Heterocyclic Building Blocks-Benzisoxazole

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.Yang, Min; Chen, Jing; He, Chen; Hu, Xin; Ding, Yechun; Kuang, Ying; Liu, Jinbiao; Huang, Qitong researched the compound: Methyl 2,4-dichloronicotinate( cas:442903-28-8 ).Formula: C7H5Cl2NO2.They published the article 《Palladium-Catalyzed C-4 Selective Coupling of 2,4-Dichloropyridines and Synthesis of Pyridine-Based Dyes for Live-Cell Imaging》 about this compound( cas:442903-28-8 ) in Journal of Organic Chemistry. Keywords: palladium catalyst coupling dichloropyridine boronic ester toxicity cell imaging; pyridine dye palladium catalyst coupling dichloropyridine boronic ester. We’ll tell you more about this compound (cas:442903-28-8).

An alternative process of Pd-catalyzed C-4 selective coupling of 2,4-dichloropyridines with boronic esters was developed, which afforded 24 examples of C-4 coupled pyridines in moderate to good yields. After further arylation, 21 examples of C-2, C-4 diarylated pyridines with a significant photophys. property were obtained, which were applied as pyridine-based dyes into live-cell imaging with good biocompatibility and low toxicity.

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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 Facile synthesis, characterization, nucleic acid interaction and photoluminescent properties of (E)-furan-2-yl(2-(2-hydroxybenzylidene)hydrazinyl) methaniminium and its Mn(II), Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) complexes, published in 2019-02-15, which mentions a compound: 3326-71-4, Name is 2-Furoic hydrazide, Molecular C5H6N2O2, Formula: C5H6N2O2.

The present work describes the synthesis of novel (E)-furan-2-yl(2-(2-hydroxybenzylidene)hydrazinyl) methaniminium in water/methanol(3:1) mixture, water acting as catalyst and also solvent to expedite reaction rate with high yield. In which, amine exchange and condensation reaction takes place between N-salicylidene aniline and furanoic acid hydrazide at one step. The structural characterization of prepared ligand was carried out by single crystal x-ray diffraction, elemental anal. and spectroscopy (UV-visible, FTIR and NMR) techniques. The single crystal x-ray diffraction result indicates that the ligand crystallizes in orthorhombic system with Pca21 space group. Further, Mn(II), Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) complexes of ligand were prepared Complexes were analyzed by elemental anal., magnetic susceptibility and spectroscopy (UV-visible, FTIR and ESR) studies. The DNA binding studies of synthesized compounds were carried out and results suggest that, ligand L and its transition metal complexes 1-6 were binding to CT-DNA through intercalation. It was confirmed by intrinsic binding constant value in the order of 106 M-1. The fluorescence properties of ligand L and its metal complexes 1-6 were investigated; ligand showed broad emission spectra in the visible region and its metal complexes exhibited emission spectra in the blue to red.

Here is just a brief introduction to this compound(3326-71-4)Formula: C5H6N2O2, more information about the compound(2-Furoic hydrazide) is in the article, you can click the link below.

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 《Reactions of furan compounds. IV. High-temperature decomposition of the vapors of tetrahydrofuronitrile and Me tetrahydrofuroate to give 2,3-dihydrofuran and cyclopropanealdehyde》. Authors are Wilson, Christopher L..The article about the compound:Methyl tetrahydrofuran-2-carboxylatecas:37443-42-8,SMILESS:O=C(C1OCCC1)OC).Quality Control of Methyl tetrahydrofuran-2-carboxylate. Through the article, more information about this compound (cas:37443-42-8) is conveyed.

Tetrahydrofuramide (I) is not dehydrated by COCl2 at high temperatures At 360-400° over silica gel, I gives a mixture of tetrahydrofuronitrile (II) and 2,3-dihydrofuran (III), together with some HCN; the yield of II at 290° was 74%, at 310° 55%, and at 330° 40% (yields are based on consumption, see Part III); over Na phosphate (pumice impregnated with 120 g. NaH2PO4 and 15 cc. H3PO4 in 85 cc. H2O and dried by heating slowly to 300°) at 400° the yield of II was 90%, consumption of I 50-85%. With N as carrier gas (2 l./hr.), 70% of II was recovered when passed over earthenware rings at 450°; 10% was impure III. Silica gel at 500° gives 20% of tetrahydrofuran (IV)-III mixture (48% of III), 10% of unchanged II and 10% of a compound (V), which may be CH2.CH2.C:CHCN, b. 130-40°. Na phosphate at 500° gives HCN, only a little III + IV and mainly cyclopropanecarboxaldehyde (VI), b14 42-4°; 2,4-dinitrophenylhydrazone, orange-red, m. 173-5°; p-nitrophenylhydrazone, golden-yellow, m. 129-32°; dimedon derivative, m. 160-2°. NH4 tetrahydrofuroate (aqueous solution containing an excess of NH3) over earthenware rings gives an equimol. mixture of the free acid and I; over silica gel at 500-600° V and II were formed; over Na phosphate, the temperature and carrier gas (N, CO2) appeared to have little influence on the results; between 450-550° there resulted 20-30% of a product b. 45-90° containing MeOH, III, and VI; over silica gel at 375°, the products were III and PrCHO (2,4-dinitrophenylhydrazone, orange-brown, m. 120-5°); at 400°, the ester gives 30% of a liquid containing some III and VI. VI was prepared in about 20% yield from Cl(CH2)3CN and SnCl2 in ether (saturated with HCl).

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Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: Methyl tetrahydrofuran-2-carboxylate, is researched, Molecular C6H10O3, CAS is 37443-42-8, about A scalable chemoenzymic preparation of (R)-tetrahydrofuran-2-carboxylic acid, the main research direction is chemoenzymic asym preparation tetrahydrofurancarboxylic acid; protease asym preparation tetrahydrofurancarboxylic acid.COA of Formula: C6H10O3.

To develop a practical scalable approach to (R)-tetrahydrofuran-2-carboxylic acid (I), a chiral building block for furopenem, enantioselective hydrolysis of its esters is explored: When Et (±)-tetrahydrofuran-2-carboxylate (II, 2 M, 288 g/L) is digested by an Aspergillus melleus protease {0.2% (w/v)} in a 1.5 M potassium phosphate buffer (pH 8) for 20 h, enantioselective hydrolysis proceeds with E = 60 to give I in 94.4% ee. On separation from the leftover antipodal (S)-II by partition, I is treated with dicyclohexylamine in Me Et ketone/methanol (5:1) to precipitate the crystalline salt that contains I of >99% ee in 22% overall yield from II.

Here is just a brief introduction to this compound(37443-42-8)COA of Formula: C6H10O3, more information about the compound(Methyl tetrahydrofuran-2-carboxylate) is in the article, you can click the link below.

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

Product Details of 610-09-3. 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: cis-Cyclohexane-1,2-dicarboxylic acid, is researched, Molecular C8H12O4, CAS is 610-09-3, about Fractal to monolayer growth of AgCl and Ag/AgCl nanoparticles on vanadium oxides (VOx) for visible-light photocatalysis. Author is Sharma, Mukesh; Das, Biraj; Sarmah, Jugal Charan; Hazarika, Anil; Deka, Biplab K.; Park, Young-Bin; Bania, Kusum K..

A facile and simple methodol. was adopted for the trapping of highly crystalline AgCl and Ag/AgCl nanoparticles (NPs) into the interlayer spacings of vanadium oxides (VOx). Self-organization of AgCl and Ag/AgCl-NPs on VOx was found to be governed by the nature of the dicarboxylic acids used during the synthesis of the nanocomposites. A “”fractals-like”” morphol. of the AgCl@VOx nanocomposite was achieved in the presence of cis-1,2 cyclohexanedicarboxylic acid. Heating of the AgCl@VOx nanocomposite above 68 °C resulted in the growth of polydispersed and ultrafine (3-4 nm) Ag/AgCl-NPs and its self-organization into monolayer formation on a partly crystalline VOx matrix. Change in the conformation of the dicarboxylic acid to the trans-isomer resulted in the formation of a ‘rod-like’ structure of Ag/AgCl-NPs on a highly crystalline VOx matrix. The band gaps of the nanocomposites were within the range of 1.8 to 2.9 eV. Because of such a low band gap, the synthesized nanocomposites were found to be highly active toward the photooxidation of methylene (MB) and methyl orange (MO) under sunlight.

Here is just a brief introduction to this compound(610-09-3)Product Details of 610-09-3, more information about the compound(cis-Cyclohexane-1,2-dicarboxylic acid) is in the article, you can click the link below.

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

Lee, Yu Jin; Kim, Eun Young; Kim, Soo Hyun; Jang, Seung Pyo; Lee, Tae Geum; Kim, Cheal; Kim, Sung-Jin; Kim, Youngmee published an article about the compound: cis-Cyclohexane-1,2-dicarboxylic acid( cas:610-09-3,SMILESS:O=C([C@H]1[C@@H](C(O)=O)CCCC1)O ).Application of 610-09-3. 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:610-09-3) through the article.

Six ZnII-(e,a-cis-1,2-chdc) complexes, [Zn2(1,2-chdc)2(2,2′-bpy)2(H2O)2]·H2O (1), [{Zn2(1,2-chdc)2(H2O)2(μ-bpa)}·4H2O]n (2), [{Zn2(μ-1,2-chdc)2(μ-4,4′-bpy)}·2CH3OH]n (3), [{Zn2(μ-1,2-chdc)2(μ-bpe)}·2H2O]n (4), [[{Zn2(μ-1,2-chdc)2}n-(μ-bpp)2-{Zn2(μ-1,2-hdc)2(H2O)2}]·CH3CN·2H2O]n (5), and [{Zn(μ-dtp)(μ-1,2-chdc)}2·4·5H2O]n (6) (1,2-chdc = 1,2-cyclohexanedicarboxylate), with different assistant ligands (2,2′-bipyridine (2,2′-bpy), 1,2-bis(4-pyridyl)ethane (bpa), 1,2-bis(4-pyridyl)ethylene (bpe), 1,3-bis(4-pyridyl)propane (bpp), and, 4,4′-bipyridine (4,4′-bpy) and 4,4′-dithiodipyridine (dtp)) were synthesized and their structures were determined Depending on the assistant ligands, the structures and dimensionalities of ZnII-(e,a-cis-1,2-chdc) complexes were varied. Two carboxylates in e,a-cis-1,2-chdc coordinate to ZnII ions with (11) or (10) connectivity. Photoluminescence study of the compounds 1-6 showed that emission spectra of compounds 1, 2, 4, and 5 were observed at 343 nm for 1, 419 nm for 2, 507 nm for 4, 396 nm for 5, resp., while no obvious luminescences were displayed for 3 and 6. Compound 1 catalyzed the transesterification reaction of Ph acetate with methanol, with quant. conversion to Me acetate, under the neutral conditions, while compounds 2-6 showed very slow conversions. The thermal stabilities of these complexes were also examined

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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 《Stereochemistry of cyclic compounds. 1,3-Cyclopentenedione in Diels-Alder reaction》. Authors are Kucherov, V. F.; Ivanova, L. I..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).COA of Formula: C8H12O4. Through the article, more information about this compound (cas:610-09-3) is conveyed.

Oxidation of 1,3-cyclopentenediol with CrO3 in AcOH with ice cooling gave 26% 1,3-cyclopentenedione (I), b1 60°, n20D 1.5045, m. 35-6°, after cooling. The dione condenses readily with butadiene in C6H6 (pyrogallol added) in 2 weeks at room temperature to yield cis-Δ5-hexahydroindene-1,3-dione, m. 157.5-8.5°; hydrogenation over Pd gave 1,3-hydrindandione, m. 86-6.5°, which with Br2-NaOH gave cis-1,2-cyclohexanedicarboxylic acid, m. 186.5-7.5°. I condensed with isoprene in C6H6 to the adduct, 5-methyl-Δ5-hexahydroindene-1,3-dione, m. 84.5-5.5°. Cyclopentadiene gave the adduct, C10H10O2, m. 178-8.5°, which hydrogenated over Pd to endomethylenehydrindan-1,3-dione, m. 166-6.5°. I and 1-vinylcyclohexene gave the adduct, 4,5-tetramethylene-Δ5-hexahydroindene-1,3-dione, m. 120-1°. I and 6-methoxy-1-vinyl-Δ3,4-dihydronaphthalene similarly gave in 1 day at room temperature II, m. 206.5-7.5°.

Here is just a brief introduction to this compound(610-09-3)COA of Formula: C8H12O4, more information about the compound(cis-Cyclohexane-1,2-dicarboxylic acid) is in the article, you can click the link below.

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

Benedetti, Ettore; Pedone, Carlo; Allegra, Giuseppe published an article about the compound: cis-Cyclohexane-1,2-dicarboxylic acid( cas:610-09-3,SMILESS:O=C([C@H]1[C@@H](C(O)=O)CCCC1)O ).Synthetic Route of C8H12O4. 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:610-09-3) through the article.

C8H12O4, crystallizes in the triclinic system, space group P1 , with a = 6.93, b = 10.95, c = 6.38 Å, α = 108°3′, β = 114°51′, γ = 90°16′, and Z = 2. The structure has been solved by joint application of the symbolic addition procedure and the method based on the maximum probability described by Allegra and Valle, which maximizes the II(s1, s2, s3,…) function. The structure has been refined to an R factor of 0.056 for 1505 independent reflections measured by counter techniques (Cu Kα). One of the two carboxyl groups is in the axial, the other in the equatorial position relative to the cyclohexane ring. The observed conformation of this mol. is compared with that recently given for the trans isomer.

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

Application In Synthesis of 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 A new fluorescent chemosensor for Al(III) detection with highly selective in aqueous solution and solid test paper. Author is Xiu, Deping; Shi, Junjie; Deng, Miaoran; Song, Huihua; Hao, Zhiqiang; Feng, Qi; Yu, Haitao.

A new fluorescent chemosensor (I) based on salicylaldehyde hydrazide was facilely synthesized through one-step reaction, which exhibited turn-on fluorescent response to Al(III) with 18-fold fluorescence enhancement in aqueous solution at pH 5.5. The binding stoichiometry of 1 toward Al(III) was in 1:1. High selectivity and sensitivity to Al(III) were achieved, which featured a detection limit of 67 nmol L-1 and a linear rang of 1-10 μmol L-1. More importantly, the sensing process could be also performed on solid test paper. After the addition of Al(III), a significant emission color change from yellow to cyan was observed by naked eye due to the intrinsic aggregation-induced emission (AIE) characteristic of 1.

Here is just a brief introduction to this compound(3326-71-4)Application In Synthesis of 2-Furoic hydrazide, more information about the compound(2-Furoic hydrazide) is in the article, you can click the link below.

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Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

Application of 3326-71-4. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 2-Furoic hydrazide, is researched, Molecular C5H6N2O2, CAS is 3326-71-4, about Systematic approach of chromone skeleton for detecting Mg2+, ion: Applications for sustainable cytotoxicity and cell imaging possibilities. Author is Yadav, Neetu; Kumar, Raj; Singh, Ashok Kumar; Mohiyuddin, Shanid; Gopinath, P..

The systematic studies of chromone appended novel chemosensors, favored to Mg2+ ion detection, these were analyzed and characterized by different spectroscopic techniques such as NMR, mass spectroscopy, FTIR and optical techniques. The binding demeanor of the ligands was executed with the library of metal ions and shown the good coordination with Mg2+ ion to the ligand′s cavity. Both ligands demonstrated good binding behavior with Mg2+ ion. The ligands represented 1: 1 stoichiometry with Mg2+ ions through Job′s plot. The low limit of detection of Mg2+ ion was determined as 2.56 × 10-6 and 1.28 × 10-6 for La and Lb, resp. No interference was occurred in Inference study by foreign metal ions that supported the specific detection of Mg2+ ion among the other metal ions. Further, the cytotoxicity assay test of these chromone appended ligands revealed that both ligands and their resp. compound with Mg2+ ion shown negligible toxicity with HeLa cancer cell line. Further, due to the fluorescence properties of the ligands, with or without Mg2+ ion was successfully tested in bioimaging experiment of HeLa cancer cell lines and found that ligands with Mg2+ ions represented good imaging with HeLa cancer cell.

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