Day: April 7, 2022

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.Electric Literature of C5H6N2O2.Chalenko, N.; Demchenko, A.; Syrova, G. published the article 《Synthesis of potential antiexudative preparations for 2-((4-amino-5-(furan-2-yl)-1,2,4-triazole-(4h)-3-yl)-sulfanyl)-N-acetamide series》 about this compound( cas:3326-71-4 ) in ScienceRise: Pharmaceutical Science. Keywords: antiexudative antiinflammatory analgesic. Let’s learn more about this compound (cas:3326-71-4).

The aim of the study was to synthesize new potential biol. active substances of derivatives of 2-((4-amino-5-(furan-2-yl)-1,2,4-triazole(4H)-3-yl)-sulfanyl)-N acetamides and determination of their structure, physico-chem. properties and anti-exudative activity (AEA). Reactions were started with furan-2-carboxylic acid hydrazide with carbon disulfide in Et alc. in the presence of potassium hydroxide to form potassium dithiocarbazinate intermediate, followed by cyclical condensation with excess hydrazine, yielding tiotriazole (1) as a white solid with a good yield. Twenty-one new compounds were synthesized in the series of derivatives of 2-((4-amino-5-(furan-2-yl)-4H-1,2,4-triazol-3-yl) sulfanyl)-N-acetamides, their phys. and chem. characteristics have been established. The structure of the synthesized compounds is confirmed by data from elemental anal., 1H NMR spectra and chromatog. mass spectrometry. Fifteen compounds have shown antiexudative activity, among the leaders were identified seven compounds: 3.1, 3.2, 3.5, 3.9, 3.11, 3.12, 3.19, which significantly suppressed swelling by 81.5 %; 61.1 %; 70.3 %; 55.5 %; 62.9 %; 53.0 %, resp., and significantly exceeded the activity of sodium diclofenac (44 %).

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

Electric Literature of C5H6N2O2. 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 Ruthenium-Catalyzed Three-Component Alkylation: A Tandem Approach to the Synthesis of Nonsymmetric N,N-Dialkyl Acyl Hydrazides with Alcohols. Author is Bettoni, Leo; Joly, Nicolas; Lohier, Jean-Francois; Gaillard, Sylvain; Poater, Albert; Renaud, Jean-Luc.

The borrowing hydrogen strategy has been applied in the synthesis of nonsym. N,N-dialkylated acyl hydrazides via a tandem three-component reaction catalyzed by a phosphine free diaminocyclopentadienone ruthenium tricarbonyl complex. This strategy represents the first direct one-pot approach to nonsym. functionalized acyl hydrazides. Different aromatic acyl hydrazides underwent dialkylation with a variety of primary or secondary alcs. and methanol or ethanol as alkylating agents in mild reaction conditions and good yields. Deuterium labeling experiments suggested that the primary or secondary alc. was the hydrogen source in this tandem process. DFT calculations show that the combination of the tandem mixed product cannot be perfectly explained neither structurally nor electronically, but might be dependent of the phys. state of the aldehyde or ketone intermediate (gaz vs. liquid) at the reaction temperature

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

Reference 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 2-Hydroxy-1-naphthaldehyde Schiff Base for Turn-on Fluorescence Detection of Zn2+ Based on PET Mechanism. Author is Mu, Xinyue; Shi, Liping; Yan, Liqiang; Tang, Ningli.

Zinc ion is closely related to human health. Its content in human body is small, while the effect is large. However, it is not the more the better, must be in a scientific balance. Therefore, it is significant to the rapid detection of Zn2+ in the environment and organism. Herein, a fluorescent probe based on 2-hydroxy-1-naphthalene formaldehyde and furan-2-carbohydrazide was conveniently synthesized via Schiff base reaction. And this probe has been successfully applied to the accurate and quant. detection of Zn2+ in real samples, showing turn on fluorescence, good selectivity, very low detection limit, real time response and reusability. In addition, this probe has the potential application to trace Zn2+ in living cells with low cytotoxicity.

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Reference:
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: cis-Cyclohexane-1,2-dicarboxylic acid( cas:610-09-3 ) is researched.Product Details of 610-09-3.Yang, Ying; Wu, Rui; Huang, Shaohua; Bai, Zhengwu published the article 《Silica sol assisted chromatographic NMR spectroscopy for resolution of trans- and cis-isomers》 about this compound( cas:610-09-3 ) in Journal of Magnetic Resonance. Keywords: silica soluble cisisomer transisomer chromatog NMR resolution; Chromatographic NMR spectroscopy; DOSY; Isomer; Resolution; Silica sol. Let’s learn more about this compound (cas:610-09-3).

Chromatog. NMR spectroscopy can seperate the mixtures of species with significantly different mol. size, but generally fails for isomeric species. Herein, we reported the resolution of trans- and cis-isomers and their structural analog, which are different in mol. shapes, but similar in mass, were greatly enhanced in the presence of silica soluble The mixtures of maleic acid, fumaric acid and succinic acid, and the mixtures of trans- and cis-1,2-cyclohexanedicarboxylic acids, were distinguished by virtue of their different degrees of interaction with silica soluble Moreover, we found mixed solvents could improve the spectral resolution of DOSY spectra of mixtures

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

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: 2-Furoic hydrazide, is researched, Molecular C5H6N2O2, CAS is 3326-71-4, about Ruthenium-Catalyzed Three-Component Alkylation: A Tandem Approach to the Synthesis of Nonsymmetric N,N-Dialkyl Acyl Hydrazides with Alcohols.Reference of 2-Furoic hydrazide.

The borrowing hydrogen strategy has been applied in the synthesis of nonsym. N,N-dialkylated acyl hydrazides via a tandem three-component reaction catalyzed by a phosphine free diaminocyclopentadienone ruthenium tricarbonyl complex. This strategy represents the first direct one-pot approach to nonsym. functionalized acyl hydrazides. Different aromatic acyl hydrazides underwent dialkylation with a variety of primary or secondary alcs. and methanol or ethanol as alkylating agents in mild reaction conditions and good yields. Deuterium labeling experiments suggested that the primary or secondary alc. was the hydrogen source in this tandem process. DFT calculations show that the combination of the tandem mixed product cannot be perfectly explained neither structurally nor electronically, but might be dependent of the phys. state of the aldehyde or ketone intermediate (gaz vs. liquid) at the reaction temperature

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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).COA of Formula: C8H12O4. 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

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Methyl tetrahydrofuran-2-carboxylate( cas:37443-42-8 ) is researched.Name: Methyl tetrahydrofuran-2-carboxylate.Uyanik, Muhammet; Hayashi, Hiroki; Iwata, Hirokazu; Ishihara, Kazuaki published the article 《Chiral ammonium hypoiodite salt-catalyzed enantioselective oxidative cycloetherification to 2-acyl tetrahydrofurans》 about this compound( cas:37443-42-8 ) in Chemistry Letters. Keywords: acyl THF preparation enantioselective green chem; phenylimidazolyl hydroxyketone chiral ammonium hypoiodite salt catalyst oxidative cycloetherification. Let’s learn more about this compound (cas:37443-42-8).

Chiral quaternary ammonium hypoiodite salt-catalyzed enantioselective oxidative cycloetherification of δ-hydroxyketone derivs was achieved . The corresponding 2-acyl tetrahydrofurans were obtained in high chem. yield with high enantioselectivity.

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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 《Stereoisomeric biologically active compounds. I. Some conversions of cis-4-chloro-4-cyclohexene-1,2-dicarboxylic acid》. Authors are Rashidyan, L. G.; Tatevosyan, G. T..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).Safety of cis-Cyclohexane-1,2-dicarboxylic acid. Through the article, more information about this compound (cas:610-09-3) is conveyed.

cf. Baeyer, Ann. Chem. 258, 215(1890); U.S. 1,967,862, CA 28, 5994. To 10 g. cis-4-chloro-4-cyclohexene-1,2-dicarboxylic acid (I) and 60 ml. H2O, under cooling and stirring, a solution of 21 g. KMnO4 in 650 650 ml. H2O was added over 3 hrs. The cooling and stirring was another 2 hrs. and the mixture left standing overnight, yielding meso-butane-1,2,3,4-tetracarboxylic acid m. 191-2°. I (204.5 g.) and 15 ml. concentrated H2SO4 in 500 ml. absolute MeOH was refluxed for 8 hrs. Dimethyl cis-4-chloro-4-cyclohexene-1,2-dicarboxylate (II), b5 148-50°, d204 1.0553, n20D 1.4935 was obtained in 71.3% yield. II (20 g.) and 18 ml. 85% H2NNH2 was refluxed for 3 hrs. Trans-4-chloro-4-cyclohexene-1,2-dicarboxylic acid dihydrazide (III) m. 222-4° (60% EtOH) was obtained in 69.5% yield. To 30 g. III in 105 ml. 10% HCl and 280 ml. CH2Cl2 at 18-20°, a solution of 20.8 g. NaNO3 in 48.5 ml. H2O was slowly added. The nonaqueous layer was dried, filtered, and treated with 160 ml. absolute EtOH. The CH2Cl2 was evaporated, the mixture refluxed for 2 hrs., 210 ml. 40% NaOH added and steam distilled The distillate was acidified with 10% HCl giving the trans-4-chloro-1,2-diamino-4-cyclohexene-2HCl m. 326-8° in 72.1% yield. III (38 g.) and a solution of 26.6 g. NaOH in 350 ml. H2O was refluxed for 12 hrs. and acidified, giving trans-4-chloro-4-cyclohexene-1,2-dicarboxylic acid (IV) m. 115-17° (H2O) in 89.8% yield. IV (10 g.) was oxidized with KMnO4 as described above, giving the dianhydride of dl-butane-1,2,3,4-tetracarboxylic acid m. 172-3°. A solution of 21 g. IV, 8 g. NaOH and 70 ml. H2O was hydrogenated in an autoclave in the presence of 35 g. Ni on Cr2O3 at 100° and 100 atm. The solution was filtered and acidified giving trans-cyclohexane-1,2-dicarboxylic acid (V) m. 220° (Me2O) in 78.2% yield. I (60 g.) and 23.5 g. NaOH in 200 ml. H2O was hydrogenated as described above giving cis-cyclohexane-1,2-dicarboxylic acid (VI), m. 192°, in 92.1% yield. A mixture of 8 g. VI and 20 ml. concentrated HCl was heated in a sealed tube at 180° for 8-10 hrs. and V, m. 220-1°, was obtained in 88.8% yield.

From this literature《Stereoisomeric biologically active compounds. I. Some conversions of cis-4-chloro-4-cyclohexene-1,2-dicarboxylic acid》,we know some information about this compound(610-09-3)Safety of cis-Cyclohexane-1,2-dicarboxylic acid, but this is not all information, there are many literatures related to this compound(610-09-3).

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

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 Design, Synthesis, and Antifungal Activity of Novel Longifolene-Derived Diacylhydrazine Compounds.

Succinate dehydrogenase (SDH) present in the inner mitochondrial membrane is an important target enzyme for the design of SDH inhibitor-type fungicides. Using SDH as the target enzyme, 22 novel longifolene-derived diacylhydrazine compounds were designed and synthesized using the renewable natural product longifolene as the starting material. Their structures were confirmed by IR, 1H NMR, 13C NMR, electrospray mass spectrometry, and elemental anal. In vitro antifungal activity of the target compounds was preliminarily evaluated. As a result, some of them showed better or comparable antifungal activity than that of the com. fungicide chlorothalonil, in which compound I had inhibitory rates of 97.5, 80.5, 72.1, and 67.1% against Physalospora piricola, Colletotrichum orbiculare, Alternaria solani, and Gibberella zeae, resp., presenting excellent and broad-spectrum activity that deserved further study. Besides, a reasonable and effective three-dimensional structure-activity quant. relationship model has been established. There was a significant pos. correlation between the antifungal activity and the docking-based binding energy analyzed using Spearman’s rank correlation algorithm. Also, the simulative binding pattern of the target compounds with SDH was investigated by mol. docking study. Furthermore, the diacylhydrazine and phenol groups of the target compounds were proposed to be the potential pharmacophores by frontier MO anal.

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Reference:
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: Methyl tetrahydrofuran-2-carboxylate( cas:37443-42-8 ) is researched.Quality Control of Methyl tetrahydrofuran-2-carboxylate.Kong, Xiao-Lin; Yang, Li-Ping; Xu, Tian-Ming published the article 《Synthesis of N-(2-tetrahydrofuroyl)piperazine》 about this compound( cas:37443-42-8 ) in Zhongguo Yiyao Gongye Zazhi. Keywords: hydrofuroylpiperazine preparation. Let’s learn more about this compound (cas:37443-42-8).

Title compound I (R = 1-piperazyl) was prepared with 61% yield from condensation of I (R = OCH3), prepared from H2/Ni reduction of 2-methoxycarbonylfuran, with piperazine·6H2O in the presence of NH4Br under reflux for 6 h.

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