Tag: M.W:100-200

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 ZnO nanorods as efficient catalyst for the green synthesis of thiophene derivatives: Investigation of antioxidant and antimicrobial activity, Author is Hamedani, Naghmeh Faal; Ghazvini, Maryam; Sheikholeslami-Farahani, Fatemeh; Bagherian-Jamnani, Mohammad Taghi, which mentions a compound: 70-23-5, SMILESS is O=C(OCC)C(CBr)=O, Molecular C5H7BrO3, Recommanded Product: Ethyl 3-bromo-2-oxopropanoate.

In this work, thiophene derivatives I [R = 4-H3CC6H4, 4-H3COC6H4, 4-O2NC6H4, CH3CH2OC(O); R1 = Me, Et; R2 = 4-H3CC6H4, 4-H3COC6H4] were synthesized in good yields via multicomponent reaction of isoquinoline, alkyl bromides BrCH2C(O)R, activated acetylenic compounds R1OC(O)CCC(O)OR1, isothiocyanates R2N=C=S, and catalytic amounts of ZnO nanorods (NRs) at room temperature under solvent-free conditions. This procedure for the synthesis of thiophene derivatives I is green, easy, and simple with excellent yield. In addition, DPPH radical scavenging and ferric reduction power experiment has been studied for the evaluation of the antioxidant activity of some prepared thiophenes, for example, I [R = CH3CH2OC(O), R1 = Me, R2 = 4-H3COC6H4 (A); R = 4-O2NC6H4, R1 = Me, R2 = 4-H3CC6H4 (B); R = CH3CH2OC(O), R1 = Me, R2 = 4-H3CC6H4 (C); R = CH3CH2OC(O), R1 = Et, R2 = 4-H3COC6H4 (D)]. As outcome, the compound (B) exhibited a noteworthy radical trapping activity and excellent reducing ability than synthetic antioxidants such as butylated hydroxytoluene (BHT) and 2-tertbutylhydroquinone (TBHQ). Moreover, the antimicrobial activity of some synthesized thiophenes was confirmed by employing the disk diffusion test on Gram-pos. and Gram-neg. bacteria. The obtained results of disk diffusion test showed that compounds (A), (B), (C), and (D) prevented bacterial growth.

This compound(Ethyl 3-bromo-2-oxopropanoate)Recommanded Product: Ethyl 3-bromo-2-oxopropanoate was discussed at the molecular level, the effects of temperature and reaction time on the properties of the compound were discussed, and the optimum reaction conditions were selected.

Reference:
Oxazolidine – Wikipedia,
Oxazolidine | C3H7NO – PubChem

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: Ethyl 3-bromo-2-oxopropanoate(SMILESS: O=C(OCC)C(CBr)=O,cas:70-23-5) is researched.Recommanded Product: Ethyl 3-bromo-2-oxopropanoate. The article 《KF/Clinoptilolite Nanoparticles as a Heterogeneous Catalyst for Green Synthesis of pyrido[2,1-a]isoquinolines using Four-Component Reaction of Alkyl Bromides》 in relation to this compound, is published in Combinatorial Chemistry & High Throughput Screening. Let’s take a look at the latest research on this compound (cas:70-23-5).

KF/Clinoptilolite nanoparticles were employed as a heterogeneous catalyst for the preparation of pyrido[2,1-a]isoquinoline derivatives I [R = CO2Et, Ph, 4-MeC6H4, etc.; R1 = CO2Et, 4-MeC6H4, 4-MeOC6H4; R2 = Me, Et] through a four-component reaction of isoquinoline, two different alkyl bromides and electron deficient internal alkynes at ambient temperature in water as green solvent. In this research, (2,2-diphenyl-1-picrylhydrazyl) radical trapping and reducing potential of ferric ion experiments was used for determining antioxidant activity of some newly synthesized compounds I [R = Ph, R1 = CO2Et, R2 = Me; R = 4-MeOC6H4, R1 = CO2Et, R2 = Me; R = CO2Et, R1 = 4-MeOC6H4, R2 = Et; R = CO2Et, R1 = CO2Et, R2 = Me] and comparing results with synthetic antioxidants (TBHQ and BHT). Above compounds displayed trace DPPH radical trapping and excellent reducing power of ferric ion. Furthermore, the power of some prepared compounds against Gram-pos. and Gram-neg. bacteria was proved by employing the disk dispersion experiment The obtained results of disk diffusion test showed that compounds I [R = Ph, R1 = CO2Et, R2 = Me; R = 4-O2NC6H4, R1 = CO2Et, R3 = Me; R = CO2Et, R1 = 4-MeC6H4, R2 = Me] prevented the bacterial growth.

This compound(Ethyl 3-bromo-2-oxopropanoate)Electric Literature of C5H7BrO3 was discussed at the molecular level, the effects of temperature and reaction time on the properties of the compound were discussed, and the optimum reaction conditions were selected.

Reference:
Oxazolidine – Wikipedia,
Oxazolidine | C3H7NO – PubChem

SDS of cas: 1194-22-5. 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: 6-Hydroxy-2-methylpyrimidin-4(3H)-one, is researched, Molecular C5H6N2O2, CAS is 1194-22-5, about Synthesis of triple [14C]-labeled moxonidine. Author is Czeskis, Boris A..

The synthesis of radiolabeled antihypertensive compound [14C3]moxonidine I was accomplished based on condensation of [1-14C]acetamidine with di-Et [1,3-14C2]malonate to form [2,4,6-14C3]-4,6-dihydroxy-2-methylpyrimidine. Subsequent nitration, chlorination, and hydrogenation of the latter gave [2,4,6-14C3]-4,6-dichloro-2-methyl-5-aminopyrimidine. The final product was obtained after the coupling of the above aminopyrimidine with 1-acetylimidazolidin-2-one, followed by hydrolysis using sodium methoxide.

This compound(6-Hydroxy-2-methylpyrimidin-4(3H)-one)SDS of cas: 1194-22-5 was discussed at the molecular level, the effects of temperature and reaction time on the properties of the compound were discussed, and the optimum reaction conditions were selected.

Reference:
Oxazolidine – Wikipedia,
Oxazolidine | C3H7NO – PubChem

Category: oxazolidine. 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: 6-Hydroxy-2-methylpyrimidin-4(3H)-one, is researched, Molecular C5H6N2O2, CAS is 1194-22-5, about An efficient and convenient synthesis of 4,6-dichloro-2-methyl-5-nitropyrimidine. Author is Zhou, Shuwen; Xu, Defeng; Wang, Ziqiao; Zhu, Zhiling; Zha, Zhenyu; Fan, Yu; Su, Hongkui.

A convenient synthesis of 4,6-dihydro-2-methylpyrimidine can be obtained by cyclization reaction of acetamidine hydrochloride and di-Et malonate in the presence of sodium methoxide for a 91.2% yield. 4,6-Dihydro-2-methyl-5-nitropyrimidine achieved by nitration under the mixed acids of nitric acid, trichloroacetic acid and acetic acid in an 88.3% yield and then the chlorination using phosphorus oxytrichloride can afford 4,6-dichloro-2-methyl-5-nitropyrimidine with an 82.6% yield.

This compound(6-Hydroxy-2-methylpyrimidin-4(3H)-one)Category: oxazolidine was discussed at the molecular level, the effects of temperature and reaction time on the properties of the compound were discussed, and the optimum reaction conditions were selected.

Reference:
Oxazolidine – Wikipedia,
Oxazolidine | C3H7NO – PubChem

SDS of cas: 70-23-5. 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: Ethyl 3-bromo-2-oxopropanoate, is researched, Molecular C5H7BrO3, CAS is 70-23-5, about Synthesis of tubuvaline (Tuv) fragment of tubulysin via diastereoselective dihydroxylation of homoallylamine.

Tubulysins are natural anticancer mols. that directly bind and inhibit tubulin polymerization in actively dividing cells leading to apoptosis and cell death. Structurally, tubulysins are linear tetrapeptides, constituted by a natural amino acid (Ile) and three non-canonical amino acids (Mep, Tuv, and Tup). Herein, we report a convenient strategy for the practical synthesis of tubuvaline fragment of tubulysin natural products. In this approach, we describe the regioselective ring opening of a chiral aziridine with vinyl Grignard reagent to obtain (R)-tert-butyl(2-methylhex-5-en-3-yl)(tosyl)carbamate which was further subjected to Sharpless asym. dihydroxylation with AD-mix-β resulting in the formation of (2 R,4R)-4-((tert-butoxycarbonyl)amino)-2-(methoxymethoxy)-5-methylhexanoic acid that was finally transformed to tubuvaline by heterocyclization.

This compound(Ethyl 3-bromo-2-oxopropanoate)SDS of cas: 70-23-5 was discussed at the molecular level, the effects of temperature and reaction time on the properties of the compound were discussed, and the optimum reaction conditions were selected.

Reference:
Oxazolidine – Wikipedia,
Oxazolidine | C3H7NO – PubChem

Zeng, Hongyun; Zhang, Jun-gan; Hong, Wei published an article about the compound: Ethyl 3-bromo-2-oxopropanoate( cas:70-23-5,SMILESS:O=C(OCC)C(CBr)=O ).HPLC of Formula: 70-23-5. 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:70-23-5) through the article.

Thiazole ring is an important five-membered aromatic heterocyclic ring, and its derivatives have various biol. activities and are widely used in medicine. The synthesis of 2,5-diarylthiazole derivatives by acylation, thiolation, cyclization and Heck reaction using inexpensive and readily available substituted benzoic acid as raw materials was developed. The key point was to optimize the Heck reaction conditions and explore the possible reaction mechanism. The method has mild reaction conditions, simple operation, and good substrate universality, which provides a new direction for the synthesis of 2,5-diaryl substituted thiazoles.

This compound(Ethyl 3-bromo-2-oxopropanoate)HPLC of Formula: 70-23-5 was discussed at the molecular level, the effects of temperature and reaction time on the properties of the compound were discussed, and the optimum reaction conditions were selected.

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 《Experimental therapy of stomach ulcers in rats》. Authors are Akimov, A. A.; Pazarev, N. V..The article about the compound:6-Hydroxy-2-methylpyrimidin-4(3H)-onecas:1194-22-5,SMILESS:CC1=NC(=CC(N1)=O)O).Safety of 6-Hydroxy-2-methylpyrimidin-4(3H)-one. Through the article, more information about this compound (cas:1194-22-5) is conveyed.

Gastric ulcers were induced in rats by repeated administration of caffeine by a gastric sonde. Animals were then treated with 4-methyluracil (I), dihydrouracil, dihydro-4-methyluracil, 5-hydroxy-4-methyluracil, thymine, 4,6-dihydroxypyrimidine (II), 2-methyl-4,6-dihydroxypyrimidine (III), cytosine (IV), 4-amino-6-hydroxypyrimidine, or 2-amino-6-oxy-4-methylpyrimidine (all compounds given by gastric sonde, 50 mg./kg.). A 42-72% reduction of ulcers followed the treatment of animals with I, II, III, and IV; with all other compounds the effect was not significant. Combined treatment of rats with I and III, or I and IV was most effective. Higher doses of all compounds tested had a smaller therapeutic effect. Pyrimidines apparently stimulate regenerative processes and thus complement the effect of other therapeutics in the treatment of gastric ulcers.

This compound(6-Hydroxy-2-methylpyrimidin-4(3H)-one)Safety of 6-Hydroxy-2-methylpyrimidin-4(3H)-one was discussed at the molecular level, the effects of temperature and reaction time on the properties of the compound were discussed, and the optimum reaction conditions were selected.

Reference:
Oxazolidine – Wikipedia,
Oxazolidine | C3H7NO – PubChem

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 2,6-Dichloropurine(SMILESS: C2=NC1=C(C(=NC(=N1)Cl)Cl)[NH]2,cas:5451-40-1) is researched.Related Products of 1194-22-5. The article 《System-oriented optimization of multi-target 2,6-diaminopurine derivatives: Easily accessible broad-spectrum antivirals active against flaviviruses, influenza virus and SARS-CoV-2》 in relation to this compound, is published in European Journal of Medicinal Chemistry. Let’s take a look at the latest research on this compound (cas:5451-40-1).

The worldwide circulation of different viruses coupled with the increased frequency and diversity of new outbreaks, strongly highlight the need for new antiviral drugs to quickly react against potential pandemic pathogens. Broad-spectrum antiviral agents (BSAAs) represent the ideal option for a prompt response against multiple viruses, new and re-emerging. Starting from previously identified anti-flavivirus hits, we report herein the identification of promising BSAAs by submitting the multi-target 2,6-diaminopurine chemotype to a system-oriented optimization based on phenotypic screening on cell cultures infected with different viruses. Among the synthesized compounds, 6i showed low micromolar potency against Dengue, Zika, West Nile and Influenza A viruses (IC50 = 0.5-5.3μM) with high selectivity index. Interestingly, 6i also inhibited SARS-CoV-2 replication in different cell lines, with higher potency on Calu-3 cells that better mimic the SARS-CoV-2 infection in vivo (IC50 = 0.5μM, SI = 240). The multi-target effect of 6i on flavivirus replication was also analyzed in whole cell studies (in vitro selection and immunofluorescence) and against isolated host/viral targets.

Different reactions of this compound(2,6-Dichloropurine)Reference of 2,6-Dichloropurine require different conditions, so the reaction conditions are very important.

Reference:
Oxazolidine – Wikipedia,
Oxazolidine | C3H7NO – PubChem

Reference of Ethyl 3-bromo-2-oxopropanoate. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: Ethyl 3-bromo-2-oxopropanoate, is researched, Molecular C5H7BrO3, CAS is 70-23-5, about Comparative evaluation of the inhibitory potential of synthetic N-heterocycles, Cu/Fe3O4@SiO2 nanocomposites and some natural products against non-resistant and antibiotic-resistant Acinetobacter baumannii. Author is Mardaneh, Jalal; Beyzaei, Hamid; Hashemi, Seyed Hadi; Ghasemi, Behzad; Rahdar, Abbas.

Acinetobacter baumannii is a common infectious agent in hospitals. New antimicrobial agents are identified and prepared to combat these bacterial pathogens. In this context, the blocking potentials of a series of synthesized N-heterocyclic compounds, Cu/Fe3O4@SiO2 nanocomposites, glycine, poly-L-lysine, nisin and hydroalcoholic extracts of Trachyspermum ammi, Curcuma longa and green tea catechins were evaluated against non-resistant and multidrug-resistant strains of A. baumannii. Solutions of heterocyclic derivatives and hydroalcoholic extracts of Trachyspermum ammi, Curcuma longa and green tea catechins were prepared at initial concentration of 10240μg ml-1 in 10% DMSO. Other compounds were dissolved in water at the same concentrations Their in vitro inhibitory activity was assessed by determination of IZD, MIC and MBC values. Glycine, poly-L-lysine, nisin, Curcuma longa and green tea catechins extracts, and thiazoles 3a, 3d and 3f were ineffective at their initial concentrations Heterocyclic derivatives 7a-f, 3c, 3e and 3h, Cu/Fe3O4@SiO2 nanocomposites and Trachyspermum ammi extract could block the growth of bacterial strains with IZDs (7.40-15.51 mm), MICs (32-1024μg ml-1) and MBCs (128-2048μg ml-1). Among synthetic chems. and natural products, the best antimicrobial effects were recorded with (E)-2-(5-acetyl-4-methylthiazol-2-yl)-2-(thiazolidin-2-ylidene)acetonitrile (7b) and the extract of Trachyspermum ammi. It is imperative that their toxic and histopathol. effects were assessed in future researches. It is predicted that the essential oil of Trachyspermum ammi will improve its antibacterial activities.

Different reactions of this compound(Ethyl 3-bromo-2-oxopropanoate)Reference of Ethyl 3-bromo-2-oxopropanoate require different conditions, so the reaction conditions are very important.

Reference:
Oxazolidine – Wikipedia,
Oxazolidine | C3H7NO – PubChem

Computed Properties of C5H7BClNO2. 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: Pyridin-3-ylboronic acid hydrochloride, is researched, Molecular C5H7BClNO2, CAS is 265664-63-9, about Pyridinium boronic acid salts in crystal synthesis. Author is Kara, Hulya; Adams, Christopher J.; Orpen, A. Guy; Podesta, Thomas J..

Salts of pyridinioboronic acids, [HNC5H4B(OH)2-4]2[M(S2C2O2)2]·2H2O (M = Cu 1, Ni 2, Pd 3, Pt 4), [HNC5H4B(OH)2-4]2[Pt(O2C2O2)2] (5); [HNC5H4B(OH)2-3]2 [M(S2C2O2)2] (M = Cu 6, Ni 7, Pd 8, Pt 9) and [HNC5H4B(OH)2-3]2[Pt(O2C2O2)2] (10) were prepared and characterized by x-ray diffraction methods. Salts 2, 3 and 4 are isostructural and isomorphous and contain H-bonded supermols. [pyridinium]2[M(S2C2O2)2] linked by BOH···OB and B(OH)-H2O H bonds into a three-dimensional network. Anhydrous salt 5 has a different structure in which the ions are linked by R(2,2)8 B(OH)2···carboxylate and pyridinium···carboxylate interactions to form a planar H-bonded ribbon. Salts 6, 7, 8 and 10 are all isostructural and isomorphous and contain H-bonded supermols. [pyridinium]2[M(S2C2O2)2] linked by B(OH)2···carboxylate synthons to form a stepped chain. These chains pack in layers superimposed so as to afford short metal···metal contacts of length 3.6-4 Å between layers. The structure of 5 is isomorphous with that of salts 6-8 and 10 but with a different pattern of NH H bonding as a result of the different isomer of pyridinioboronic acid present.

《Pyridinium boronic acid salts in crystal synthesis》 provides a strategy for the preparation of materials with excellent comprehensive properties, which is conducive to broaden the application field of this compound(Pyridin-3-ylboronic acid hydrochloride)Computed Properties of C5H7BClNO2.

Reference:
Oxazolidine – Wikipedia,
Oxazolidine | C3H7NO – PubChem