Category: pyrimidines

Related Products of 35621-01-3. 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 Synthesis and pharmacological evaluation of piperidine derivatives with various heterocyclic rings at the 4-position.

A series of piperidine derivatives with various heterocyclic rings at the 4-position, e.g. I, II, was prepared and tested for antihypertensive activity and other biol. activities. The antihypertensive effects of the present compounds in the spontaneous hypertensive rat were less potent than those of previously reported compounds However, some exhibited antiulcer and/or antiinflammatory activity. Structure-activity relationships are discussed.

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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 Pyridoxine-derived bicyclic aminopyridinol antioxidants: synthesis and their antioxidant activities, published in 2011, which mentions a compound: 148-51-6, mainly applied to bicyclic aminopyridinol derivative preparation antioxidant activity, Computed Properties of C8H12ClNO2.

A few facile synthetic pathway for bicyclic aminopyridinol antioxidants are presented. Attachment of a long alkyl chain to the bicyclic pyridinol scaffold was established using an ester linkage. Non-substituted pyrrolopyridinols and 1,3-oxazine-fused pyridinols were also synthesized as novel antioxidant scaffolds. Antioxidant activities were measured by a radical clock method and new compounds prepared are comparable to the best bicyclic aminopyridinol antioxidants.

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Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

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 Gas electron diffraction and quantum chemical study of the structure of a 2-nitrobenzenesulfonyl chloride molecule, published in 2011-08-31, which mentions a compound: 148-51-6, Name is 5-(hydroxymethyl)-2,4-dimethylpyridin-3-ol hydrochloride, Molecular C8H12ClNO2, Recommanded Product: 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.

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Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Product Details of 120099-61-8. 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: (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.

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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.Peddakasu, Ganga Bhavani; Velisoju, Vijay Kumar; Kandula, Manasa; Gutta, Naresh; VR Chary, Komandur; Akula, Venugopal researched the compound: 5-Methylfuran-2(3H)-one( cas:591-12-8 ).Quality Control of 5-Methylfuran-2(3H)-one.They published the article 《Role of group V elements on the hydrogenation activity of Ni/TiO2 catalyst for the vapour phase conversion of levulinic acid to γ-valerolactone》 about this compound( cas:591-12-8 ) in Catalysis Today. Keywords: hydrogenation nickel TiO2 catalyst vapor levulinate valerolactone. We’ll tell you more about this compound (cas:591-12-8).

Influence of group V elements such as Ta, Nb and V on the product distribution in the vapor phase hydrogenation of levulinic acid (LA) over Ni/TiO2 catalyst was examined at ambient pressure. The Nb promoted Ni/TiO2 demonstrated a high selectivity towards γ-valerolactone (GVL) compared to other catalysts at 275 °C. The TPR results showed a lower H2 uptake over Ta and V modified Ni/TiO2 which was explained due to a strong interaction between these oxide species with nickel. Presence of a high ratio of ionic nickel (Ni2+) on Ta and V modified catalyst could be a possible reason for the formation of valeric acid (VA) through the ring opening of GVL. The high GVL selectivity over the Ni-Nb/TiO2 catalyst attributed to the presence of a high proportion of Lewis acid sites in conjunction with finely dispersed Ni species on the catalyst surface. This however, is accomplished by the pyridine adsorbed diffuse reflectance IR Fourier transform spectroscopy (DRIFTS) and CO-chemisorption results.

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Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

SDS of cas: 591-12-8. 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-Methylfuran-2(3H)-one, is researched, Molecular C5H6O2, CAS is 591-12-8, about Diastereoselective multi-component tandem condensation: synthesis of 2-amino-4-(2-furanone)-4H-chromene-3-carbonitriles. Author is Gupta, Vijay; Sahu, Debashish; Jain, Shailja; Vanka, Kumar; Singh, Ravi P..

A general strategy for a one-pot stereoselective synthesis of 2-amino-4-(2-furanone)-4H-chromene-3-carbonitriles by reaction of salicylaldehyde, malononitrile and butenolides via a tandem Knoevenagel/Pinner/vinylogous Michael condensation is presented. The β,γ-butenolides gave a syn-selective MCR adduct with a dr up to 11.5 : 1. The mechanistic insight into the MCR was obtained by DFT calculations

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Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

Reference of 4-Chloro-8-methylquinoline. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 4-Chloro-8-methylquinoline, is researched, Molecular C10H8ClN, CAS is 18436-73-2, about Cp*CoIII-Catalyzed Alkylation of Primary and Secondary C(sp3)-H Bonds of 8-Alkylquinolines with Maleimides. Author is Kumar, Rakesh; Kumar, Rohit; Chandra, Devesh; Sharma, Upendra.

The cobalt(III)-catalyzed C(sp3)-H bond alkylation of 8-Me quinoline with maleimides is reported. In contrast to the rhodium-catalyzed method, in the current cobalt-catalyzed method, a catalytic amount of acid is used, and importantly, it is also applicable to secondary C(sp3)-H bond alkylation. The developed methodol. is applicable for N-alkyl- and N-aryl-substituted maleimides and unsubstituted maleimides, and it also tolerates the variety of functional groups on the 8-Me quinoline moiety. Atom-economy and high regioselectivity with good to excellent yields of the alkylated products under mild reaction conditions are important features of this method.

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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 Photo-Thermo-Dual Catalysis of Levulinic Acid and Levulinate Ester to γ-Valerolactone, the main research direction is photo thermo dual catalysis levulinic acid levulinate ester valerolactone.Safety of 5-Methylfuran-2(3H)-one.

Herein, we developed photo-thermo-dual catalytic strategies for the production of γ-valerolactone (GVL) from levulinic acid (LA) and its ester using platinum-loaded TiO2 as a dual-functional catalyst. Both catalytic systems were evaluated under mild reaction conditions. In the photocatalysis system, a base plays crucial roles in the conversion of LA and EL to GVL. The control experiments reveal that plausible mechanistic pathways of both systems proceed via the hydrogenation of the ketone group of LA to the corresponding alc. as a major intermediate followed by a subsequent cyclization step to GVL. This dual-functional catalyst provides alternative strategies for the conversion of LA and its ester into GVL, which could pave the way for biomass utilization in a more effective and practical manner.

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Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 4-Chloro-8-methylquinoline( cas:18436-73-2 ) is researched.Computed Properties of C10H8ClN.Zhu, You-Quan; He, Jing-Li; Niu, Yun-Xia; Han, Ting-Feng; Zhu, Kun published the article 《Rapid Microwave-Assisted, Solvent-Free Approach to Functionalization of 8-Methylquinolines via Rh-Catalyzed C(sp3)-H Activation》 about this compound( cas:18436-73-2 ) in ChemistrySelect. Keywords: aryl quinolinyl acetamide preparation; methylquinoline phenyl isocyanate microwave assisted CH activation; quinolinyl methyl benzamide preparation; phenyl dioxazolone methylquinoline microwave assisted CH activation. Let’s learn more about this compound (cas:18436-73-2).

A microwave-assisted synthesis of aryl (quinolinyl)acetamide derivatives I [R1 = H, 6-Cl, 4-Br, etc.; R2 = 3-Me, 4-F, 4-Cl, etc.] and quinolinyl (methyl)benzamide II via Rh-catalyzed C(sp3)-H activation of 8-methylquinoline under solvent-free condition was reported. In comparison with traditional method, this reaction proceeded more efficiently with excellent yield, a broad range substrate scope and good functional group tolerance.

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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 《Compounds affecting the development of housefly larvae》. Authors are Gouck, H. K.; LaBrecque, G. C..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).SDS of cas: 148-51-6. Through the article, more information about this compound (cas:148-51-6) is conveyed.

Larval medium (50 g.) was saturated with 100 ml. of water containing 0.5-0.1 g. of the compound and 100 housefly eggs added. After 4 days it was examined for larvae and 3 days later for pupae. Emerging flies laid their eggs on untreated medium after 7 days. A sample of eggs remained in the medium, which was examined for larvae. The flies of this generation were reared to the adult stage. Compounds (245) are listed which are larvicides at 0.5 g. but not at 0.1 g. dosage; 64 compounds are larvicides at a dosage of ≤0.1 g.; 19 cause mortality in the pupal stage. 1,4-Bis(3-hydroxypropionyl)piperazine dimethanesulfonate causes low oviposition or failure of eggs to hatch at 0.05 and 0.025%, low enough to permit some adult emergence.

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Pyrimidine | C4H4N2 – PubChem,
Pyrimidine – Wikipedia