Category: Pyrazines

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 4-Bromo-1-methyl-2-nitro-1H-imidazole(SMILESS: O=[N+](C1=NC(Br)=CN1C)[O-],cas:121816-79-3) is researched.Synthetic Route of C5H5FN2. The article 《Synthesis and hypoxia-selective cytotoxicity of a 2-nitroimidazole mustard》 in relation to this compound, is published in Bioorganic & Medicinal Chemistry Letters. Let’s take a look at the latest research on this compound (cas:121816-79-3).

A four-step synthesis of 5-[N,N-bis(2-chloroethyl)amino]-1-methyl-2-nitroimidazole from 1-methyl-2-nitroimidazole is described. This compound showed similar hypoxia-selective cytotoxicity to the dinitrobenzamide mustard SN 23862 in UV4 cells (ca. 40-fold), and superior selectivity (>7-fold) in repair-competent AA8 cells.

There are many compounds similar to this compound(121816-79-3)Reference of 4-Bromo-1-methyl-2-nitro-1H-imidazole. if you want to know more, you can check out my other articles. I hope it will help you，maybe you’ll find some useful information.

Reference:
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Recommanded Product: Ethyl oxazole-5-carboxylate. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: Ethyl oxazole-5-carboxylate, is researched, Molecular C6H7NO3, CAS is 118994-89-1, about Light-Promoted Copper-Catalyzed Enantioselective Alkylation of Azoles. Author is Li, Chen; Chen, Bin; Ma, Xiaodong; Mo, Xueling; Zhang, Guozhu.

A catalytic asym. alkylation of azoles with secondary 1-arylalkyl bromides through direct C-H functionalization is reported. Under blue-light photoexcitation, a copper(I)/carbazole-based bisoxazoline (CbzBox) catalytic system exhibits good reactivity and high stereoselectivity, thus offering an efficient strategy for the construction of chiral alkyl azoles. These reactions proceed at low temperature and are compatible with a wide range of azoles.

There are many compounds similar to this compound(118994-89-1)Recommanded Product: Ethyl oxazole-5-carboxylate. if you want to know more, you can check out my other articles. I hope it will help you，maybe you’ll find some useful information.

Reference:
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Ninhydrin-positive components derived from cystine during the cyanide-nitroprusside test》. Authors are Hambraeus, Leif; Reio, Lembitu.The article about the compound:2-Amino-4,5-dihydrothiazole-4-carboxylic acidcas:2150-55-2,SMILESS:O=C(C1N=C(N)SC1)O).Product Details of 2150-55-2. Through the article, more information about this compound (cas:2150-55-2) is conveyed.

NaCN used in the cyanide-nitroprusside test of Brand et. al to determine cystine (I) in urine (CA 24, 3555) could be effectively replaced by NaBH4 which yielded about the same color intensity as when NaCN was used. However, the color produced by NaBH4 faded very quickly. Studies were made to obtain some qual. and quant. data regarding the ninhydrin-pos. components during the reaction between NaCN, I, and Na nitroprusside by means of an automatic amino acid analyzer. When freshly prepared com. NaCN was used, 2 peaks were obtained (one of I and cysteine). With the addition of NaCN and I, no addnl. peak was found, but a new peak appeared which corresponded to 4-carboxythiazolidinon-2-imide (II) formed due to the cleavage of I. With pure I, peaks of II and another peak of 2-aminothiazoline-4-carboxylic acid appeared.

There are many compounds similar to this compound(2150-55-2)Product Details of 2150-55-2. if you want to know more, you can check out my other articles. I hope it will help you，maybe you’ll find some useful information.

Reference:
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Meyer, Claudio F.; Hell, Sandrine M.; Misale, Antonio; Trabanco, Andres A.; Gouverneur, Veronique researched the compound: 4-Aminopyrimidine( cas:591-54-8 ).Computed Properties of C4H5N3.They published the article 《Hydrodifluoromethylation of Alkenes with Difluoroacetic Acid》 about this compound( cas:591-54-8 ) in Angewandte Chemie, International Edition. Keywords: alkene difluoroacetic acid regioselective phenyliodine diacetate hydrodifluoromethylation light; hydrodifluoromethylated alkane preparation; difluoroacetic acid; hydrodifluoromethylation; hypervalent iodine compounds; photochemistry; radicals. We’ll tell you more about this compound (cas:591-54-8).

A facile method for the regioselective hydrodifluoromethylation of alkenes is reported using difluoroacetic acid and phenyliodine(III) diacetate in THF under visible-light activation. This metal-free approach stands out as it uses inexpensive reagents, does not require a photocatalyst, and displays broad functional group tolerance. The procedure is also operationally simple and scalable, and provides access in one step to high-value building blocks for application in medicinal chem.

There are many compounds similar to this compound(591-54-8)Computed Properties of C4H5N3. if you want to know more, you can check out my other articles. I hope it will help you，maybe you’ll find some useful information.

Reference:
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Product Details of 118994-89-1. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: Ethyl oxazole-5-carboxylate, is researched, Molecular C6H7NO3, CAS is 118994-89-1, about The Application of C-H Functionalization in the Development of a Concise and Convergent Route to the Phosphatidylinositol-3-kinase Delta Inhibitor Nemiralisib.. Author is Bream, Robert N.; Clark, Hugh; Edney, Dean; Harsanyi, Antal; Hayler, John; Ironmonger, Alan; Mc Cleary, Nadine; Phillips, Natalie; Priestley, Catherine; Roberts, Alastair; Rushworth, Philip; Szeto, Peter; Webb, Michael R.; Wheelhouse, Katherine.

The development of an improved and scalable method for the manufacture of Nemiralisib, a phosphatidylinositol-3-kinase delta inhibitor was studied. Incorporation of three consecutive catalytic reactions, including a palladium-catalyzed C-H functionalization and an iridium-catalyzed borylation, significantly simplified and shortened the synthetic sequence. The revised route was successfully implemented in pilot plant on multikilogram scale to deliver >100 kg of product.

There are many compounds similar to this compound(118994-89-1)Product Details of 118994-89-1. if you want to know more, you can check out my other articles. I hope it will help you，maybe you’ll find some useful information.

Reference:
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Effects of demineralization on the composition of microalgae pyrolysis volatiles in py-GC-MS, published in 2022-01-01, which mentions a compound: 591-54-8, Name is 4-Aminopyrimidine, Molecular C4H5N3, Related Products of 591-54-8.

This study compared the volatiles distribution in anal. scale pyrolysis (py-GC-MS) of Nannochloropsis gaditana (marine microalgae) and Scenedesmus almeriensis (freshwater microalgae) and their demineralized counterparts. The role of inorganic elements and their removal via ultrasonic treatment, water washing and (in)organic acid leaching were elucidated. Principal component anal. (PCA) and gray relational anal. were applied to analyze the pyrolysis volatiles distribution and demonstrate the influence of inorganic elements in pyrolysis, resp. Demineralization affects (breaks down) the chem. structure of carbohydrates, followed by (to a lesser extent) proteins and lipids. Acid leaching promoted hydrolysis and suppressed the catalytic effect associated to inorganic elements in subsequent pyrolysis, compared to ultrasonic treatment and water washing. Elements like K and Na had a larger catalytic influence on microalgae pyrolysis than Ca and Mg. The composition and pyrolytic formation mechanism of major product groups at 500°C were studied, including anhydrosugars, phenolics, furans, carboxylic acids, alcs., aliphatic hydrocarbons, aromatic hydrocarbons, N-heterocyclic compounds, nitriles and amides. The results indicate that demineralization shows pos. effects on fast pyrolysis of microalgae: (1) by disrupting the cell wall and releasing the lipids and cellular contents. Based on the py-GC-MS peak area normalized to sample mass, the relative contribution of hydrocarbons in the pyrolysis vapors increased from 25.5% (NG: Nannochloropsis gaditana) to 32.1% (NG-HCl: Nannochloropsis gaditana, HCl treated), and from 16.1% (SA: Scenedesmus almeriensis) to 22.4% (SA-HCl: Scenedesmus almeriensis, HCl treated); (2) by decreasing the relative yields in O-containing compounds resulting from the suppressed catalytic effects of alkali and alk. earth metals (53.3% (NG) to 37.1% (NG-HCl), 57.5% (SA) to 47.8% (SA-HCl)) that would otherwise have been present in non-demineralized microalgae feedstock. The effects of demineralization on the denitrogenation of pyrolysis vapors were not that obvious. Suggestions for potential full scale applications have been proposed.

