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Upstream product

• 769-42-6 1,3-dimethylbarbituric acid 
• 99-61-6 3-nitro-benzaldehyde 
• 109-77-3 malononitrile 
• 41949-07-9 6-hydroxy-1,3-dimethyluracil 

Relevant academic research and scientific papers

Isoreticular interpenetrated pillared-layer microporous metal-organic framework as a highly effective catalyst for three-component synthesis of pyrano[2,3-d]pyrimidines

Two isoreticular microporous Zn(II)-MOFs, [Zn2(NH2-BDC)2(4-bpdh)]·3DMF (TMU-16-NH2) and [Zn2(BDC)2(4-bpdh)]·3DMF (TMU-16), (NH2-BDC = amino-1,4-benzenedicarboxylate, BDC = 1,4-be

Spirocyclopropanes from Intramolecular Cyclopropanation of Pyranopyrazoles and Pyranopyrimidine-diones and Lewis Acid Mediated (3 + 2) Cycloadditions of Spirocyclopropylpyrazolones

A robust intramolecular cyclopropanation reaction was first performed on pyranopyrazole and pyranopyrimidine-dione derivatives to obtain spirocyclopropylpyrazolones and barbiturates, using iodosylbenzene (PhIO) or the combination of iodobenzene diacetate (PIDA)/molecular iodine (I2), under mild reaction conditions. Syntheses of functionally and stereochemically diversified, novel spiropyrazolone fused 2-iminothiophene and spiropyrazolone fused pyrroline scaffolds were also demonstrated via Lewis acid catalyzed highly diastereoselective (3 + 2) cycloaddition reactions of the synthesized spiro-cyclopropyl pyrazolones with phenyl isothiocyanate and benzonitrile, respectively.

Synthesis, characterization and application of ZnFe2O4 nanoparticles as a heterogeneous ditopic catalyst for the synthesis of pyrano[2,3-d] pyrimidines

In the present work, ZnFe2O4 nanopowder, as a highly efficient and heterogeneous catalyst, was prepared and fully characterized by IR, UV, XRD, EDX and SEM analysis. The nanocatalyst was employed as a highly stable and reusable catal

Mn doped ZrO2 as a green, efficient and reusable heterogeneous catalyst for the multicomponent synthesis of pyrano[2,3-d]-pyrimidine derivatives

A simple and an efficient method has been developed for the one-pot multicomponent synthesis of pyrano[2,3-d]-pyrimidine derivatives. This was achieved through the condensation reaction between dimethylbarbituric acid, aromatic aldehyde and malononitrile

Nanoammonium salt: a novel and recyclable organocatalyst for one-pot three-component synthesis of 2-amino-3-cyano-4H-pyran derivatives

1,3-Propanediaminium methanesulfonate [(PDA)(MeSO3)] was synthesized as the first nanoaliphatic ammonium salt via a safe and simple chemical route in aqueous media. [(PDA)(MeSO3)] ammonium salt was characterized by XRD, TEM, SEM, EDS

Synthesis of pyrano[2,3‐d]pyrimidines and pyrido[2,3‐d]pyrimidines in the magnetized deionized water based on UV–visible study

Abstract: A green synthetic route to the facile one-pot multicomponent synthesis of pyrano[2,3‐d]pyrimidines and pyrido[2,3‐d]pyrimidines have been developed using magnetized deionized water (MDW) as a green solvent under catalyst-free conditions. All rea

L-Proline based ionic liquid: A highly efficient and homogenous catalyst for synthesis of 5-benzylidene-1,3-dimethylpyrimidine-2,4,6(1H,3H,5H)-trione and pyrano[2,3-d] pyrimidine diones under ultrasonic irradiation

A catalytic, practical, efficient procedure for the synthesis of 5-benzylidene-1,3-dimethylpyrimidine-2,4,6(1H,3H,5H)-trione and pyrano[2,3-d] pyrimidine diones at room temperature was developed using L-Proline nitrate ionic liquid under ultrasonic irradiation. The L-Proline nitrate is homogeneous and green catalyst easy to prepare by mixing L-Proline and nitric acid possess excellent catalytic activity under standard ultrasonic bath at room temperature for the synthesis of pyrimidine core. This adequate procedure offers some advantages like the use of green solvent H2O, environmentally green benign procedure, excellent yields, simple procedure, short reaction times, no need for column chromatographic separation and reusability of catalyst for five subsequent reaction.

Nano-basic silica as an efficient catalyst for the multi-component preparation of pyrano[2,3-d]pyrimidine derivatives

A high-yield protocol is explored for the synthesis of pyrano[2,3-d]pyrimidines through the multi-component reaction of aromatic aldehydes, 1,3-Dimethylbarbituric acid, and malononitrile using nano-basic silica as an efficient catalyst. The method tolerat

Synthesis of functionalized chromene and spirochromenes using L-proline-melamine as highly efficient and recyclable homogeneous catalyst at room temperature

An efficient and recyclable homogeneous catalyst is developed using commercially cheap L-proline and melamine for the synthesis of chromenes and spirochromenes (spirooxindoles) via multicomponent reactions at room temperature. Systematic studies were conducted in order to achieve desired reactivity and recyclability of the catalyst using various α-amino acids and aromatic amines as donor-acceptor pairs. Among the screened combinations, L-proline and melamine (3:1 ratio; 3 mol% on total weight) was found to be best catalyst to give the desired products with excellent yields (up to 99%) in very short times (1–15 min) at room temperature in DMSO as solvent. The catalyst was recovered by adding EtOAc and reused up to 5 cycles without losing the catalytic activity.

Synthesis and characterization of novel magnetic nanoparticles supported imidazole ion as an efficient catalytic system for the three-component reaction of arylaldehydes, malononitrile and a-hydroxy or a-amino active methylene compounds

Background: Recently, pyrimidine and chromene derivatives have concerned increasing attention because of the wide range of biological activities. Considering the prominence of pyrimidine and chromene derivatives, several procedures have been reported for the synthesis of these compounds. Herein, new magnetic nanoparticles supported ionic liquid has been evaluated for the synthesis of pyrimidine and chromene derivatives. Methods: In this method, pyrimidine and chromene compounds were synthesized by the multi-component reaction of aromatic aldehydes, malononitrile, and active methylene compounds in the presence of the new magnetic nanoparticles supported ionic liquid. The new nanocatalyst was characterized by using TEM, VSM, XRD and IR spectrum. Results: The remarkable advantages of this new procedure involve high yields, short experimental time, low cast and easy preparation of the catalyst and no need of any workup and purification. Magnetic properties of the catalyst led to the easy separation from the reaction mixture by using an external magnet. The catalyst can be reused several times in the desired reaction without significant decrease of its activity. Conclusion: An efficient and green method for the synthesis of chromene and pyrimidine compounds in the presence of magnetic nanoparticles supported ionic liquid have been developed. Thermal stability, low cost and easy synthesis of the catalyst, high yields, easy separation and purification of the product, short experimental time and using a green solvent such as water provided a useful and alternative method for such reactions.