation of chromenes under ultrasonic irradiation conditions for the first time. The recyclability, nontoxicity and high stability of the catalyst, combined with low reaction times and excellent yields, make the present protocol very useful for the synthesis of the title products under ultrasonic conditions. The produced products were confirmed via 1H NMR, 13C NMR, FT-IR analysis.

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Green synthesis of isatin-based compounds

Sadeghian

Bayat²

2022

Res Chem Intermed

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Green sonosynthesis of pyridopyrimidines using heterogeneous Pd‐containing catalysts anchored on a hybrid organic–inorganic surface of SBA‐15

Cited by 3 publications

References 28 publications

Polyphosphazene‐Functionalized Microspheres as Efficient Catalysts for the Knoevenagel Reaction under Mild Conditions

Polyphosphazene‐Functionalized Microspheres as Efficient Catalysts for the Knoevenagel Reaction under Mild Conditions

Silica nanospheres KCC-1 as a good catalyst for the preparation of 2-amino-4H-chromenes by ultrasonic irradiation

Green synthesis of isatin-based compounds

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