Category: naphthyridine

COA of Formula: C7H8BrNO. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 2-Bromo-1-(1-methyl-1H-pyrrol-2-yl)ethanone, is researched, Molecular C7H8BrNO, CAS is 65438-97-3, about Pyrrole analogues of chloramphenicol. I. Synthesis and antibacterial activity of dl-threo-1-(1-methyl-4-nitro-pyrrole-2-yl)-2-dichloroacetamidopropane-1,3-diol. Author is Krajewska, Dorota; Dabrowska, Marta; Jakoniuk, Piotr; Rozanski, Andrzej.

The seven step synthesis of the title pyrrole analog (I) of chloramphenicol was described. The compound exhibits a significant antibacterial activity, over the 12-50% range of the chloramphenicol activity.

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1,8-Naphthyridine | C8H6N2 – PubChem

Computed Properties of C6H8N2OS. 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: 4-Methyl-6-(methylthio)pyrimidin-2-ol, is researched, Molecular C6H8N2OS, CAS is 16710-11-5, about Bis-s-triazolo[1,5-a:1′,5′-c]pyrimidine and some simple derivatives. Author is Brown, Desmond J.; Shinozuka, Kazuo.

A general synthetic route to the new tricyclic system bis-s-triazolo[1,5-a:1′,5′-c]pyrimidine is reported. Thus the parent heterocycle (I; R = R1 = H) is prepared from the key bicyclic intermediate, s-triazolo[18k-c]pyrimidin-5-ylamine, through the 5-dimethylaminomethyleneamino, 5-hydroxyaminomethyleneamino and 5-acetoxyaminomethyleneamino derivatives, followed by final cyclization. I (R = H, Me, R1 = H, Me, Ph) are prepared similarly. Structures are confirmed by NMR spectra.

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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Some properties of 5-halofurfurals》. Authors are Nazarova, Z. N..The article about the compound:5-Iodo-2-furaldehydecas:2689-65-8,SMILESS:IC1=CC=C(O1)C=O).Electric Literature of C5H3IO2. Through the article, more information about this compound (cas:2689-65-8) is conveyed.

The following derivatives of 5-halofurfurals are reported: 5-iodofurfural thiosemicarbazone, m. 162-3°, decompose 165°; 5-Br analog, decompose 196-7°; furfural thiosemicarbazone, m. 153-4°, decompose 180°; 5-bromofurfural 2,4-dinitrophenylhydrazone, m. 204-5°; 5-iodo analog, m. 210-11°; 5-iodofurfural NaHSO3 adduct, m. 220°; 5-Br analog, plates. Solubility: 5-Bromofurfural, in H2O, 20°, 0.5, g./100ml.; 100°, 2.5; in EtOH, 20°, 5.0; 78°, 120.0; in (CH2Cl)2, 20°, 3.7; 83°, over 360.0. 5-Iodofurfural, resp., 0°, 0.5; 3.0°, 40.0; 10.0°, over 360.0.

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1,8-Naphthyridine – Wikipedia,
1,8-Naphthyridine | C8H6N2 – PubChem

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 5-Iodo-2-furaldehyde( cas:2689-65-8 ) is researched.Electric Literature of C5H3IO2.Shen, Zhi-Liang; Lai, Yin-Chang; Wong, Colin Hong An; Goh, Kelvin Kau Kiat; Yang, Yong-Sheng; Cheong, Hao-Lun; Loh, Teck-Peng published the article 《Palladium-Catalyzed Cross-Coupling of Indium Homoenolate with Aryl Halide with Wide Functional Group Compatibility》 about this compound( cas:2689-65-8 ) in Organic Letters. Keywords: functional group tolerant indium homoenolate aryl halide coupling. Let’s learn more about this compound (cas:2689-65-8).

An efficient palladium-catalyzed cross-coupling of indium homoenolate with aryl halide is described. The reactions proceeded efficiently in DMA at 100 °C to afford the desired products of β-aryl ketones in moderate to good yields. Various important functional groups including ketone, ester, aldehyde, nitrile, hydroxide, and nitro groups can be well tolerated in the protocol.

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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, Article, Chemistry & Biodiversity called Synthesis and in vitro antimicrobial activity screening of new 3-acetyl-2,5-disubstituted-1,3,4-oxadiazoline derivatives, Author is Popiolek, Lukasz; Biernasiuk, Anna; Paruch, Kinga; Malm, Anna; Wujec, Monika, which mentions a compound: 2689-65-8, SMILESS is IC1=CC=C(O1)C=O, Molecular C5H3IO2, Formula: C5H3IO2.

Thirteen new 3-acetyl-2,5-disubstituted-1,3,4-oxadiazoline derivatives were synthesized from corresponding hydrazide-hydrazones of isonicotinic acid in the reaction with acetic anhydride. The obtained compounds were identified with the use of spectral methods (IR, 1H-NMR, 13C-NMR, MS). In vitro antimicrobial activity screening of synthesized compounds against a panel of bacteria and fungi revealed interesting antibacterial and antifungal activity of tested 1,3,4-oxadiazoline derivatives, which is comparable to that of commonly used antimicrobial agents.

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1,8-Naphthyridine – Wikipedia,
1,8-Naphthyridine | C8H6N2 – 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 Vicarious nucleophilic substitution of hydrogen, bisannulation and competitive reactions of α-haloalkyl carbanions with bicyclic azaaromatic compounds, published in 1991-03-31, which mentions a compound: 1569-17-1, Name is 4-Methyl-1,8-naphthyridine, Molecular C9H8N2, Electric Literature of C9H8N2.

Carbanions of RR1CHSO2R2 (I; R = Cl, R1 = H, Me, R2 = NMe2, Ph, CMe3, morpholino, tolyl; R = Br, R1 = H, R2 = tolyl) react with bicyclic heteroaromatic compounds (quinoxalines, naphthyridines, and 5-azaquinoxalines) according to 2 general pathways: vicarious nucleophilic substitution (VNS) of hydrogen and/or bisannulation. In some cases other competitive reactions are observed Factors governing the direction of these reactions are discussed in terms of the charge distribution in the anionic σ adducts and the reaction conditions. For example reaction of quinoxaline and quinoxaline N-oxide with I (R = Cl, R1 = H, R2 = Ph) gave bisazirinoquinoxaline II and VNS product III resp.

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Safety of 5-Iodo-2-furaldehyde. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 5-Iodo-2-furaldehyde, is researched, Molecular C5H3IO2, CAS is 2689-65-8, about Two Macrocycles in One Shot: Synthesis, Spectroscopy, Photophysics, and Tautomerism of 23-Oxahemiporphycene and 21-Oxacorrole-5-carbaldehyde. Author is Ostapko, Jakub; Kelm, Anna; Kijak, Michal; Lesniewska, Barbara; Waluk, Jacek.

The synthesis of 23-oxahemiporphycene, the first monooxa analog of hemiporphycene, a structural isomer of porphyrin, is reported. Its generation under McMurry reaction conditions is surprisingly accompanied by the appearance of a formyl derivative of oxacorrole, 21-oxacorrole-5-carbaldehyde. A mechanism for the formation of the latter is proposed, relying on pinacol rearrangement of titanium pinacolate. The structures of the most stable tautomeric forms are established for both compounds based on IR and NMR spectra combined with DFT calculations Spectral and photophys. characteristics are compared with those of structurally similar macrocycles. Replacement of one nitrogen by oxygen in hemiporphycene has only a minor impact. In contrast, for corrole it leads to the enhancement of stability and to strongly reduced rates of nonradiative deactivation of the lowest excited singlet state. This is explained by the planarity of oxacorroles, achieved by removing one of the inner hydrogen atoms from the inner cavity. Unusual crystal packing is observed for the protonated form of 23-oxahemiporphycene, which exhibits a π-π stacked columnar alignment of pos. charged macrocycle units.

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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 Infrared spectroscopic study of the condensation of iodofurfural bromofurfural with ketones. II, published in 1966, which mentions a compound: 2689-65-8, Name is 5-Iodo-2-furaldehyde, Molecular C5H3IO2, Recommanded Product: 2689-65-8.

cf. CA 61, 9373a. The condensation products of iodofurfural with allylacetone, Me2CO, and CH2Ac2, and of bromofurfural with (CH2)2Ac2 were prepared and their ir spectra given. The products were obtained in the presence of EtOH and NaOH without heating. They are soluble in organic solvents. The spectra and elemental analyses show that the products are individual compounds with conjugated C:C and C:O bonds. They can be used as catalysts in the synthesis of thermoreactive polymers on the basis of furfural, furfurylidenealdehydes, furfurylidene ketones, and their fusible products.

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1,8-Naphthyridine – Wikipedia,
1,8-Naphthyridine | C8H6N2 – PubChem

HPLC of Formula: 2689-65-8. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 5-Iodo-2-furaldehyde, is researched, Molecular C5H3IO2, CAS is 2689-65-8, about General synthetic approach towards annelated 3a,6-epoxyisoindoles by tandem acylation/IMDAF reaction of furylazaheterocycles. Scope and limitations. Author is Zubkov, Fedor I.; Nikitina, Eugenia V.; Galeev, Timur R.; Zaytsev, Vladimir P.; Khrustalev, Victor N.; Novikov, Roman A.; Orlova, Daria N.; Varlamov, Alexey V..

An efficient and versatile one-pot synthesis of 3,6a-epoxyisoindoles annelated with oxazine, oxazole, thiazine, thiazole, pyrimidine fragments and with their benzoannelated analogs is presented. The method is based on tandem N-acylation/intramol. cycloaddition (the intramol. Diels-Alder reaction of furan, IMDAF) reaction between α,β-unsaturated acid anhydrides and α-furyl substituted azaheterocycles. The latter can be easily prepared by condensation of diverse furfurals and 1,2- or 1,3-N,X-binucleophiles (aminoalcs., aminothiols, diamines). The observed IMDAF reaction is stereoselective: exo-adducts are formed exclusively with large prevalence of one of the diastereoisomers. In most cases, the condensation/N-acylation/IMDAF reaction sequence may be carried out via a one-pot domino protocol. The scope and limitations of the proposed approach are thoroughly investigated. The obtained Diels-Alder adducts are attractive and useful substrates for further transformations. Fused isoindoles can be prepared from them in one-step by aromatization of the 7-oxabicyclo[2.2.1]heptene ring. Other transformations, including halogenation, ring cleavage, and Wagner-Meerwein skeletal rearrangement, are also demonstrated. The spatial structures of the obtained compounds have been established by X-ray diffraction analyses.

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1,8-Naphthyridine | C8H6N2 – PubChem

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 4-Methyl-6-(methylthio)pyrimidin-2-ol( cas:16710-11-5 ) is researched.Application In Synthesis of 4-Methyl-6-(methylthio)pyrimidin-2-ol.Erkin, A. V.; Krutikov, V. I. published the article 《4-arylamino-2-(2-acetoxyethyl)amino-6-methylpyrimidines: Synthesis, deacetylation, and biological activity》 about this compound( cas:16710-11-5 ) in Russian Journal of General Chemistry. Keywords: ethanolamine acetate arylaminopyrimidinyl tuberculostatic preparation; pyrimidinediamine acetoxyethyl aryl tuberculostatic preparation; deacetylation acetoxyethylaminopyrimidine. Let’s learn more about this compound (cas:16710-11-5).

The reaction of 2-(2-acetoxyethyl)amino-4-chloro-6-methylpyrimidine with aromatic amines leads to a series of 4-arylamino-2-(2-acetoxyethyl)amino-6-methylpyrimidines. Deacetylation of these compounds proceeds in both acidic and basic media. Most of the (arylamino)pyrimidines obtained exhibit a pronounced antituberculous effect.

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1,8-Naphthyridine – Wikipedia,
1,8-Naphthyridine | C8H6N2 – PubChem