Tag: M.W:100-200

Recommanded Product: 2-Furoic hydrazide. 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: 2-Furoic hydrazide, is researched, Molecular C5H6N2O2, CAS is 3326-71-4, about Synthesis and anticancer activity of new ((furan-2-yl)-1,3,4-thiadiazolyl)-1,3,4-oxadiazole acyclic sugar derivatives.

New sugar hydrazones incorporating furan and/or 1,3,4-thiadiazole ring systems I (R1 = (S,S,R,R)-HOCH2(CHOH)3CH(OH) (A), (R,R,R)-HOCH2(CHOH)2CH(OH)) were synthesized by reaction of the corresponding hydrazide II with different aldose sugars. Heterocyclization of the formed hydrazones I afforded the derived acyclic nucleoside analogs III (R2 = (S,S,R,R)-HOCH2(CHOC(O)CH3)3CH(OH), (R,R,R)-H3C(O)COCH2(CHOC(O)CH3)2CH(OH)) possessing the 1,3,4-oxadiazoline as modified nucleobase via acetylation followed by the heterocyclization process. The anticancer activity of the synthesized compounds was studied against human liver carcinoma cell (HepG-2) and at human normal retina pigmented epithelium cells (RPE-1). High activities were revealed by compounds 4-(2-(furan-2-carbony!)hydrazinyl)-4-oxobutanoyl chloride, IV and (A) with IC50 values near to that of the reference drug doxorubicin.

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Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

Ishihara, Kazuaki; Nakagawa, Shoko; Sakakura, Akira published an article about the compound: Methyl tetrahydrofuran-2-carboxylate( cas:37443-42-8,SMILESS:O=C(C1OCCC1)OC ).Application of 37443-42-8. 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:37443-42-8) through the article.

More environmentally benign alternatives to current chem. processes, especially large-scale, fundamental reactions such as ester condensations, are highly desirable for many reactions. Bulky diarylammonium pentafluorobenzenesulfonates and tosylates serve as extremely active dehydration catalysts for the ester condensation reaction of carboxylic acids with equimolar amounts of sterically demanding alcs. and acid-sensitive alcs. Typically, the esterification reaction is performed in heptane by heating at 80 °C in the presence of 1 mol % of the catalyst without removing water. Esterification with primary alcs. proceeds without solvents even at room temperature Furthermore, 4-(N-mesitylamino)polystyrene resin-bound pentafluorobenzenesulfonate can be recycled more than 10 times without activity loss.

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Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 2-Furoic hydrazide( cas:3326-71-4 ) is researched.Recommanded Product: 3326-71-4.Mhaidat, I.; Taha, Z. A.; Al Momani, W.; Hijazi, A. K. published the article 《Photoconductivity, Antioxidant, and Antimicrobial Activities of Some Acenaphthenequinone Derivatives》 about this compound( cas:3326-71-4 ) in Russian Journal of General Chemistry. Keywords: acenaphthenequinone preparation antibacterial antioxidant activity photoconductivity. Let’s learn more about this compound (cas:3326-71-4).

Photoconductive acenaphthenequinone derivatives I (R = thiophen-2-yl, 3-hydroxynaphthalen-2-yl, pyridin-4-yl, etc.) have been synthesized by a one-pot process of acenaphthenequinone with different aromatic hydrazides RC(O)NHNH2. Photoelectrochem. (PEC) measurements reveal that the compounds demonstrate photoresponse upon illumination by light of intensities 1000 and 10000 W/m2. The photoconductivity behavior of the derivatives I is enhanced in the presence of electron donor groups attached to the aromatic ring. Thereby, these products may be used in material devices as organic thin film transistors, on/off sensors, etc. The antioxidant activity of the products has been tested by DPPH radical scavenging method in vitro, indicating their significant potential. Antimicrobial activity of the derivatives I has been estimated by min. inhibitory concentration (MIC, mg/mL) using the micro-broth dilution method. The compounds are moderately active against some Gram pos. bacteria and Candida albicans and completely inactive against Gram neg. bacteria tested.

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Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: cis-Cyclohexane-1,2-dicarboxylic acid(SMILESS: O=C([C@H]1[C@@H](C(O)=O)CCCC1)O,cas:610-09-3) is researched.SDS of cas: 75732-01-3. The article 《Ionization equilibria in dicarboxylic acids undergoing conformational transitions》 in relation to this compound, is published in Journal of Physical Chemistry. Let’s take a look at the latest research on this compound (cas:610-09-3).

Succinic acid and substituted succinic acids undergo conformational transitions during ionization, and these are expected to affect their ionization equilibrium The 1H NMR data on the dependence of the conformational equilibrium of succinic acid and meso-2,3-dimethylsuccinic acid on their degree of ionization are interpreted in terms of the ratio of the 2nd ionization constants of the gauche and trans isomer, K2g/K2t, and the equilibrium constant Kc for the gauche-trans transition of the unionized acid. The K2g/K2t ratios obtained for the 2 above acids are compared with theratio of the 2nd ionization constants of cis- and trans-cyclohexane-1,2-dicarboxylic acids used as model compounds in which the carboxyls are gauche and trans to each other.

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Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

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 Comparison of aromatic and aliphatic dicarboxylic acid in reactivity using hydrogen-isotope exchange reaction in a gas-solid system, published in 1994, which mentions a compound: 610-09-3, mainly applied to hydrogen exchange carboxylic acid kinetics; LFER hydrogen exchange carboxylic acid, Recommanded Product: 610-09-3.

The hydrogen-isotope exchange reaction between aromatic (alicyclic, or normal chain aliphatic) dicarboxylic acid (solid) and HTO vapor was observed at 40 °C ∼ 80° to reveal the reactivity of the material having the same two functional groups. The A””-McKay plot method was used to determine its rate constant From the rate constants thus determined, the following three findings have been clarified in the reaction. (1) The reactivity of aromatic dicarboxylic acid is similar to that of normal chain aliphatic dicarboxylic acid, and is greater than that of alicyclic acid. (2) With regard to 1,2- or 1,4-cyclohexanedicarboxylic acid, cis-isomer is similar to trans-isomer in reactivity. (3) The reactivity of isophthalic acid is larger than that of benzoic acid, and seems to follow the Hammett LFER.

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Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

Application In Synthesis of 2-Furoic hydrazide. 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: 2-Furoic hydrazide, is researched, Molecular C5H6N2O2, CAS is 3326-71-4, about Electrochemical Synthesis of 2,5-Disubstituted 1,3,4-Oxadiazoles from α-Keto Acids and Acylhydrazines Under Mild Conditions. Author is Lu, Fangling; Gong, Fengping; Li, Liangsen; Zhang, Kan; Li, Zhen; Zhang, Xinwei; Yin, Ying; Wang, Ying; Gao, Ziwei; Zhang, Heng; Lei, Aiwen.

1,3,4-Oxadiazoles are a kind of useful heterocycles which can be frequently found in materials and bioactive mols. In this study, intermol. electrochem. cyclization between α-keto acids and acylhydrazines has been developed for the synthesis of 2,5-disubstituted 1,3,4-oxadiazoles with the yield up to 91% [e.g., benzohydrazide + 2-oxo-2-phenylacetic acid → 2,5-diphenyl-1,3,4-oxadiazole (90%)]. This transformation can be run under mild reaction conditions in the absence of external oxidant, base and transition metal catalyst. Both sym. and unsym. 2,5-disubstituted 1,3,4-oxadiazoles could be prepared according to the careful choice of the substrate combination. Gram scale synthesis also illustrates the potential application of this protocol in large preparation

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Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

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 Kolbe electrolyses of cis- and trans-methyl hydrogen hexahydrophthalate, published in 1956, which mentions a compound: 610-09-3, Name is cis-Cyclohexane-1,2-dicarboxylic acid, Molecular C8H12O4, HPLC of Formula: 610-09-3.

The Kolbe electrolysis of cis- and trans-Me H hexahydrophthalate (I) in anhydrous MeOH has been carried out. Identical mixtures of uncoupled products were obtained from both isomers. Me 1-cyclohexene- and 2-cyclohexene-1-carboxylate and Me cyclohexanecarboxylate were obtained as monomeric products. Dimeric materials were obtained for the first time from I. Saponification of the dimeric ester mixture gave 2 perhydrodiphenic acids, trans-anti-trans and trans-syn-trans, which were separated and identified quantitatively by adsorption chromatography and infrared analysis. Since epimerization occurred on all centers α to the carboxyl group, no conclusion about the stereochemistry of the radicals could be deduced from the ratios of coupled products.

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Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

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, Azerbaidzhanskii Khimicheskii Zhurnal called Stereochemistry of cyclic dicarboxylic acids studies by potentiometric titration. IV. Effect of the composition and dielectric constant of acetone-water solutions on the ionization constants of cis- and trans-1,2-dicarboxylic acids, Author is Salakhov, M. S.; Israfilov, A. I.; Shamilov, T. O., which mentions a compound: 610-09-3, SMILESS is O=C([C@H]1[C@@H](C(O)=O)CCCC1)O, Molecular C8H12O4, Computed Properties of C8H12O4.

Ionization constants of cis and trans isomers of 1,2-cyclohexanedicarboxylic acid, 4-cyclohexene-1,2-dicarboxylic acid, 1-methyl-4-cyclohexene-1,2-dicarboxylic acid, 5-norbornene-2,3-dicarboxylic acid, and 1,2,3,4,9,9-hexachloro-1,4,4a,5,6,7,8,8a-octahydro-1,4-methanonaphthalene-2,3-dicarboxylic acid, cis-3-methyl-4-cyclohexene-1,2-dicarboxylic acid, and cis-4,5-dimethyl-4-cyclohexene-1,2-dicarboxylic acid were determined and correlated with configuration and solvent composition

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Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 2-Furoic hydrazide, is researched, Molecular C5H6N2O2, CAS is 3326-71-4, about Phosphine-Free Ruthenium Complex-Catalyzed Synthesis of Mono- or Dialkylated Aryl Hydrazides via the Borrowing Hydrogen Strategy, the main research direction is aryl hydrazide alkylation alc ruthenium catalyst.Formula: C5H6N2O2.

A diaminocyclopentadienone ruthenium tricarbonyl complex-catalyzed synthesis of mono- or dialkylated aryl hydrazides from N-unsubstituted aryl hydrazides and various substituted primary and secondary alcs. as alkylating reagents using the borrowing hydrogen strategy has been developed. Deuterium labeling experiments confirmed that the alcs. are the hydride source in this cascade process. D. functional theory (DFT) calculations unveiled the origin and the threshold between the mono- and dialkylation.

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Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

Singh, Dharmender; Tiwari, Sandip Kumar; Singh, Virender published an article about the compound: 2-Furoic hydrazide( cas:3326-71-4,SMILESS:O=C(C1=CC=CO1)NN ).HPLC of Formula: 3326-71-4. 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:3326-71-4) through the article.

An efficient protocol were developed for one-pot synthesis of biol. interesting β-carboline substituted 1,3,4-oxadiazoles via an I2-assisted oxidative C-O bond formation strategy. This metal-free sequential approach was found to be compatible with diversely substituted 1-formyl β-carbolines and aromatic as well as aliphatic hydrazides, providing access to a variety of multifunctional β-carboline linked 1,3,4-oxadiazole derivatives in good to excellent yields. The methodol. was found to be applicable to gram scale synthesis of β-carboline substituted 1,3,4-oxadiazole derivatives Addnl., β-carboline C1 linked 2-amino-1,3,4-oxadiazoles and bis-1,3,4-oxadiazoles were also synthesized using the same strategy.

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Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics