Month: February 2023

Intelligently identifiable membrane immunochip sensor based on Braille-like code for simultaneous multi-veterinary drug detection was written by Xiao, Xiaoyue;Huang, Yanmei;Zhao, Xuelong;Bao, Huanhuan;Lu, Zhongwei;Shan, Shan;Liu, Daofeng;Lai, Weihua. And the article was included in Sensors and Actuators, B: Chemical in 2022.Recommanded Product: 1220-83-3 This article mentions the following:

There may be risk of multiple veterinary drug residues in one food sample; thus, a key challenge for the simultaneous detection of multiple targets was raised in food safety anal. In this study, a multi-dot membrane immunochip sensor (MIS) based on Braille-like code was proposed for the sensitive, specific, and simultaneous detection of four veterinary drugs: sulfamethazine (SMZ), amantadine (AMD), danfloxacin (DAN), and tylosin (TYL). The 16 types of residual situations for four veterinary drugs can be qual. and quant. analyzed through the Braille-like code and signal intensity of dots. In addition, an Android application was exploited to intelligently identify the Braille-like code pattern; thus, the residue situations of the corresponding veterinary drugs can be automatically output by a smartphone. The cutoff values were 25 ng/mL for the four veterinary drugs by the naked eye. The limits of detection for SMZ, AMD, DAN, and TYL were calculated as 0.22, 0.058, 0.29, and 0.14 ng/mL, resp. To verify the performance of this multi-dot MIS, spiked chicken samples with different concentrations were tested, and the results verified the accuracy and precision of this method. The average spiked recoveries were 79.2-116.7%, and the coefficient of variation was 1.6-10.5%. Flexible, versatile and intelligent discriminant methods give this multi-dot MIS great potential to rapidly recognize complex situations in the field of simultaneous detection of analytes. In the experiment, the researchers used many compounds, for example, 4-Amino-N-(6-methoxypyrimidin-4-yl)benzenesulfonamide (cas: 1220-83-3Recommanded Product: 1220-83-3).

4-Amino-N-(6-methoxypyrimidin-4-yl)benzenesulfonamide (cas: 1220-83-3) belongs to pyrimidine derivatives. The pyrimidine nitrogenous bases are derived from the organic compound pyrimidine through the addition of various functional groups. Drugs having the pyrimidine motif have manifested to exhibit gratifying biological activity like anticancer, antiviral, anti-inflammatory, antibacterial, and antihypertensive activities.Recommanded Product: 1220-83-3

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Synthesis and in vitro microbiological evaluation of an array of biolabile 2-morpholino-N-(4,6-diarylpyrimidin-2-yl)acetamides was written by Kanagarajan, V.;Thanusu, J.;Gopalakrishnan, M.. And the article was included in European Journal of Medicinal Chemistry in 2010.Formula: C16H13N3 This article mentions the following:

Biolabile 2-morpholino-N-(4,6-diarylpyrimidin-2-yl)acetamides I (R¹ = H, F, Me; R² = H, F, MeO) were synthesized and evaluated for their in vitro antibacterial and antifungal activities. The min. inhibitory concentration tested against the same set of bacterial and fungal strains showed that I (R¹ = F, R² = H) against β-Hemolytic streptococcus and Klebsiella pneumoniae and I (R¹ = R² = F) against Escherichia coli and Pseudomonas had excellent antibacterial activity. Compounds I (R¹ = F, R² = H, MeO) showed inhibition against Aspergillus flavus, I (R¹ = Me, R² = F) against Microsporum gypseum, I (R¹ = F, R² = MeO) against Mucor, and compounds I (R¹ = Me, R² = MeO; R¹ = R² = F) against Rhizopus. In the experiment, the researchers used many compounds, for example, 4,6-Diphenylpyrimidin-2-amine (cas: 40230-24-8Formula: C16H13N3).

4,6-Diphenylpyrimidin-2-amine (cas: 40230-24-8) belongs to pyrimidine derivatives. The pyrimidine derivatives can easily interact with enzymes, genetic materials, and bio components within the cell. Pyrimidine derivatives have been used in a wide variety of pharmaceuticals including general anesthetics, anti-epilepsy medication, anti-malaria medication, drugs for treating high blood pressure, and HIV medication.Formula: C16H13N3

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Background ions into exclusion list: A new strategy to enhance the efficiency of DDA data collection for high-throughput screening of chemical contaminations in food was written by Tan, Haiguang;Sun, Feifei;Abdallah, Mohamed F.;Li, Jianxun;Zhou, Jinhui;Li, Yi;Yang, Shupeng. And the article was included in Food Chemistry in 2022.Application In Synthesis of 4-Amino-N-(6-methoxypyrimidin-4-yl)benzenesulfonamide This article mentions the following:

Foods contaminated with hazardous compounds, could pose potential risks for human health. To date, there is still a big challenge in accurate identification. In this study, a novel data-dependent acquisition (DDA) approach, based on a combination of inclusion list and exclusion list, was proposed to acquire more effective MS/MS spectra. This strategy was successfully applied in a large-scale screening survey to detect 50 mycotoxins in oats, 155 veterinary drugs in dairy milk, and 200 pesticides in tomatoes. Compared with traditional acquisition modes, this new strategy has higher detection rate, particularly at ultra-low concentration by eliminating background influence, thereby generating the MS/MS spectra for more potential hazardous materials instead of matrix interference. Addnl., the obtained MS/MS spectra are simpler and more likely to be traced back than DIA. Moreover, this new strategy would be more comprehensively applied in food safety monitoring with the improvement of HRMS and post-acquisition techniques. In the experiment, the researchers used many compounds, for example, 4-Amino-N-(6-methoxypyrimidin-4-yl)benzenesulfonamide (cas: 1220-83-3Application In Synthesis of 4-Amino-N-(6-methoxypyrimidin-4-yl)benzenesulfonamide).

4-Amino-N-(6-methoxypyrimidin-4-yl)benzenesulfonamide (cas: 1220-83-3) belongs to pyrimidine derivatives. The aromatic compound pyrimidine, and its derivatives, are ubiquitous in nature. They are found in nucleic acids, vitamins, amino acids, antibiotics, alkaloids, and a variety of toxins. We all know its importance to life – pyrimidine and purine bases are included in the structure of DNA and RNA.Application In Synthesis of 4-Amino-N-(6-methoxypyrimidin-4-yl)benzenesulfonamide

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Thermodynamic Understanding of an Aza-Michael Reaction Enables Five-Step Synthesis of the Potent Integrin Inhibitor MK-0429 was written by Gupta, Anya;Condakes, Matthew L.. And the article was included in Journal of Organic Chemistry in 2021.SDS of cas: 90905-32-1 This article mentions the following:

A general strategy for the aza-Michael addition of nucleophilic heterocycles into β-substituted acrylates using potassium tert-butoxide as catalyst was describe . Demonstrating that the reaction is under thermodn. control underpins optimization efforts and enables rapid exploration of the substrate scope, with yields ranging from 55% to 94%. It was further leverage these lessons in a significantly shortened synthesis of MK-0429, a potent pan-integrin inhibitor previously taken into human clin. trials for the treatment of prostate cancer and osteoporosis. In the experiment, the researchers used many compounds, for example, 2-Methoxypyrimidine-5-carbaldehyde (cas: 90905-32-1SDS of cas: 90905-32-1).

2-Methoxypyrimidine-5-carbaldehyde (cas: 90905-32-1) belongs to pyrimidine derivatives. Pyrimidine also found in many synthetic compounds such as barbiturates and the HIV drug, zidovudine. Pyrimidine derivatives also play an important role in drug development, either in concert with other compounds or on their own.SDS of cas: 90905-32-1

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Metal-free cascade synthesis of unsymmetrical 2-aminopyrimidines from imidazolate enaminones was written by Cui, Xue;Ma, Jianting;Zeng, Tingting;Xu, Junyu;Li, Youbin;Wang, Xuesong. And the article was included in RSC Advances in 2021.Application of 40230-24-8 This article mentions the following:

A convenient metal-free synthesis of unsym. 2-aminopyrimidines I [R¹ = cyclopropyl, Ph, 4-MeC₆H₄, etc.; R² = Ph, 4-ClC₆H₄, 4-MeOC₆H₄, etc.] from imidazolate enaminones had been developed. In this procedure, various structural 2-aminopyrimidines I, as well as 4,5-dihydroisoxazol-5-ols and pyrazoles were synthesized in moderate to excellent yields. A plausible mechanism was also proposed for the cascade reaction. This method represented an effective strategy toward the synthesis of unsym. 2-aminopyrimidines I. In the experiment, the researchers used many compounds, for example, 4,6-Diphenylpyrimidin-2-amine (cas: 40230-24-8Application of 40230-24-8).

4,6-Diphenylpyrimidin-2-amine (cas: 40230-24-8) belongs to pyrimidine derivatives. The pyrimidine ring system has wide occurrence in nature as substituted and ring fused compounds and derivatives. Therapy for fungal infections is based mainly on four classes of antifungals: azoles, echinocandins, polyenes, and pyrimidine analogs.Application of 40230-24-8

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Aminopyrimidines as electron-rich azadienes: extension of the synthetic potential of hetero Diels-Alder reactions under acidic conditions was written by Garcia, Celeste;Melguizo, Manuel;Cobo, Justo;Sanchez, Adolfo;Nogueras, Manuel;Lopez, Ma Dolores;Low, John N.. And the article was included in Synlett in 2001.SDS of cas: 54030-56-7 This article mentions the following:

By addition of a catalytic amount of a strong acid and selection of the appropriate solvent, the cycloaddition reactions of MeO₂CCCCO₂Me (DMAD) to 6-pyrimidinamines drastically changed their course leading to pyrrolo[3,4-c]pyridines, while, in the absence of acid, 6-amino-3,4-pyridinedicarboxylates were obtained. This change was interpreted on the basis of acid interception of the non-isolable adducts formed by initial hetero Diels-Alder cycloaddition between the reactants. In the experiment, the researchers used many compounds, for example, 6-Amino-3-methyl-2-(methylthio)pyrimidin-4(3H)-one (cas: 54030-56-7SDS of cas: 54030-56-7).

6-Amino-3-methyl-2-(methylthio)pyrimidin-4(3H)-one (cas: 54030-56-7) belongs to pyrimidine derivatives. Pyrimidines are isomeric with two other forms of diazines: pyridazine, with the nitrogen atoms in the 1 and 2 positions; and pyrazine, with the nitrogen atoms in the 1 and 4 positions. As nucleotides in DNA and RNA, pyrimidine nucleotide derivatives have a wide range of biological applications. For example, pyrimidine derivatives are useful in DNA repair studies involving cancer and epigenetics.SDS of cas: 54030-56-7

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

One-pot synthesis and in vitro microbiological evaluation of pyrimidinyl thiazolidinones catalyzed by activated fly ash in dry media was written by Kanagarajan, V.;Gopalakrishnan, M.. And the article was included in Pharmaceutical Chemistry Journal in 2010.Recommanded Product: 40230-24-8 This article mentions the following:

Novel bioactive 2-phenyl-3-(4,6-diarylpyrimidin-2-yl)thiazolidin-4-ones were synthesized with good yields in a short reaction time by 1-pot multicomponent reaction of 2-amino-4,6-diarylpyrimidines, PhCHO, and thioglycolate under microwave irradiation in the presence of an activated fly ash catalyst in dry medium. The characterization of these compounds was performed by m.p., elemental anal., mass spectra, FT-IR, and ¹H and ¹³C NMR. In search for new leads toward potent antimicrobial agents, all the synthesized compounds were tested in vitro for their antibacterial activity against Bacillus subtilis and Micrococcus luteus and antifungal activity against Aspergillus niger, Candida albicans, Candida 6, and Candida 51, and the results were discussed. In the experiment, the researchers used many compounds, for example, 4,6-Diphenylpyrimidin-2-amine (cas: 40230-24-8Recommanded Product: 40230-24-8).

4,6-Diphenylpyrimidin-2-amine (cas: 40230-24-8) belongs to pyrimidine derivatives. The aromatic compound pyrimidine, and its derivatives, are ubiquitous in nature. They are found in nucleic acids, vitamins, amino acids, antibiotics, alkaloids, and a variety of toxins. For example, the neurotoxin tetrodotoxin is a pyrimidine derivative. It is found in a number of species including the Japanese puffer fish, the blue-ringed octopus, and the orange-bellied newt. Tetrodotoxin prevents the transmission of nerve signals and can result in paralysis and death.Recommanded Product: 40230-24-8

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Synthesis of cyano-substituted heterocycles by tetraethylammonium cyanide was written by Hermann, Klaus;Simchen, Gerhard. And the article was included in Liebigs Annalen der Chemie in 1981.Product Details of 75833-38-4 This article mentions the following:

RCN (R = optionally substituted 2-pyridinyl, 4-pyrimidinyl, 4-quinazolinyl, 2-quinazolinyl, 2-quinoxalinyl) were prepared by treating RCl with NMe₃ and treating RN⁺Me₃ Cl^– with Et₄N⁺ CN^– to give RCN. In the experiment, the researchers used many compounds, for example, 2-Chloropyrimidine-4-carbonitrile (cas: 75833-38-4Product Details of 75833-38-4).

2-Chloropyrimidine-4-carbonitrile (cas: 75833-38-4) belongs to pyrimidine derivatives. The pyrimidine derivatives can easily interact with enzymes, genetic materials, and bio components within the cell. For example, the neurotoxin tetrodotoxin is a pyrimidine derivative. It is found in a number of species including the Japanese puffer fish, the blue-ringed octopus, and the orange-bellied newt. Tetrodotoxin prevents the transmission of nerve signals and can result in paralysis and death.Product Details of 75833-38-4

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

A nanocomposite adsorbent of metallic copper, polypyrrole, halloysite nanotubes and magnetite nanoparticles for the extraction and enrichment of sulfonamides in milk was written by Jullakan, Sirintorn;Bunkoed, Opas. And the article was included in Journal of Chromatography B: Analytical Technologies in the Biomedical and Life Sciences in 2021.Recommanded Product: 4-Amino-N-(6-methoxypyrimidin-4-yl)benzenesulfonamide This article mentions the following:

A composite adsorbent composed of metallic copper (Cu), polypyrrole (PPy), halloysite nanotubes (HNTs) and magnetite nanoparticles (Fe3O4) was developed to extract and enrich sulfonamides by dispersive magnetic solid phase extraction The composite could adsorb sulfonamides via hydrogen bonding and hydrophobic, π-π and π-electron-metal interactions. The extraction conditions were optimized and the developed composite adsorbent was characterized and provided a large surface area that enhanced extraction efficiency for sulfonamides. Coupled with high performance liquid chromatog., the adsorbent was used to quant. determine sulfonamides found in milk samples. The response of the developed method exhibited linearity from 5.0 to 150.0μg kg-1 for sulfathiazole, and from 2.5 to 100.0μg kg-1 for sulfamerazine, sulfamonomethoxine and sulfadimethoxine. Limits of detection were between 2.5 and 5.0μg kg-1. Recoveries of sulfonamides in milk samples ranged from 83.0 to 99.2% with RSDs lower than 6%. The developed composite adsorbent showed good reproducibility and reusability. In the experiment, the researchers used many compounds, for example, 4-Amino-N-(6-methoxypyrimidin-4-yl)benzenesulfonamide (cas: 1220-83-3Recommanded Product: 4-Amino-N-(6-methoxypyrimidin-4-yl)benzenesulfonamide).

4-Amino-N-(6-methoxypyrimidin-4-yl)benzenesulfonamide (cas: 1220-83-3) belongs to pyrimidine derivatives. The aromatic compound pyrimidine, and its derivatives, are ubiquitous in nature. They are found in nucleic acids, vitamins, amino acids, antibiotics, alkaloids, and a variety of toxins. As nucleotides in DNA and RNA, pyrimidine nucleotide derivatives have a wide range of biological applications. For example, pyrimidine derivatives are useful in DNA repair studies involving cancer and epigenetics.Recommanded Product: 4-Amino-N-(6-methoxypyrimidin-4-yl)benzenesulfonamide

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Palladium(0)/NHC-Catalyzed Reductive Heck Reaction of Enones: A Detailed Mechanistic Study was written by Raoufmoghaddam, Saeed;Mannathan, Subramaniyan;Minnaard, Adriaan J.;de Vries, Johannes G.;Reek, Joost N. H.. And the article was included in Chemistry – A European Journal in 2015.Application of 16879-39-3 This article mentions the following:

We have studied the mechanism of the palladium-catalyzed reductive Heck reaction of para-substituted enones with 4-iodoanisole by using N,N-diisopropylethylamine (DIPEA) as the reductant. Kinetic studies and in situ spectroscopic anal. have provided a detailed insight into the reaction. Progress kinetic anal. demonstrated that neither catalyst decomposition nor product inhibition occurred during the catalysis. The reaction is first order in the palladium and aryl iodide, and zero order in the activated alkene, N-heterocyclic carbene (NHC) ligand, and DIPEA. The experiments with deuterated solvent ([D₇]DMF) and deuterated base ([D₁₅]Et₃N) supported the role of the amine as a reductant in the reaction. The palladium complex [Pd⁰(NHC)(1)] has been identified as the resting state. The kinetic experiments by stopped-flow UV/Vis also revealed that the presence of the second substrate, benzylideneacetone 1, slows down the oxidative addition of 4-iodoanisole through its competing coordination to the palladium center. The kinetic and mechanistic studies indicated that the oxidative addition of the aryl iodide is the rate-determining step. Various scenarios for the oxidative addition step have been analyzed by using DFT calculations (bp86/def2-TZVP) that supported the inhibiting effect of substrate 1 by formation of resting state [Pd⁰(NHC)(1)] species at the cost of further increase in the energy barrier of the oxidative addition step. In the experiment, the researchers used many compounds, for example, 2-Bromo-4,6-dimethylpyrimidine (cas: 16879-39-3Application of 16879-39-3).

2-Bromo-4,6-dimethylpyrimidine (cas: 16879-39-3) belongs to pyrimidine derivatives. The pyrimidine ring system has wide occurrence in nature as substituted and ring fused compounds and derivatives. A Cu-catalyzed and 4-HO-TEMPO-mediated [3 + 3] annulation of commercially available amidines with saturated ketones enables an efficient and facile synthesis of structurally important pyrimidines via a cascade reaction of oxidative dehydrogenation/annulation/oxidative aromatization.Application of 16879-39-3

Referemce:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia