Pyrimidines

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Applied Catalysis, A: General called Vapor-phase hydrogenation of levulinic acid to γ-valerolactone over Cu-Ni alloy catalysts, Author is Yanase, Daichi; Hara, Takayoshi; Sato, Fumiya; Yamada, Yasuhiro; Sato, Satoshi, which mentions a compound: 591-12-8, SMILESS is O=C1OC(C)=CC1, Molecular C5H6O2, Recommanded Product: 591-12-8.

Vapor-phase hydrogenation of levulinic acid (LA) to γ-valerolactone (GVL) was investigated over supported-type Cu-Ni/Al2O3 catalysts in H2 flow at 250°C. Ni-rich Cu-Ni/Al2O3 catalysts, typically 6 weight% Cu and 14 weight% Ni, achieved high LA conversion with high stability and high GVL selectivity. XRD analyses of the catalysts clarified that Cu-Ni alloy nanoparticles were produced on the alumina support by forming a solid solution of CuO-NiO. The Cu-Ni/Al2O3 catalyst showed the highest GVL productivity of 11.0 kg kg-1cat h-1 with a selectivity of 98.6%, although the catalyst was gradually deactivated with time on stream under high space velocity conditions. In the characterization of the used catalysts, the catalyst deactivation would be caused by the sintering of active Cu-Ni alloy nanoparticles, which could be induced by the cycle of the oxidation with H2O and the reduction with H2.

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Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

COA of Formula: C8H12ClNO2. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 5-(hydroxymethyl)-2,4-dimethylpyridin-3-ol hydrochloride, is researched, Molecular C8H12ClNO2, CAS is 148-51-6, about Untargeted Metabolomics Identifies Enterobiome Metabolites and Putative Uremic Toxins as Substrates of Organic Anion Transporter 1 (Oat1). Author is Wikoff, William R.; Nagle, Megha A.; Kouznetsova, Valentina L.; Tsigelny, Igor F.; Nigam, Sanjay K..

Untargeted metabolomics on the plasma and urine from wild-type and organic anion transporter-1 (Oat1/Slc22a6) knockout mice identified a number of physiol. important metabolites, including several not previously linked to Oat1-mediated transport. Several, such as indoxyl sulfate, derive from Phase II metabolism of enteric gut precursors and accumulate in chronic kidney disease (CKD). Other compounds included vitamins (pantothenic acid, 4-pyridoxic acid), urate, and metabolites in the tryptophan and nucleoside pathways. Three metabolites, indoxyl sulfate, kynurenine, and xanthurenic acid, were elevated in the plasma and interacted strongly and directly with Oat1 in vitro with IC50 of 18, 12, and 50 μM, resp. A pharmacophore model based on several identified Oat1 substrates was used to screen the NCI database and candidate compounds interacting with Oat1 were validated in an in vitro assay. Together, the data suggest a complex, previously unidentified remote communication between the gut microbiome, Phase II metabolism in the liver, and elimination via Oats of the kidney, as well as indicating the importance of Oat1 in the handling of endogenous toxins associated with renal failure and uremia. The possibility that some of the compounds identified may be part of a larger remote sensing and signaling pathway is also discussed.

There are many compounds similar to this compound(148-51-6)COA of Formula: C8H12ClNO2. 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.

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Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

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: (S)-3-Methoxypyrrolidine, is researched, Molecular C5H11NO, CAS is 120099-61-8, about Development of peptide epoxyketones as selective immunoproteasome inhibitors.Synthetic Route of C5H11NO.

A series of epoxyketone analogs with varying N-caps and P3-configurations were designed, synthesized and evaluated. We found that D-Ala in P3 was crucial for β5i selectivity over β5c. Notably, compounds (I) (R1 = II) (β5i IC50 = 26.0 nM, 25-fold selectivity) and I (r1 = III) (β5i IC50 = 25.1 nM, 24-fold selectivity) with the D-configuration at P3 were the most selective inhibitors. Although I (R1 = II and III) showed only moderate anti-proliferative activity against RPMI-8226 and MM.1S cell lines, based on our experiments, it indicates that the inhibition of β5i alone is not sufficient to exert anticancer effects and may rely on the complementary inhibition of β1i, β5c and β5i. These data further increase our understanding of immunoproteasome inhibitors in hematol. malignancies.