There are many compounds similar to this compound(591-54-8)Related Products of 591-54-8. if you want to know more, you can check out my other articles. I hope it will help you，maybe you’ll find some useful information.

Reference:
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Simultaneous oxidative reaction crystallization of L-cystine from L-cysteine with enzyme reactions from DL-amino-thiazoline-carboxylic acid, published in 1994-06-30, which mentions a compound: 2150-55-2, Name is 2-Amino-4,5-dihydrothiazole-4-carboxylic acid, Molecular C4H6N2O2S, Synthetic Route of C4H6N2O2S.

A novel system for oxidative reaction crystallization of L-cystine (CySSCy) from L-cysteine (CySH) obtained by simultaneous enzyme reaction was studied. L-cysteine was produced from DL-amino-thiazoline-carboxylic acid (ATC) by enzymes in the same cell grown beforehand. Generally, the processes involving oxidation after enzyme reactions are time consuming and yield small size CySSCy crystals. In the present investigation oxygen was fed simultaneously along with the enzyme reaction in such a way that it was matched both with the production and oxidation rates of CySH yielding CySSCy at an optimum rate, thus minimizing the level of dissolved oxygen which suppresses the activities of the oxygen-sensitive enzymes. As a result, the overall reaction time was reduced and large size CySSCy crystals were obtained, while improving the enzyme reaction yield.

There are many compounds similar to this compound(2150-55-2)Synthetic Route of C4H6N2O2S. if you want to know more, you can check out my other articles. I hope it will help you，maybe you’ll find some useful information.

Reference:
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Wu, Peng; Bjoern-Yoshimoto, Walden E.; Staudt, Markus; Jensen, Anders A.; Bunch, Lennart researched the compound: 4-Aminopyrimidine( cas:591-54-8 ).Synthetic Route of C4H5N3.They published the article 《Identification and Structure-Activity Relationship Study of Imidazo[1,2-a]pyridine-3-amines as First Selective Inhibitors of Excitatory Amino Acid Transporter Subtype 3 (EAAT3)》 about this compound( cas:591-54-8 ) in ACS Chemical Neuroscience. Keywords: imidazopyridineamine preparation inhibitor excitatory amino acid transporter subtype EAAT3; EAAT3; EAAT3 inhibitors; Glutamate; excitatory amino acid transporter. We’ll tell you more about this compound (cas:591-54-8).

Screening of a library of 49,087 compounds at the excitatory amino acid transporter subtype 3 (EAAT3) led to the identification of 2-(furan-2-yl)-8-methyl-N-(o-tolyl)imidazo[1,2-a]pyridin-3-amine which showed a >20-fold preference for inhibition of EAAT3 (IC50 = 13 μM) over EAAT1,2,4 (EAAT1: IC50 ∼ 250 μM; EAAT2,4: IC50 > 250 μM). A small lipophilic substituent (Me or bromine) at the 7- and/or 8-position was essential for activity. Furthermore, the substitution pattern of the o-tolyl group (compound I) and the chem. nature of the substituent in the 2-position of tert-Bu 3-(8-bromo-7-methyl-3-(o-tolylamino)imidazo[1,2-a]pyridin-2-yl)azetidine-1-carboxylate are essential for the selectivity toward EAAT3 over EAAT1,2. The most prominent analogs to come out of this study are 2-(furan-2-yl)-8-methyl-N-(o-tolyl)imidazo[1,2-a]pyridin-3-amine and 8-Bromo-2-(furan-2-yl)-N-(o-tolyl)imidazo[1,2-a]pyridin-3-amine that display ∼35-fold selectivity for EAAT3 (IC50 = 7.2 μM) over EAAT1,2,4 (IC50 ∼ 250 μM).

There are many compounds similar to this compound(591-54-8)Synthetic Route of C4H5N3. if you want to know more, you can check out my other articles. I hope it will help you，maybe you’ll find some useful information.

Reference:
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 2-Amino-4,5-dihydrothiazole-4-carboxylic acid, is researched, Molecular C4H6N2O2S, CAS is 2150-55-2, about Simultaneous analysis of 28 urinary VOC metabolites using ultra high performance liquid chromatography coupled with electrospray ionization tandem mass spectrometry (UPLC-ESI/MSMS).Synthetic Route of C4H6N2O2S.

Volatile organic compounds (VOCs) are ubiquitous in the environment, originating from many different natural and anthropogenic sources, including tobacco smoke. Long-term exposure to certain VOCs may increase the risk for cancer, birth defects, and neurocognitive impairment. Therefore, VOC exposure is an area of significant public health concern. Urinary VOC metabolites are useful biomarkers for assessing VOC exposure because of non-invasiveness of sampling and longer physiol. half-lives of urinary metabolites compared with VOCs in blood and breath. We developed a method using reversed-phase ultra high performance liquid chromatog. (UPLC) coupled with electrospray ionization tandem mass spectrometry (ESI/MSMS) to simultaneously quantify 28 urinary VOC metabolites as biomarkers of exposure. We describe a method that monitors metabolites of acrolein, acrylamide, acrylonitrile, benzene, 1-bromopropane, 1,3-butadiene, carbon-disulfide, crotonaldehyde, cyanide, N,N-dimethylformamide, ethylbenzene, ethylene oxide, propylene oxide, styrene, tetrachloroethylene, toluene, trichloroethylene, vinyl chloride and xylene. The method is accurate (mean accuracy for spiked matrix ranged from 84 to104%), sensitive (limit of detection ranged from 0.5 to 20 ng mL-1) and precise (the relative standard deviations ranged from 2.5 to 11%). We applied this method to urine samples collected from 1203 non-smokers and 347 smokers and demonstrated that smokers have significantly elevated levels of tobacco-related biomarkers compared to non-smokers. We found significant (p < 0.0001) correlations between serum cotinine and most of the tobacco-related biomarkers measured. These findings confirm that this method can effectively quantify urinary VOC metabolites in a population exposed to volatile organics There are many compounds similar to this compound(2150-55-2)Synthetic Route of C4H6N2O2S. if you want to know more, you can check out my other articles. I hope it will help you，maybe you’ll find some useful information.

Reference:
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem

Category: pyrazines. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 3-(Pyridin-4-yl)-1H-pyrazol-5-amine, is researched, Molecular C8H8N4, CAS is 91912-53-7, about Discovery of a novel alpha-7 nicotinic acetylcholine receptor agonist series and characterization of the potent, selective, and orally efficacious agonist 5-(4-Acetyl[1,4]diazepan-1-yl)pentanoic acid [5-(4-Methoxyphenyl)-1H-pyrazol-3-yl] amide (SEN15924, WAY-361789). Author is Zanaletti, Riccardo; Bettinetti, Laura; Castaldo, Cristiana; Cocconcelli, Giuseppe; Comery, Thomas; Dunlop, John; Gaviraghi, Giovanni; Ghiron, Chiara; Haydar, Simon N.; Jow, Flora; Maccari, Laura; Micco, Iolanda; Nencini, Arianna; Scali, Carla; Turlizzi, Elisa; Valacchi, Michela.

Alpha-7 nicotinic acetylcholine receptors (α7 nAChR) are implicated in the modulation of many cognitive functions such as attention, working memory, and episodic memory. For this reason, α7 nAChR agonists represent promising therapeutic candidates for the treatment of cognitive impairment associated with Alzheimer’s disease (AD) and schizophrenia. A medicinal chem. effort, around our previously reported chem. series, permitted the discovery of a novel class of α7 nAChR agonists with improved selectivity, in particular against the α3 receptor subtype and better ADME profile. The exploration of this series led to the identification of 5-(4-acetyl[1,4]diazepan-1-yl)pentanoic acid [5-(4-methoxyphenyl)-1H-pyrazol-3-yl] amide [(I), SEN15924, WAY-361789], a novel, full agonist of the α7 nAChR that was evaluated in vitro and in vivo. Compound I proved to be potent and selective, and it demonstrated a fair pharmacokinetic profile accompanied by efficacy in rodent behavioral cognition models (novel object recognition and auditory sensory gating).

There are many compounds similar to this compound(91912-53-7)Category: pyrazines. if you want to know more, you can check out my other articles. I hope it will help you，maybe you’ll find some useful information.

Reference:
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem