Day: April 11, 2022

Recommanded Product: 2-Furoic hydrazide. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 2-Furoic hydrazide, is researched, Molecular C5H6N2O2, CAS is 3326-71-4, about Synthesis, crystal structures, and characterization of three zinc complexs with different acylhydrazone-type schiff base ligands. Author is Xie, Qing-fan; Chen, Yan-min.

Three zinc complexes, namely [Zn(Lss)(phen)(DMF)] (1), {[Zn (HLdis)]2·2CH3OH}n (2) and [Zn(Baf)2]·CH3OH (3), formed from different acylhydrazone-type Schiff base ligands were synthesized by using different methods, and the compounds were characterized by IR, UV-Vis spectra and TGA. The X-ray diffraction analyses revealed that 1 and 3 crystallized in the triclinic space group P1̅ while 2 in monoclinic system space group P21/n. In 1 and 3, coordination number of the Zn (II) was six, and the centric atom located in a distorted octahedron geometry, while in 2 Zn (II) was five-coordination in a distorted square-pyramidal geometry. The precursor of 3 was pyrazoline derivative with the formula C15H14N2O3 (Pzl) crystallizing in monoclinic system space group P21/c. Due to the coordination of Zn (II) causing the intramol. rearrangement of Pzl, the ring open product HBaf in the form of an acylhydrazone structure coordinated with Zn (II) to form complex 3.

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

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Hexathydro-o-phthalic acids》. Authors are Vavon, G.; Peignier, P..The article about the compound:cis-Cyclohexane-1,2-dicarboxylic acidcas:610-09-3,SMILESS:O=C([C@H]1[C@@H](C(O)=O)CCCC1)O).Quality Control of cis-Cyclohexane-1,2-dicarboxylic acid. Through the article, more information about this compound (cas:610-09-3) is conveyed.

Hydrogenation of mono-Me o-phthalate with Pt black as catalyst gives cis-hexahydrophthalate (I). The l-rotatory isomer of I (m. 148-9°, [α573 6.67°, c 0.1 in EtOH) gives on saponification an inactive acid. The l-rotatory cis-hexahydrophthalamide ([α]573 -15.4°, c 0.02 in EtOH), isolated by means of the quinine salt, gives on heating an inactive imide.

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

Name: 2-Furoic hydrazide. 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: 2-Furoic hydrazide, is researched, Molecular C5H6N2O2, CAS is 3326-71-4, about Synthesis of acylhydrazone based fluorescent probe for Al (III) and its property. Author is Long, Zhao-xian; Jiang, Guang-qi.

An acylhydrazone based fluorescent probe was synthesized by two-step reaction with tetrakis(bromomethyl) benzene and 2,4-dihyoxybenzaldehyde as raw materials. The compound showed excellent selectivity for Al3+ in the V(DMSO):V (H2O) = 19:1 solution, showing remarkable fluorescence enhancement effects towards Al3+ at the emission wavelength of 446 nm. The stoichiometry of 1:2 of the Al (III) complexes was determined by Job’s plots, 1HNMR titration experiments and LC-MS anal. The spectroscopic titration indicated that the detection limits of the probe for Al3+ were 1.16 × 10-7 mol/L and the complexing constant of the probe to Al3+ was 2.28 × 10-3 L/mol. Furthermore, the probe can be used for the determination of Al3+ in the river water and tap water samples.

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

Computed Properties of C6H10O3. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Methyl tetrahydrofuran-2-carboxylate, is researched, Molecular C6H10O3, CAS is 37443-42-8, about Selective hydrogenolysis of 2-furancarboxylic acid to 5-hydroxyvaleric acid derivatives over supported platinum catalysts. Author is Asano, Takehiro; Takagi, Hiroshi; Nakagawa, Yoshinao; Tamura, Masazumi; Tomishige, Keiichi.

The conversion of 2-furancarboxylic acid (FCA), which is produced by oxidation of furfural, to 5-hydroxyvaleric acid (5-HVA) and its ester/lactone derivatives with H2 was investigated. Monometallic Pt catalysts were effective, and other noble metals were not effective due to the formation of ring-hydrogenation products. Supports and solvents had a small effect on the performance; however, Pt/Al2O3 was the best catalyst and short chain alcs. such as methanol were better solvents. The optimum reaction temperature was about 373 K, and at higher temperature the catalyst was drastically deactivated by deposition of organic materials on the catalyst. The highest yield of target products (5-HVA, δ-valerolactone (DVL), and Me 5-hydroxyvalerate) was 62%, mainly obtained as Me 5-hydroxyvalerate (55% yield). The byproducts were mainly ring-hydrogenation compounds (tetrahydrofuran-2-carboxylic acid and its ester) and undetected ones (loss of carbon balance). The catalyst was gradually deactivated during reuses even at a reaction temperature of 373 K; however, the catalytic activity was recovered by calcination at 573 K. The reactions of various related substrates were carried out, and it was found that the O-C bond in the O-C=C structure (1,2,3-position of the furan ring) is dissociated before C=C hydrogenation while the presence and position of the carboxyl group (or methoxy carbonyl group) much affect the reactivity.

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

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 3326-71-4, is researched, SMILESS is O=C(C1=CC=CO1)NN, Molecular C5H6N2O2Journal, Article, Luminescence called A highly selective aggregation-induced emission fluorogen for sensitive detection of Al3+ in living cells, Author is Xie, Ya; Li, Xueming; Yan, Liqiang; Li, Jianping, the main research direction is A549 cell aggregation induced emission fluorogen aluminum; AIE; Al3+; Schiff’s base; coumarin; fluorescence probe.Reference of 2-Furoic hydrazide.

A Schiff’s base derivative was synthesized using a condensation reaction between 8-formyl-7-hydroxy-4-methylcoumarin and furan-2-carbohydrazide that produced marked aggregation-induced emission and had excellent ability to specifically recognize aluminum ions (Al3+). This compound displayed faint fluorescence in the benign solvent DMF, and exhibited obvious green fluorescence following addition of specific amounts of water. Moreover, it exhibited strong blue fluorescence after combination with Al3+ even in the presence of other interfering ions. These exptl. results demonstrated that this derivative could be used as a fluorescence probe for Al3+. The advantages, including significant fluorescence change, high selectivity and sensitivity, and fast response, meant that this probe could be used both to detect Al3+ in water samples and for fluorescence imaging in living cells.

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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, Article, Organic Letters called Palladium-Catalyzed Site-Selective Amidation of Dichloroazines, Author is Young, Ian S.; Glass, Anna-Lena; Cravillion, Theresa; Han, Chong; Zhang, Haiming; Gosselin, Francis, which mentions a compound: 442903-28-8, SMILESS is ClC1=C(C(=O)OC)C(=CC=N1)Cl, Molecular C7H5Cl2NO2, Recommanded Product: Methyl 2,4-dichloronicotinate.

A highly site-selective amidation reaction of substituted 2,4-dichloroazines is reported. Palladium acetate/1,1′-bis(diphenylphosphino)ferrocene (dppf) was identified as the optimal catalyst system, producing >99:1 C-2/C-4 selectivity for most examples. The generality of this transformation was demonstrated through a survey of a diverse amide/substituted 2,4-dichloroazine scope, leading to the preparation of the desired C-2 amidated products in good to excellent yields.

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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 Synthesis, antimicrobial and antioxidant evaluation, and molecular docking study of 4,5-disubstituted 1,2,4-triazole-3-thiones, published in 2020-09-05, which mentions a compound: 3326-71-4, Name is 2-Furoic hydrazide, Molecular C5H6N2O2, Category: benzisoxazole.

In order to develop potential antimicrobial agents, some 1,2,4-triazole-3-thiones I (R = Et, Ph, 4-nitrophenyl, etc.; Ar = Ph, furan-2-yl, pyridin-4-yl, etc.) were synthesized from the reaction of hydrazides ArC(O)NHNH2 with isothiocyanates RN=C=S under optimized conditions in deep eutectic solvent of potassium carbonate-glycerol (1:5 M ratio). Blocking properties of all products were assessed on a variety of Gram-pos. and Gram-neg. bacterial as well as fungal pathogens. Good to excellent inhibitory effects especially against fungi were observed with all synthesized compounds Compound I (R = 4-nitrophenyl; Ar = 4-hydroxyphenyl) showed significant antioxidant activity according to the results obtained from 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging experiments The possible interaction mechanism of synthetic triazoles with 1IYL enzyme on Aspergillus fumigatus was investigated by mol. docking method. A complete agreement was found between exptl. data and theor. calculations Hydrogen bond acceptor strength of N-1 in 1,2,4-triazole rings was the main cause of the observed differences.

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

Li, Tian-Xiao; Ji, Ling-Bo; Jiang, Zhong-Rong; Geng, Zong-Ze; Shentu, Hong-Qian; Liu, Min-Chang; Xie, Yun-Fei; Hu, Jun; Liu, Yuan-Fa; Li, Dong-Liang published an article about the compound: 2-Furoic hydrazide( cas:3326-71-4,SMILESS:O=C(C1=CC=CO1)NN ).Reference of 2-Furoic hydrazide. 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.

In this study, the type I caramel reactions of the glucose-water system were carried out. The glucose caramel products (GCPs) at different reaction stages were collected and the reaction rate, UV absorption, flavor compound, and the antioxidant and antibacterial activities were determined The result showed that the glucose reaction rate of the GCP yielded at 180°C and 4 min arrived at the stable range of around 80.0%. For UV absorptions of GCPs at 305 nm increased approx. in the exponential order. Moreover, the GCP yielded at 180°C and 4 min was revealed to have the highest concentration of main flavor compounds and potent antioxidant and antibacterial activities.

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

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Kolbe electrolyses of cis- and trans-methyl hydrogen hexahydrophthalate》. Authors are Overberger, C. G.; Kabasakalian, Peter.The article about the compound:cis-Cyclohexane-1,2-dicarboxylic acidcas:610-09-3,SMILESS:O=C([C@H]1[C@@H](C(O)=O)CCCC1)O).Recommanded Product: cis-Cyclohexane-1,2-dicarboxylic acid. Through the article, more information about this compound (cas:610-09-3) is conveyed.

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

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《A simple fluorescent probe for selective detection of Al3+ based on furan Schiff base and its crystal structure》. Authors are Peng, Hua-nan; Liu, Yi-qing; Huang, Jia-qi; Huang, Shou-Shun; Cai, Xin-ping; Xu, Shu-juan; Huang, Ai; Zeng, Qiang; Xu, Miao.The article about the compound:2-Furoic hydrazidecas:3326-71-4,SMILESS:O=C(C1=CC=CO1)NN).Synthetic Route of C5H6N2O2. Through the article, more information about this compound (cas:3326-71-4) is conveyed.

A simple “”turn-on”” fluorescent probe L was synthesized by condensation of furan-2-carbohydrazide and 2-hydroxy-4-methoxybenzaldehyde, and its structure was confirmed by single crystal X-ray diffraction. The probe L exhibited excellent selectivity towards Al3+ over other coexistent metal ions with remarkable fluorescence enhancement, accompanied by color change from colorless to blue. Moreover, the probe L showed high sensitivity to Al3+ with low detection limit (3.10 x 10-8 M) in the pH range of 3.0-8.0. The possible sensing mechanisms of L toward Al3+ were determined by Job plots experiments, high resolution mass spectrometry (HRMS), 1H NMR spectra and the d. functional theory (DFT) calculations Addnl., the probe L was successfully applied for detection of Al3+ in water samples with satisfactory results.

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