Day: March 29, 2022

Kushtaev, A. A.; Djakonov, A. V.; Yudin, N. V.; Zbarsky, V. L. published an article about the compound: 6-Hydroxy-2-methylpyrimidin-4(3H)-one( cas:1194-22-5,SMILESS:CC1=NC(=CC(N1)=O)O ).Reference of 6-Hydroxy-2-methylpyrimidin-4(3H)-one. 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:1194-22-5) through the article.

6-Hydroxy-2-methylpyrimidine-4(3H)-one is known to be used as a precursor in the synthesis of FOX-7 via nitration reaction. In this connection we studied the nitration kinetics of 6-hydroxy-2-methylpyrimidine-4(3H)-one in sulfuric-nitric acid mixtures A byproduct reaction leading to a decrease in the yield of 2-(dinitromethylene)-5,5-dinitropyrimidine-4,6(1H,3H,5H)-dione was revealed. The data obtained allowed a scheme of the nitration process, which included three consecutive reactions. The reaction rate constants were obtained for each of the stages.

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Reference:
Oxazolidine – Wikipedia,
Oxazolidine | C3H7NO – PubChem

Computed Properties of C5H7BrO3. 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: Ethyl 3-bromo-2-oxopropanoate, is researched, Molecular C5H7BrO3, CAS is 70-23-5, about Fe3O4/CuO/ZnO@MWCNT MNCs as an efficient organometallic nanocatalyst promoted synthesis of new 1,2,4-triazolpyrimidoazepine derivatives: Investigation of antioxidant and antimicrobial activity. Author is Shirangi, Hannaneh Sadat; Varasteh Moradi, Ali; Ahmadi Golsefidi, Maziar; Hossaini, Zinatossadat; Jalilian, Hamid Reza.

In this study, the new 1,2,4-triazolpyrimidoazepine derivatives I [R = methoxycarbonyl; R1 = Me, Et; R3 = 4-methoxyphenyl, 4-chlorophenyl, 4-cyanophenyl, etc.; Ar = 4-methoxyphenyl, 4-chlorophenyl] in high yields using multicomponent reactions of isatins, alkyl bromides, activated acetylenic compounds, guanidine, aldehydes and hydrazonoyl chloride in the presence of Fe3O4/CuO/ZnO@MWCNT as a high performance catalyst in water at room temperature was synthesized. The Fe3O4/CuO/ZnO@MWCNT synthesizes using Petasites hybridus rhizome water extract as a green media and moderate base. As well Fe3O4/CuO/ZnO@MWCNT MNCs show a good improvement in the yield of the product and displayed significant reusable activity. Investigation of antioxidant ability of synthesized compounds I using radical trapping of diphenyl-picrylhydrazine (DPPH) and ferric reduction power experiment was another purpose in this research. Also, the antimicrobial activity of some synthesized compounds I proved by employing the disk diffusion test on Gram-pos. and Gram-neg. bacteria. This procedure was some benefits such as short reaction time, product with excellent yields, simple catalyst and products separation

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Reference:
Oxazolidine – Wikipedia,
Oxazolidine | C3H7NO – PubChem

Bellina, Fabio; Biagetti, Matteo; Guariento, Sara; Lessi, Marco; Fausti, Mattia; Ronchi, Paolo; Rosadoni, Elisabetta published an article about the compound: Oxazole( cas:288-42-6,SMILESS:O1C=NC=C1 ).SDS of cas: 288-42-6. 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:288-42-6) through the article.

A variety of 2-alkynyl(benzo)imidazoles I (R = Ph, n-hexyl, 2-chlorophenyl, etc.; R1 = R2 = H; R1R2 = -CH=CH-CH=CH-) have been synthesized by dehydrogenative alkynation of N-methylimidazole or 1-methyl-1H-1,3-benzodiazole with terminal alkynes RCCH in NMP under air in the presence of Ag2CO3 as the oxidant and Pd(OAc)2 as the catalyst precursor. The data obtained in this study support a reaction mechanism involving a non-concerted metalation deprotonation (n-CMD) pathway.

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Reference:
Oxazolidine – Wikipedia,
Oxazolidine | C3H7NO – PubChem

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Simple pyrimidines. VII. The fine structure of 4,6-dihydroxypyrimidine》. Authors are Brown, D. J.; Teitei, T..The article about the compound:6-Hydroxy-2-methylpyrimidin-4(3H)-onecas:1194-22-5,SMILESS:CC1=NC(=CC(N1)=O)O).Product Details of 1194-22-5. Through the article, more information about this compound (cas:1194-22-5) is conveyed.

cf. CA 59, 11490g. The ultraviolet spectrum of 4,6-dihydroxypyrimidine was compared with those of N-, O-, and 5-alkylated derivatives of fixed structures corresponding to possible tautomeric forms. Ultraviolet spectra in aqueous buffer of neutral mols. of 5,5-diethyl-1,4,5,6-tetrahydro-1,2-dimethyl-4,6-dioxopyrimidine, 4,6-dihydroxypyrimidine, 1,6-dihydro-4-methoxy-1-methyl-6- oxopyrimidine, 4,6-dimethoxypyrimidine, and 1,4-dihydro-6-methoxy-1-methyl-4-oxopyrimidine and ultraviolet spectra in alc. of 4,6-dihydroxy-5-methylpyrimidine, 4,6-dihydroxy-5-isopropylpyrimidine, 4,6-dihydroxy-2-n-propylpyrimidine, and 4,6-dihydroxypyrimidine were determined An aqueous solution consisted essentially of 1,4,5,6-tetrahydro-4,6-dioxopyrimidine in equilibrium with a smaller amount of 1,4-dihydro-6-hydroxy-4-oxopyrimidine. The existence of the active 5-methylene grouping within the ring was confirmed chem. by a ready condensation of benzaldehyde with the pyrimidine in aqueous solution

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Reference:
Oxazolidine – Wikipedia,
Oxazolidine | C3H7NO – PubChem

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, Review, Chemical Communications (Cambridge, United Kingdom) called Magnetic shielding paints an accurate and easy-to-visualize portrait of aromaticity, Author is Karadakov, Peter B.; VanVeller, Brett, which mentions a compound: 288-42-6, SMILESS is O1C=NC=C1, Molecular C3H3NO, Product Details of 288-42-6.

Chemists are trained to recognize aromaticity semi-intuitively, using pictures of resonance structures and Frost-Musulin diagrams, or simple electron-counting rules such as Huckel’s 4n + 2/4n rule. To quantify aromaticity one can use various aromaticity indexes, each of which is a number reflecting some exptl. measured or calculated mol. property, or some feature of the mol. wavefunction, which often has no visual interpretation or may not have direct chem. relevance. We show that computed isotropic magnetic shielding isosurfaces and contour plots provide a feature-rich picture of aromaticity and chem. bonding which is both quant. and easy-to-visualize and interpret. These isosurfaces and contour plots make good chem. sense as at at. positions they are pinned to the nuclear shieldings which are exptl. measurable through chem. shifts. As examples we discuss the archetypal aromatic and antiarom. mols. of benzene and square cyclobutadiene, followed by modern visual interpretations of Clar’s aromatic sextet theory, the aromaticity of corannulene and heteroaromaticity.

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Reference:
Oxazolidine – Wikipedia,
Oxazolidine | C3H7NO – PubChem