Tag: M.W:200-300

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 3-(2-Chlorophenyl)-5-isoxazolemethanol( cas:438565-33-4 ) is researched.Electric Literature of C10H8ClNO2.Yin, L.; Jia, J.; Zhao, G. L.; Xu, W. R.; Tang, L. D.; Wang, J. W. published the article 《Design, synthesis and antibacterial activity of novel N-formylhydroxylamine derivatives as PDF inhibitors》 about this compound( cas:438565-33-4 ) in Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry. Keywords: formyl hydroxylamine preparation antibacterial peptide deformylase inhibitor. Let’s learn more about this compound (cas:438565-33-4).

N-formylhydroxylamines RC(NH2):COCH2NHCOCHBuCH2N(OH)CHO (R = substituted Ph) were synthesized through a multi-step protocol starting from H2C(CO2Et)2. The newly synthesized compounds were screened for antibacterial activity. All the compounds exhibited potent in-vitro inhibitory activity against S. aureus and weak activity against K. pneumoniae.

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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method

Formula: C10H8ClNO2. 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: 3-(2-Chlorophenyl)-5-isoxazolemethanol, is researched, Molecular C10H8ClNO2, CAS is 438565-33-4, about Efficient synthesis of bis-isoxazole ethers via 1,3-dipolar cycloaddition catalysed by Zn/Zn2+ and their antifungal activities. Author is Zhang, Da-Wei; Lin, Feng; Li, Bo-Chao; Liu, Hong-Wei; Zhao, Tian-Qi; Zhang, Yu-Min; Gu, Qiang.

A series of novel bis-isoxazole ether compounds I [R = 3-pyridyl, 3-O2NC6H4, 4-O2NC6H4, 4-(H3C)3CC6H4; R1 = 4-C(CH3)3, 3-NO2, (Z)-CH=CHC6H5, etc.] were synthesized starting from different substituted aldehydes RCHO and R1CHO via 1,3-dipolar cycloaddition using Zn/Zn2+ as a catalyst. In addition, the antimicrobial properties of synthesized products were investigated. The synthesized compounds I exhibited significant antifungal activities in comparison with the standard drugs, fluconazole and itraconazole. It was found that Candida albicans was sensitive to 2-substituted Ph bis-isoxazole ethers bearing pyridyl I [R1 = 2-OCH3, 2-Cl].

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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method

Wang, Xi-Zhao; Jia, Jiong; Zhang, Yan; Xu, Wei-Ren; Liu, Wei; Shi, Fang-Niu; Wang, Jian-Wu published the article 《Concise synthesis and antimicrobial activities of new substituted 5-isoxazolpenicillins》. Keywords: isoxazole penicillin derivative preparation antibacterial amidation dipolar cycloaddition.They researched the compound: 3-(2-Chlorophenyl)-5-isoxazolemethanol( cas:438565-33-4 ).Recommanded Product: 3-(2-Chlorophenyl)-5-isoxazolemethanol. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:438565-33-4) here.

The synthesis of a series of penicillin aryl-isoxazole derivatives, such as I [R = Ph, C6H4-4-F, -2-Cl, -4-Cl, -2-Br, -2-OMe, -4-OMe, -3-NO2, -4-NO2, -3-CF3, -4-CF3, C6H3-2,4-Cl2, -3,4-Cl2, C6H2-2,4,5-Cl3, -3,4,5-Cl3, pyridin-2-yl, pyridin-4-yl], were prepared via amidation reactions of the corresponding aryl-substituted isoxazolecarbonyl chlorides with 6-aminopenicillanic acid. Concise large-scale synthesis of the 3,5-disubstituted isoxazoles by 1,3-dipolar cycloaddition reactions of the intermediate aryloximes RCH:NOH with HCCCH2OH using CuSO4.5H2O as catalyst was also investigated. Some of the synthesized compounds were assayed for antimicrobial activities, showing satisfactory antimicrobial activities against Gram-neg. bacteria.

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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method

Wang, Xi-Zhao; Jia, Jiong; Zhang, Yan; Xu, Wei-Ren; Liu, Wei; Shi, Fang-Niu; Wang, Jian-Wu published the article 《Concise synthesis and antimicrobial activities of new substituted 5-isoxazolpenicillins》. Keywords: isoxazole penicillin derivative preparation antibacterial amidation dipolar cycloaddition.They researched the compound: 3-(2-Chlorophenyl)-5-isoxazolemethanol( cas:438565-33-4 ).Recommanded Product: 3-(2-Chlorophenyl)-5-isoxazolemethanol. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:438565-33-4) here.

The synthesis of a series of penicillin aryl-isoxazole derivatives, such as I [R = Ph, C6H4-4-F, -2-Cl, -4-Cl, -2-Br, -2-OMe, -4-OMe, -3-NO2, -4-NO2, -3-CF3, -4-CF3, C6H3-2,4-Cl2, -3,4-Cl2, C6H2-2,4,5-Cl3, -3,4,5-Cl3, pyridin-2-yl, pyridin-4-yl], were prepared via amidation reactions of the corresponding aryl-substituted isoxazolecarbonyl chlorides with 6-aminopenicillanic acid. Concise large-scale synthesis of the 3,5-disubstituted isoxazoles by 1,3-dipolar cycloaddition reactions of the intermediate aryloximes RCH:NOH with HCCCH2OH using CuSO4.5H2O as catalyst was also investigated. Some of the synthesized compounds were assayed for antimicrobial activities, showing satisfactory antimicrobial activities against Gram-neg. bacteria.

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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 3-(2-Chlorophenyl)-5-isoxazolemethanol(SMILESS: OCC1=CC(C2=CC=CC=C2Cl)=NO1,cas:438565-33-4) is researched.SDS of cas: 18436-73-2. The article 《Synthesis of isoxazolines and isoxazoles using poly(ethylene glycol) as support》 in relation to this compound, is published in Synthesis. Let’s take a look at the latest research on this compound (cas:438565-33-4).

A general method for the liquid-phase syntheses of isoxazoles and isoxazolines through a 1,3-dipolar cycloaddition is described. The poly(ethylene glycol) (PEG)-supported alkyne or alkene reacted with nitrile oxides generated in situ from aldoximes, followed by cleavage from the PEG, to give isoxazoles or isoxazolines in good yield and purity.

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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method

Computed Properties of C10H8ClNO2. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 3-(2-Chlorophenyl)-5-isoxazolemethanol, is researched, Molecular C10H8ClNO2, CAS is 438565-33-4, about Synthesis of Isoxazole Moiety Containing Thieno[2,3-d]pyrimidine Derivatives and Preliminarily in vitro Anticancer Activity (Part II). Author is Yong, Jianping; Lu, Canzhong; Wu, Xiaoyuan.

New structures of isoxazole-moiety-containing thieno[2,3-d]pyrimidine derivatives I (R1 = Me, Ph; R2 = H, Me; R3 = H, Ph; R4 = H, 4-Me, 4-MeO, etc.) were synthesized for the first time and their in vitro anticancer activity against lung cancer A549, colorectal HCT116 and breast cancer MCF-7 cell lines was preliminarily evaluated using the MTT method. Most of the compounds exhibited good to excellent anticancer activity. In particular, I (R1 = Me; R2, R3 = H; R4 = Br), I (R1, R3 = Ph; R2 = H; R4 = 4-MeO) and I (R1, R3 = Ph; R2 = H; R4 = 4-Br) exhibited a broad spectrum and more potent anticancer activity against A549, HCT116 and MCF-7 cell lines, which can be regarded as the promising anticancer drug-candidates.

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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method

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: 3-(2-Chlorophenyl)-5-isoxazolemethanol, is researched, Molecular C10H8ClNO2, CAS is 438565-33-4, about Efficient solvent-free synthesis of bis(indolyl)methanes on SiO2 solid support under microwave irradiation.COA of Formula: C10H8ClNO2.

An efficient synthesis of bis(indolyl)methanes I (R1 = C6H5, 3-pyridinyl, 4-CH3C6H4, etc.) was developed. Bis(indolyl)methanes were synthesized starting from various aromatic aldehydes with indole under microwave irradiation and solvent-free conditions (85-98%). Solid support SiO2 was found to possess favorable catalytic and dispersancy parameters for the condensation reaction. Moreover, novel bis(indolyl)methanes containing an isoxazole ring II (R2 = H, t-Bu, 4-Cl, etc.) were synthesized via this method in excellent yields (> 94%) using 3-substituted isoxazole-5-carbaldehydes and indole.

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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method

Reference of 3-(2-Chlorophenyl)-5-isoxazolemethanol. 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: 3-(2-Chlorophenyl)-5-isoxazolemethanol, is researched, Molecular C10H8ClNO2, CAS is 438565-33-4, about Design, Ultrasonic-assisted Synthesis and Evaluation In vitro Antimicrobial Activity of Bis-isoxazole Derivatives Bearing Chloro-pyridinyl Group. Author is Feng, Fan; Li, Jing; Zhang, Zhihui; Fu, Jiaxu; Zhang, Yumin; Gu, Qiang.

An ultrasonic-assisted synthesis of bis-isoxazole derivatives was developed. Eight 3-(6-chloropyridin-3-yl)-5-{[(3-arylisoxazol-5-yl)methoxy]methyl}isoxazoles I [R1 = H, 4-Me, 2-Cl, etc.] were synthesized by 1,3-dipolar cycloaddition reaction between substituted isoxazolyl alkyne compounds and 6-chloro-N-hydroxynicotinimidoyl chloride. The structures of the synthesized compounds were confirmed by HRMS, FTIR, 1H and 13C NMR spectroscopy. Wherein, the antifungal and antibacterial activities of target compounds were tested. The synthesized compounds I [R1 = 2-methoxy, 2-Cl] exhibited better antifungal activity in comparison with the standard drug itraconazole. The min. inhibitory concentrations(MICs) of compound I [R1 = 2-methoxy, 2-Cl] were both 4μg/mL against Candida albicans ATCC 10231.

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Reference:
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method

Application of 14323-43-4, Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics.In a document type is Article, and a compound is mentioned, 14323-43-4, Dichlorodiamminepalladium, introducing its new discovery.

The catalytic oxidation of sulfides selectively to sulfoxides and/or sulfones is realised for the first time with heterogeneous tungstate-exchanged Mg-Al-LDH catalyst using 30% hydrogen peroxide in aqueous media at a faster rate in quantitative yields at room temperature. The heterogeneous catalyst showed higher activity (TOF) over its homogeneous analogues and other heterogeneous catalysts reported so far. The catalyst is well characterised by various instrumental techniques such as FT-IR spectroscopy, thermal analysis (TGA and DTA), powder XRD and chemical analysis. The catalyst is reused for six cycles with consistent activity and selectivity.

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Reference：
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method

In heterogeneous catalysis, the catalyst is in a different phase from the reactants. Product Details of 14323-43-4, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 14323-43-4, name is Dichlorodiamminepalladium. In an article，Which mentioned a new discovery about 14323-43-4

A complex moiety containing VO(IV) was anchored covalently into organic-modified Si-MCM-41 to prepare a new catalyst. The prepared materials were characterized using various techniques. Several types of aromatic and aliphatic sulfides were successfully oxidized to the corresponding sulfoxides in good to excellent yields using H2O2 in the presence of a catalytic amount of the catalyst under solvent-free conditions. The results showed that the OH groups of the various compounds such as 2,2-(phenylthio)ethanol and 2-(methylthio)ethanol remained intact under similar conditions. Meanwhile the catalyst was stable in the reaction system, and could be reused at least four times without significant loss of its activity and chemoselectivity.

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Reference：
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method