Synthesis, structural and spectroscopic properties of asymmetric schiff bases derived from 2,3-diaminopyridine

Pazik, Agnieszka; Kamińska, Beata; Skwierawska, Anna; Ponikiewski, Łukasz

doi:10.1515/chempap-2016-0058

Cited by 5 publications

(2 citation statements)

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“…They can be easily synthesized by the condensation reaction between aldehydes or ketones with primary amines. They are important ligands in the synthesis of chelating agents in coordination chemistry, various dyes, pigments, and polymer stabilizers . Most of the Schiff bases which are prepared from aryl‐amines with benzaldehydes, salicylaldehyde, amoxicillin, pyridoxal, and sulphamethoxazole, act as antibacterial agents .…”

Section: Introductionmentioning

confidence: 99%

“…They are important ligands in the synthesis of chelating agents in coordination chemistry, various dyes, pigments, and polymer stabilizers. [11] Most of the Schiff bases which are prepared from aryl-amines with benzaldehydes, salicylaldehyde, amoxicillin, pyridoxal, and sulphamethoxazole, act as antibacterial agents. [12,13] Schiff bases are able to coordinate with transition metals as electron donating atoms, via nitrogen lone pare electrons, and also the biological activities of the Schiff bases can be enhanced by these complexes, especially with Co, Ni, Cu, and Zn ions.…”

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confidence: 99%

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Synthesis, characterization, and applications of novel Co(II)‐pyridoxalphosphate‐Schiffbase/SBA‐15 as a nanocatalyst for the green synthesis of benzothiazole heterocycles

Yari

Dehkharghani

Bardajee

et al. 2020

J Chinese Chemical Soc

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Mesoporous heterogeneous santa barbara amorphous (SBA)‐15‐supported cobalt complex, as a novel nanocatalyst containing N–O chelating Schiff‐base ligand was successfully synthesized by the reaction of SBA‐15 and Cobalt(II)‐Schiff‐base complex. The Co(II)‐Schiff base complex also was prepared for the first time, by the reaction of pyridoxal 5′‐phosphate or PLP (biological active form of vitamin B6), 3‐(aminopropyl)‐triethoxysilane in methanol that complexation with CoCl2. The subsequent grafting of entitled complex to SBA‐15 afforded Co(II)‐PLP‐Schiff base/SBA‐15 mesoporous catalyst. Characterization of the product was carried out with powder X‐ray diffraction, Brunauer–Emmett–Teller nitrogen adsorption–desorption, transmission electron microscopy, scanning electron microscopy, thermogravimetric analysis, atomic absorption spectroscopy, and inductively coupled plasma, Fourier‐transform infrared spectroscopy. The results revealed the retention of the textural properties and hexagonally uniform structures of SBA‐15 during the grafting procedure. This nanocatalyst was applied successfully for one‐pot synthesis of various benzothiazole heterocycles under green conditions. This catalyst is an active, reusable, and stable nanomaterial with no leaching of metal ions to the reaction medium. It was used for the synthesis of desired benzothiazole heterocycles by the cyclo‐condensation of aryl‐aldehydes with 2‐aminothiophenol with good to excellent yields and under green conditions.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%