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Pyrimidine | C4H4N2 – PubChem,
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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Synthesis of 2,4-dimethyl-3-hydroxy-5-hydroxymethylpyridine》. Authors are Balyakina, M. V.; Rubtsov, I. A.; Zhdanovich, E. S.; Preobrazhenskii, N. A..The article about the compound:5-(hydroxymethyl)-2,4-dimethylpyridin-3-ol hydrochloridecas:148-51-6,SMILESS:OC1=C(C)C(CO)=CN=C1C.[H]Cl).Recommanded Product: 5-(hydroxymethyl)-2,4-dimethylpyridin-3-ol hydrochloride. Through the article, more information about this compound (cas:148-51-6) is conveyed.

2,4-Dimethyl- 3 – hydroxy-5- hydroxymethylpyridine (4- deoxypyridoxine) (I) was synthesized via the following intermediates: 2,4-dimethyl-5-cyano-6-pyridone (II), 2,4-dimethyl-3-nitro-5-cyano-6-pyridone (III), and 2,4-dimethyl-3-nitro-5-cyano-6-chloropyridine (IV). Reduction of IV was carried out in 1 step in dilute HCl over Pd-C. 2,4-Dimethyl-3-amino-5-aminomethylpyridine was converted without isolation to I by treatment with NaNO2. Thus, 33 ml. NH4OH (d20 0.9) was added with stirring to 40 g. EtO2CCH2CN, the mixture cooled with ice to 0-2° and the precipitate filtered off, washed at 0° with 20 ml. cold EtOH, and dried to yield 23.8 g. cyanoacetamide (V), m. 120-2°. The filtrate was evaporated to dryness to yield an addnl. 3.95 g. Acetylacetone (10.0 g.) was added at 70° to 8.4 g. V in 50 ml. MeOH and 1.12 ml. Me2NH to precipitate 88.1% II, m. 293.1-4.2°. A suspension of 4.44 g. II in 15 ml. Ac2O is treated with stirring with 2.3 ml. HNO3 (d20 1.4) and 2.3 ml. Ac2O at 35-40°, and the mixture stirred 2 hrs. at 18-20° and poured upon 23 g. crushed ice, to precipitate 56.4% yellow III, m. 272.0-2.6° (alc.). P2O5 (5.3 g.) is added to a suspension of 3.6 g. III in 36 ml. PhCl, the mixture heated with stirring 3 hrs. at 118-120° the solvent removed at 45-50°/10 mm., the residue treated with 3.6 ml. absolute alc., stirred, and left 8 hrs. at 0-4°, the precipitate filtered off, washed at 0° with 2 ml. alc., and dried, and the residue extracted with petr. ether (b. 60-70°) to give 62.2% yellow IV, m. 114-15°. IV (2.4 g.) in 25 ml. ice water was added to a pre-hydrogenated mixture of 0.10 g. PdCl2 with H2O, HCl, and C, the hydrogenation continued until the theoretical H absorption, the catalyst separated and washed with 2 ml. H2O, 2.4 ml. HCl (d20 1.18) added to the solution and washings, and the solution heated 1.5 hrs. at 80-5° during which 1.6 g. NaNO2 in 5 ml. H2O was added, the heating continued 30 more min. (neg. starch-iodide test), the solution evaporated in vacuo, the residue extracted with absolute alc., the extracts treated with activated C and concentrated until the appearance of crystals, the mixture kept 8 hrs. at 0-4°, and the precipitate filtered off, washed at 0° with 1 ml. alc., and dried to give 42.2% I, m. 256.1-7.2°.

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Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Journal of Heterocyclic Chemistry called The synthesis of a series of 7-amino-1-cyclopropyl-8-fluoro-1,4-dihydro-4-oxo-1,6-naphthyridine-3-carboxylic acids as potential antibacterial agents, Author is Sanchez, Joseph P.; Gogliotti, Rocco D., which mentions a compound: 35621-01-3, SMILESS is NC1CCNCC1.[H]Cl.[H]Cl, Molecular C5H14Cl2N2, Synthetic Route of C5H14Cl2N2.

A series of title compounds I [R = 3-aminopyrrolidin-1-yl, 3-(ethylaminomethyl)pyrrolidin-1-yl, 4-aminopiperidin-1-yl, piperazin-1-yl] was prepared and evaluated for antibacterial activity (no data). I were prepared by the displacement of the chloro substituent from I (R = Cl) with the requisite nitrogen nucleophile. The naphthyridine acid was synthesized in ten steps from pyridinecarboxylate II (R1 = OH, R2 = NO2). The key step in the sequence was a Schiemann reaction of II (R1 = Cl, R2 = N2+ PF6-) to give II (R1 = Cl, R2 = F).

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Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Reference of 5-Methylfuran-2(3H)-one. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: 5-Methylfuran-2(3H)-one, is researched, Molecular C5H6O2, CAS is 591-12-8, about Inhibitory activity of Co-microencapsulation of cell free supernatant from Lactobacillus plantarum with propolis extracts towards fish spoilage bacteria. Author is Kuley, Esmeray; Kuscu, Metanet Muhammet; Durmus, Mustafa; Ucar, Yilmaz.

Antibacterial properties of microencapsulated Lactobacillus plantarum cell-free supernatant (CFS) in combinations with aqueous or ethanolic propolis extract at doses of 1% against fish spoilage bacteria were investigated. Microencapsulated samples contained more than 17 compounds, of which furyl alc., acetic acid, maltol, and 2(5H) furanon were identified as common compounds The effects of microencapsulated CFS from L. plantarum in combination with or without propolis extracts on the fish spoilage bacteria varied according to the bacterial species. Among the fish spoilage bacteria, the highest antimicrobial activity of samples was observed against P. damselae with >15.5 mm inhibition diameter zone. Pure and microencapsulated CFS from L. plantarum showed the lowest antimicrobial effects on P. mirabilis with a corresponding inhibition diameter zone of 8.33 and 8.00 mm. Microencapsulated CFS from L. plantarum in combination with aqueous propolis extract had 25 mg/mL of MIC and 50 mg/mL of MBC on all bacteria although the bactericidal effect of microencapsulated samples in combination with ethanolic propolis extract occurred at a level of above 50 mg/mL. The study results revealed that co-microencapsulation of CFS obtained from L. plantarum with propolis extract, especially its aqueous extract, could be potentially used as antimicrobial agents to overcome microbial growth in foods.

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Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Reference of 5-Methylfuran-2(3H)-one. 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. Compound: 5-Methylfuran-2(3H)-one, is researched, Molecular C5H6O2, CAS is 591-12-8, about Continuous Hydrogenation of Ethyl Levulinate to 1,4-Pentanediol over 2.8Cu-3.5Fe/SBA-15 Catalyst at Low Loading: The Effect of Fe Doping.

Bimetallic Cu-Fe catalysts with low loading were prepared for hydrogenation of Et levulinate (EL) to 1,4-pentanediol (1,4-PDO). Among them, 2.8Cu-3.5Fe/SBA-15 (Cu/Fe molar ratio of 1:1.5) performed best, capable of converting EL to the key intermediate γ-valerolactone (GVL) at 140 °C with 97 % yield. It can also be used to hydrogenate GVL to 1,4-PDO with 92.6 % selectivity or convert EL to 1,4-PDO in one pot. The high activity of the catalyst at such a low loading was attributed to the highly dispersed metal species and the Fe doping effect. Various characterization methods indicated that Fe acted as both structural and electronic modifier to promote the chem. properties of the Cu species. Besides, the incorporation of Fe provided abundant Lewis acid sites and accelerated the reaction process. CuFeO2 was detected by energy-dispersive X-ray spectroscopy, XPS, and XRD. On the basis of a combination of characterization and reaction kinetics, synergistic catalysis by Cu0 and CuFeO2 is considered to be responsible for the excellent performance of the Cu-Fe catalysts.

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Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Recommanded Product: 4-Chloro-8-methylquinoline. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 4-Chloro-8-methylquinoline, is researched, Molecular C10H8ClN, CAS is 18436-73-2, about A mild and efficient method for the preparation of 3-(2′-aminoaryl)pyrazoles from 4-chloroquinolines. Author is Borges, Julio C.; de Oliveira, Cesar D.; da Silva Pinheiro, Luiz C.; Marra, Roberta K. F.; Khan, Misbahul Ain; Wardell, James L.; Wardell, Solange M. S. V.; Bernardino, Alice M. R..

The authors described a mild and efficient method for the formation of 3-(2′-aminoaryl)pyrazoles in excellent yields from reactions of 4-chloroquinolines with hydrazine. These heterocyclic ring opening reactions occur under much milder conditions then previously described. The structures of the compounds were determined by spectral data and confirmed by x-ray diffraction anal. of 3-(2′-amino-3′-methylphenyl)pyrazole [monoclinic, C2, a 25.9750(3), b 9.5820(6), c 7.8299(7) Å, β 107.541(3)°, V 1858.2(2) Å3, Z 8].

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Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Formula: C5H14Cl2N2. 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. Compound: Piperidin-4-amine dihydrochloride, is researched, Molecular C5H14Cl2N2, CAS is 35621-01-3, about Polyamine Analog Regulation of NMDA MK-801 Binding: A Structure-Activity Study.

A series of analogs and homologs of spermine were synthesized, and their impact on MK-801 binding to the N-methyl-D-aspartate (NMDA) receptor was evaluated. These tetraamines encompass both linear and cyclic compounds The linear mols. include norspermine, N1,N11-diethylnorspermine, N1,N12-bis(2,2,2-trifluoroethyl)spermine, homospermine, and N1,N14-diethylhomospermine. The cyclic tetraamines consist of the piperidine analogs N1,N3-bis(4-piperidinyl)-1,3-diaminopropane, N1,N4-bis(4-piperidinyl)-1,4-diaminobutane, N1,N4-bis(4-piperidinylmethyl)-1,4-diaminobutane, and N1,N4-bis[2-(4-piperidinyl)ethyl]-1,4-diaminobutane and the pyridine analogs N1,N3-bis(4-pyridyl)-1,3-diaminopropane, N1,N4-bis(4-pyridyl)-1,4-diaminobutane, N1,N4-bis(4-pyridylmethyl)-1,4-diaminobutane, and N1,N4-bis[2-(4-pyridyl)ethyl]-1,4-diaminobutane. This structure-activity set makes it possible to establish the importance of charge, intercharge distance, and terminal nitrogen substitution on polyamine-regulated MK-801 binding in the NMDA channel. Four families of tetraamines are included in this set: norspermines, spermines, homospermines, and tetraazaoctadecanes. Calculations employing a SYBYL modeling program revealed that the distance between terminal nitrogens ranges between 12.62 and 19.61 Å. The tetraamines are constructed such that within families cyclics and acyclics have similar lengths but different nitrogen pKa’s and thus different protonation, or charge, states at physiol. pH. The pKa values for all nitrogens of each mol. and its protonation state at physiol. pH are described. The modifications at the terminal nitrogens include introduction of Et and β,β,β-trifluoroethyl groups and incorporation into piperidinyl or pyridyl systems. The studies clearly indicate that polyamine length, charge, and terminal nitrogen substitution have a significant effect on how the tetraamine regulates MK-801 binding to the NMDA receptor. Thus a structure-activity basis set on which future design of MK-801 agonists and antagonists can be based is now available.

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Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Formula: C8H12ClNO2. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: 5-(hydroxymethyl)-2,4-dimethylpyridin-3-ol hydrochloride, is researched, Molecular C8H12ClNO2, CAS is 148-51-6, about Studies on anticoccidial agents. Part VI. Modification at the 2-position of 4-deoxypyridoxol and α4-norpyridoxol. Author is Morisawa, Yasuhiro; Kataoka, Mitsuru; Sakamoto, Toshiaki; Saito, Fumiko.

The title derivatives I (R = Me, R1 = Et; R = R1 = H; R = H, R1 = HOCH2; R = H, R1 = MeO) were prepared Thus, I (R = H, R1 = Me) was treated with PhCH2Cl and the product oxidized and treated with Ac2O to give 2-(acetoxymethyl)-3-(benzyloxy)-5-(benzyloxymethyl)pyridine, which was hydrolyzed and hydrogenated to give I (R = H, R1 = HOCH2). At 200 ppm I (R = H, R1 = MeO) had anticoccidial activity against Eimeria acervulina.

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Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia