Category: pyrimidines

The systematic study of pyrimidines began in 1884 with Pinner, who synthesized derivatives by condensing ethyl acetoacetate with amidines. Pinner first proposed the name “pyrimidin” in 1885. 554-01-8, formula is C5H7N3O, Name is 4-Amino-5-methylpyrimidin-2(1H)-one. The parent compound was first prepared by Gabriel and Colman in 1900, by conversion of barbituric acid to 2,4,6-trichloropyrimidine followed by reduction using zinc dust in hot water. Related Products of 554-01-8.

Adams, Alexander Nichols;Denton, Robert Daniel;Mueller, Rachel Lockridge research published 《 Gigantic genomes of salamanders indicate that body temperature, not genome size, is the driver of global methylation and 5-methylcytosine deamination in vertebrates》, the research content is summarized as follows. Transposable elements (TEs) are sequences that replicate and move throughout genomes, and they can be silenced through methylation of cytosines at CpG dinucleotides. TE abundance contributes to genome size, but TE silencing variation across genomes of different sizes remains underexplored. Salamanders include most of the largest C-values – 9 to 120 Gb. We measured CpG methylation levels in salamanders with genomes ranging from 2N = ∼58 Gb to 4N = ∼116 Gb. We compared these levels to results from endo- and ectothermic vertebrates with more typical genomes. Salamander methylation levels are approx. 90%, higher than all endotherms. However, salamander methylation does not differ from other ectotherms, despite an approx. 100-fold difference in nuclear DNA content. Because methylation affects the nucleotide compositional landscape through 5-methylcytosine deamination to thymine, we quantified salamander CpG dinucleotide levels and compared them to other vertebrates. Salamanders and other ectotherms have comparable CpG levels, and ectotherm levels are higher than endotherms. These data show no shift in global methylation at the base of salamanders, despite a dramatic increase in TE load and genome size. This result is reconcilable with previous studies that considered endothermy and ectothermy, which may be more important drivers of methylation in vertebrates than genome size.

Related Products of 554-01-8, 5-Methylcytosine is a methylated form of the nucleobase cytosine occurring predominantly in cytosine-phosphate-guanine (CpG) islands that are produced by DNA methyltransferases and may regulate gene expression. Like cytosine, the DNA sequence containing 5-methylcytosine (5-mC) is able to be replicated without error and 5-mC can pair with guanine in double stranded DNA. However, DNA sequences containing a high local concentration of 5-mC may be less transcriptionally active than areas with higher ratios of unmodified cytosine.
5-Methylcytosine belongs to the class of organic compounds known as hydroxypyrimidines. These are organic compounds containing a hydroxyl group attached to a pyrimidine ring. Pyrimidine is a 6-membered ring consisting of four carbon atoms and two nitrogen centers at the 1- and 3- ring positions. 5-Methylcytosine exists as a solid, slightly soluble (in water), and a very weakly acidic compound (based on its pKa). Within the cell, 5-methylcytosine is primarily located in the cytoplasm. 5-Methylcytosine can be biosynthesized from cytosine. Outside of the human body, 5-methylcytosine can be found in tea. This makes 5-methylcytosine a potential biomarker for the consumption of this food product.
5-methylcytosine is a pyrimidine that is a derivative of cytosine, having a methyl group at the 5-position. It has a role as a human metabolite. It is a member of pyrimidines and a methylcytosine. It derives from a cytosine.
5-Methylcytosine is a nucleic acid that is found in the DNA and RNA of the cell. It is an important component of methylation, which is the process by which a methyl group is added to a molecule. This process can lead to cellular transformation, a process that can cause cancer. 5-Methylcytosine has also been shown as a molecular pathogenesis factor in infectious diseases such as HIV and herpes simplex virus type 1. The presence of 5-methylcytosine in nuclear DNA has been detected by analytical techniques such as gas chromatography/mass spectrometry (GC/MS). There are many analytical methods, including GC/MS, that can be used to detect 5-methylcytosine in cellular nuclei., 554-01-8.

Referemce:
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: 5-(hydroxymethyl)-2,4-dimethylpyridin-3-ol hydrochloride, is researched, Molecular C8H12ClNO2, CAS is 148-51-6, about Gas electron diffraction and quantum chemical study of the structure of a 2-nitrobenzenesulfonyl chloride molecule.Quality Control of 5-(hydroxymethyl)-2,4-dimethylpyridin-3-ol hydrochloride.

A combined gas electron diffraction and quantum chem. (B3LYP/6-311+G**, B3LYP/cc-pVTZ, B3LYP/cc-pVTZ, midix (Cl), and MP2/cc-pVTZ) study of the structure of a 2-NO2-C6H4-SO2Cl mol. is performed. It is found exptl. that at a temperature of 345(5) K the gas phase contains two conformers of the C 1 symmetry. Conformer I with a nearly perpendicular arrangement of the S-Cl bond with respect to the benzene ring plane (the C(NO2)-C-S-Cl torsion angle is 84(3)°) is contained predominantly (69(12)%). In conformer II, the S-Cl bond is located near the benzene ring plane (the C(NO2)-C-S-Cl angle is 172(3)°). The following exptl. internuclear distances (Å) are obtained for conformer I: rh1(C-H) = 1.064(15), rh1(C-C)av = 1.397(3), rh1(C-S) = 1.761(6), rh1(S-O)av = 1.426(4), rh1(S-Cl) = 2.043(5), rh1(N-O)av = 1.222(4), rh1(C-N) = 1.485(16). In both conformers, the NO2 group is turned by more than 30° relative to the benzene ring plane.

After consulting a lot of data, we found that this compound(148-51-6)Quality Control of 5-(hydroxymethyl)-2,4-dimethylpyridin-3-ol hydrochloride can be used in many types of reactions. And in most cases, this compound has more advantages.

Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《The inhibition of growth of sarcoma 180 by combinations of vitamin B6 antagonists and acid hydrazides》. Authors are Brockman, R. Wallace; Thomson, J. Richard; Schabel, Frank M. Jr.; Skipper, Howard E..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).HPLC of Formula: 148-51-6. Through the article, more information about this compound (cas:148-51-6) is conveyed.

Deoxypyridoxine-HCl (I) and deoxypyridoxine phosphate (II) significantly restricted growth of sarcoma 180 in mice on a diet deficient in vitamin B6 (III), but not in mice on a complete diet. Many compounds of the acid hydrazide type also restricted growth of the sarcoma on a diet deficient in III, but none except 1,5-diaminobiuret at high dosage levels affected the tumor in mice on a complete diet. Combinations of II with acid hydrazides were more inhibitory to the tumor in mice on a complete diet than were combinations of I with acid hydrazides. The same combinations given to mice deficient in III resulted in severe restriction of tumor growth. Vitamins of the III group, i.e., pyridoxine-HCl, pyridoxamine-HCl, pyridoxal-HCl, and pyridoxal phosphate (IV), almost completely prevented the tumor-inhibiting effect of the combinations. Spectrophotometric studies demonstrated ability of the representative acid hydrazides to react with IV. The observed ability of acid hydrazides to enhance the inhibition of sarcoma 180 produced by III-deficiency and III-antagonists is attributed to formation of an inactive conjugate between the acid hydrazides and IV.

After consulting a lot of data, we found that this compound(148-51-6)HPLC of Formula: 148-51-6 can be used in many types of reactions. And in most cases, this compound has more advantages.

Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

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.Yamashita, Junko researched the compound: 5-(hydroxymethyl)-2,4-dimethylpyridin-3-ol hydrochloride( cas:148-51-6 ).Synthetic Route of C8H12ClNO2.They published the article 《Convulsive seizure induced by intracerebral injection of semicarbazide (an anti-vitamin B6) in the mouse》 about this compound( cas:148-51-6 ) in Journal of Nutritional Science and Vitaminology. Keywords: semicarbazide convulsion; antivitamin B6 convulsion. We’ll tell you more about this compound (cas:148-51-6).

Intracerebral injection of semicarbazide-HCl (I) [563-41-7] was more effective than systemic administration in inducing convulsions and tremors in mice. The symptoms were prevented by pyridoxine [65-23-6], aminooxyacetic acid [645-88-5] and acetone [67-64-1], but were enhanced by pyridoxal [66-72-8], pyridoxal phosphate [54-47-7] and other anti-B6 agents. Smaller doses of I were required for induction of the symptoms in vitamin B6-deficient mice than in controls. I applied to the vicinity of the lambda caused running fits, followed by convulsions and tremors.

After consulting a lot of data, we found that this compound(148-51-6)Synthetic Route of C8H12ClNO2 can be used in many types of reactions. And in most cases, this compound has more advantages.

Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Synthetic Route of C5H6O2. 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-Methylfuran-2(3H)-one, is researched, Molecular C5H6O2, CAS is 591-12-8, about Conversion of levulinic acid to γ-valerolactone over ultra-thin TiO2 nanosheets decorated with ultrasmall Ru nanoparticle catalysts under mild conditions. Author is Li, Shaopeng; Wang, Yanyan; Yang, Youdi; Chen, Bingfeng; Tai, Jing; Liu, Huizhen; Han, Buxing.

Herein, we demonstrate that quantum-sized Ru dot decorated ultra-thin anatase TiO2 nanosheets with exposed (001) facets could exhibit highly efficient catalytic activity during the conversion of levulinic acid to γ-valerolactone at room temperature The support effect has been largely attributed to the high energy of TiO2 (001) which can lead to a stronger interaction between the support and the metal. The surface of Ru/TiO2-n contains more Ru(0) and results in higher activity and selectivity.

After consulting a lot of data, we found that this compound(591-12-8)Synthetic Route of C5H6O2 can be used in many types of reactions. And in most cases, this compound has more advantages.

Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Kosower, Nechama S.; Rock, Rica A. published an article about the compound: 5-(hydroxymethyl)-2,4-dimethylpyridin-3-ol hydrochloride( cas:148-51-6,SMILESS:OC1=C(C)C(CO)=CN=C1C.[H]Cl ).Electric Literature of C8H12ClNO2. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:148-51-6) through the article.

Rats made porphyric by allylisopropylacetamide (I) are susceptible to induced convulsions. Female Sprague-Dawley rats (150-160 g.) were injected daily with 400 mg. I/kg. in 0.15M NaCl for 8-10 days. Controls received NaCl. Twenty-four hrs. after the last injection, control and exptl. animals were injected with isonicotinoylhydrazide (II) or 4-methoxymethylpyridoxol-HCl (III) at pH 7, or deoxypyridoxol-HCl (IV) at pH 7. Other animals were given pyridoxal-HCl (V) 15 min. prior to injection of the compounds At 0.75 millimoles II/kg., clonic-tonic convulsions occurred in 60% of porphyric rats and in none of the controls; at 1.12 millimoles/kg., 90% of the porphyric rats convulsed, and 20% of controls. At 0.5-2 millimoles/kg., V did not alter the convulsions induced by II. Following III at 0.25 millimoles/kg., 70% of porphyric rats convulsed, and all convulsed at 0.75 millimoles/kg. (but no controls convulsed). No difference was noted between controls and animals injected with IV. These compounds may act by interfering with pyridoxal 5-phosphate in the nervous system.

After consulting a lot of data, we found that this compound(148-51-6)Electric Literature of C8H12ClNO2 can be used in many types of reactions. And in most cases, this compound has more advantages.

Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

COA of Formula: C5H11NO. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: (S)-3-Methoxypyrrolidine, is researched, Molecular C5H11NO, CAS is 120099-61-8, about Design, synthesis and biological evaluation of benzo[cd]indol-2(1H)-one derivatives as BRD4 inhibitors. Author is Feng, Yuxin; Xiao, Senhao; Chen, Yantao; Jiang, Hao; Liu, Na; Luo, Cheng; Chen, Shijie; Chen, Hua.

A series of benzo[cd]indol-2(1H)-one derivatives were designed by structural optimization based on compound I and evaluated for their BRD4 (bromodomain-containing protein 4) inhibitory activity. The results showed that four compounds are the most potential ones with the IC50 values of 1.02 μM, 1.43 μM, 1.55 μM and 3.02 μM. According to their co-crystal structures in complex with BRD4_BD1 and the protein thermal shift assays, the binding modes were revealed that the addnl. indirect hydrogen bonds and hydrophobic interactions make such four compounds more active than I against BRD4. Furthermore, compounds I, 1-((1-ethyl-2-oxo-1,2-dihydrobenzo[cd]indol-6-yl)sulfonyl)pyrrolidine-2-carbohydrazide and 1-((1-ethyl-2-oxo-1,2-dihydrobenzo[cd]indol-6-yl)sulfonyl)pyrrolidine-2-carboxylic acid were chosen to evaluate for their antiproliferative activities on the MLL-AF4-expression acute leukemia cell line (MV4-11), other cancer cell lines and the non-cancer cell lines. The results showed that these compounds exhibited good and selective inhibitory activities against MV4-11 cells with the IC50 values of 11.67 μM, 5.55 μM, and 11.54 μM, resp., and could act on the cell proliferation by blocking cell cycle at G1 phase. They could markedly down-regulate the expressions of the c-Myc, Bcl-2 and CDK6 oncogenes in MV4-11 in the qRT-PCR and western blot studies, which further demonstrated that compound I and its derivatives could serve as a promising therapeutic strategy for MLL leukemia by targeting BRD4_BD1 protein.

After consulting a lot of data, we found that this compound(120099-61-8)COA of Formula: C5H11NO can be used in many types of reactions. And in most cases, this compound has more advantages.

Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 591-12-8, is researched, Molecular C5H6O2, about Construction of Enantioenriched γ,γ-Disubstituted Butenolides Enabled by Chiral Amine and Lewis Acid Cascade Cocatalysis, the main research direction is butenolide preparation enantioselective regioselective chemoselective; alkynoic acid aldehyde tandem cyclization amine Lewis catalyst.Electric Literature of C5H6O2.

A cascade cocatalysis strategy for the facile construction of chiral γ,γ-disubstituted butenolides I (R1 = Me, Et; R2 = Ph, 1-naphthyl, 2-furyl, etc.) has been described. The synthetic manifold employs simple alkynoic acids R1CCCH2C(O)2H instead of the preformed silyloxy furans or 5-substituted furan-2(3H)-ones II. In situ formed 5-substituted furan-2(3H)-ones II by AgNO3 or Ph3PAuCl/AgOTf catalyzed cyclization of alkynoic acids can smoothly engage in the subsequent chiral diphenylprolinol TMS-ether catalyzed Michael and Michael-aldol reactions. The cascade process serves as a general approach to chiral quaternary γ,γ-disubstituted butenolides I.

After consulting a lot of data, we found that this compound(591-12-8)Electric Literature of C5H6O2 can be used in many types of reactions. And in most cases, this compound has more advantages.

Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Characterization of key aroma-active compounds in four commercial oyster sauce by SGC/GC x GC-O-MS, AEDA, and OAV, published in 2022-04-30, which mentions a compound: 591-12-8, mainly applied to methylpropanal methylbutanal oyster sauce aroma olfactometry mass spectrometry, Related Products of 591-12-8.

Oyster sauce (OS) is a common seasoning in Asian countries. Here, four types of OS with different components and ingredients were characterized by the switchable GC/GC x GC-olfactometry-mass spectrometry (SGC/GC x GC-O-MS) and sensory evaluation. A total of 27 key aroma-active compounds were screened by FD factor and OAVs in OS. Of them, pyrazines were predominated, 2,5-dimethyl-3-ethylpyrazine had the highest OAV and FD factor. Sensory evaluation showed that the overall flavor profile of OS is primarily composed of nutty/roast, caramel/sweet, cooked potato-like, fruity, burnt, and unpleasant notes such as rancid, mushroom-like, and fishy. Moreover, soy sauce exhibited a great impact on OS aroma. The principal component anal. (PCA) results based on the OAV values of key aroma-active compounds were consistent with the sensory evaluation results, suggesting that PCA based on the above method could accurately cluster and distinguish the samples with different aroma profiles. The odor notes of burnt, fruity and caramel-like/sweet contributed to WDM and JC clustering. Similarly, roast/nutty, cooked potato-like, and unpleasant odor notes contributed to clustering of LKK and HT.

After consulting a lot of data, we found that this compound(591-12-8)Related Products of 591-12-8 can be used in many types of reactions. And in most cases, this compound has more advantages.

Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Direct Enantio- and Diastereoselective Vinylogous Addition of Butenolides to Chromones Catalyzed by Zn-ProPhenol, published in 2019-01-30, which mentions a compound: 591-12-8, mainly applied to butenolide chromone zinc ProPhenol catalyst enantioselective diastereoselective vinylogous addition; chromanone lactone stereoselective preparation, Formula: C5H6O2.

We report the first enantio- and diastereoselective 1,4-addition of butenolides to chromones. Both α,β- and β,γ-butenolide nucleophiles are compatible with the Zn-ProPhenol catalyst, and preactivation as the siloxyfurans is not required. The scope of electrophiles includes a variety of substituted chromones, as well as a thiochromone and a quinolone, and the resulting vinylogous addition products, e.g. I, are generated in good yield (31 to 98%), diastereo- (3:1 to >30:1), and enantioselectivity (90:10 to 99:1 er). These Michael adducts allow rapid access to several natural product analogs, and can be easily transformed into a variety of other interesting scaffolds as well.

After consulting a lot of data, we found that this compound(591-12-8)Formula: C5H6O2 can be used in many types of reactions. And in most cases, this compound has more advantages.

Reference:
Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia