Tag: M.W:200-300

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: 5-Iodo-2-furaldehyde, is researched, Molecular C5H3IO2, CAS is 2689-65-8, about Formation of α-chiral centers by asymmetric β-C(sp3)-H arylation, alkenylation, and alkynylation.Product Details of 2689-65-8.

The enzymic β-C-H hydroxylation of the feedstock chem. isobutyric acid has enabled the asym. synthesis of a wide variety of polyketides. The analogous transition metal-catalyzed enantioselective β-C-H functionalization of isobutyric acid-derived substrates should provide a versatile method for constructing useful building blocks with enantioenriched α-chiral centers from this abundant C-4 skeleton. However, the desymmetrization of ubiquitous iso-Pr moieties by organometallic catalysts has remained an unanswered challenge. Herein, the authors report the design of chiral mono-protected aminomethyl oxazoline ligands that enable desymmetrization of iso-Pr groups via palladium insertion into the C(sp3)-H bonds of one of the prochiral Me groups. We detail the enantioselective β-arylation, -alkenylation, and -alkynylation of isobutyric acid/2-aminoisobutyric acid derivatives, which may serve as a platform for the construction of α-chiral centers.

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Reference:
1,8-Naphthyridine – Wikipedia,
1,8-Naphthyridine | C8H6N2 – PubChem

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 5-Iodo-2-furaldehyde, is researched, Molecular C5H3IO2, CAS is 2689-65-8, about Photochemical reactivity of halofuran and halothiophene derivatives with benzimidazole, the main research direction is iodofuran benzimidazole photochem coupling; iodothiophene benzimidazole photochem coupling; benzimidazolylthiophene; benzimidazolylfuran; thiophene benzimidazolyl; furan benzimidazolyl.HPLC of Formula: 2689-65-8.

A photochem. approach to the synthesis of 5-(4-benzimidazolyl)-2-thiophenes, e.g., I (X = S, R = H, Me) and 5-(4-benzimidazolyl)-2-furan I (X = O, R = H) by the irradiation of benzimidazole with iodothiophenes II (X = S, R = H, Me) and iodofuran II (X = O, R = H) in MeCN is described.

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Reference:
1,8-Naphthyridine – Wikipedia,
1,8-Naphthyridine | C8H6N2 – PubChem

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-Bromo-1-(1-methyl-1H-pyrrol-2-yl)ethanone, is researched, Molecular C7H8BrNO, CAS is 65438-97-3, about Electrochemical diselenylation of indolizines via intermolecular C-Se formation with 2-methylpyridines, α-bromoketones and diselenides.Application of 65438-97-3.

2-Methylpyridines, aryl bromomethyl ketones, and diselenides underwent electrochem. three-component cyclocondensation and selenylation reactions mediated by KI and K2CO3 in aqueous DMF to yield diselenylindolizines such as I [R = Ph, 4-R1C6H4, 3-R2C6H4, 2-FC6H4, 2,4-Cl2C6H3, 3,4-Cl2C6H3, 3,4-(MeO)2C6H3, 2-naphthyl, 1,3-benzodioxol-5-yl, 2-dibenzofuranyl, 1-methyl-2-pyrrolyl; R1 = Me, MeO, i-Bu, F, Cl, Br, I, F3C, Ph, PhCH2O, MeSO2; R2 = Me, MeO, Cl, Br].

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1,8-Naphthyridine – Wikipedia,
1,8-Naphthyridine | C8H6N2 – PubChem

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 2-Bromo-1-(1-methyl-1H-pyrrol-2-yl)ethanone(SMILESS: CN1C(C(CBr)=O)=CC=C1,cas:65438-97-3) is researched.Application of 65438-97-3. The article 《4-Acetylamino-3-(imidazol-1-yl)-benzoic acids as novel inhibitors of influenza sialidase》 in relation to this compound, is published in European Journal of Medicinal Chemistry. Let’s take a look at the latest research on this compound (cas:65438-97-3).

Two methods for the synthesis of 4-acetylaminobenzoic acids substituted at the 3-position with imidazoles are described. Thus, 4-acetylamino-3-aminobenzoic acid tert-Bu ester was N-alkylated with RCH2COBr (R = Ph, Et, benzofuran-3-yl, etc.) followed by cyclization with cyanamide and hydrolysis to give imidazolylbenzoic acids I (R1 = Ph, furyl, Et, etc.; R2 = NH2). Imidazolylbenzoic acids I (R1 = H; R2 = NH2, H, Et) were prepared by addition of the appropriate imidazole to 3-fluoro-4-nitrobenzoic acid tert-Bu ester followed by reduction of the nitro group, acetylation, and hydrolysis. Many of the compounds are inhibitors of influenza virus sialidases with levels of activity similar to the recently described 4-acetylamino-3-guanidino-benzoic acid (BANA 113).

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1,8-Naphthyridine – Wikipedia,
1,8-Naphthyridine | C8H6N2 – PubChem

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 2689-65-8, is researched, Molecular C5H3IO2, about Palladium-catalyzed synthesis of 4-heteroaryl and 4-alkynyl-substituted sydnones. 5-Oxido-3-phenyl-1,2,3-oxadiazol-3-ium-4-ylzinc chloride, the main research direction is palladium catalyzed coupling oxidophenyloxadiazoliumylcopper heteroaryl iodide; alkynyl bromide palladium catalyzed coupling oxidophenyloxadiazoliumylcopper; oxidophenyloxadiazoliumylzinc chloride preparation reactivity; sydnone heteroaryl alkynyl.COA of Formula: C5H3IO2.

A general method is suggested for the synthesis of 4-heteroaryl- and 4-alkynyl-3-Ph sydnones by palladium(0)-catalyzed cross-coupling of 5-oxido-3-phenyl-1,2,3-oxadiazol-3-ium-4-ylcopper (I, R = Cu) with heteroaryl iodides and alkynyl bromides. Thus, I (R = H) was treated sequentially with BuLi, CuBr, and then 2-iodopyridine and Pd(PPh3)4 in THF-C6H6 to give 85% I (R = 2-pyridyl). 5-Oxido-3-phenyl-1,2,3-oxadiazol-3-ium-4-ylzinc chloride (I, R = ZnCl) was synthesized and found to be significantly less reactive than I (R = Cu) and was successfully coupled only with p-iodonitrobenzene and β-bromostyrene.

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Reference:
1,8-Naphthyridine – Wikipedia,
1,8-Naphthyridine | C8H6N2 – PubChem

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 2689-65-8, is researched, Molecular C5H3IO2, about Evaluation of the reactivity of furfural and products of its oxidation with hydrogen peroxide, the main research direction is oxidation furfural kinetics energy; substituent oxidation kinetics furfural.Related Products of 2689-65-8.

Energy levels were calculated (MO) for furan and furfural; energies of formation in each stage of the oxidation of furfural by H2O2 were also calculated Rate constants of oxidation of I increased in the order R = NO2, iodo, Br, H, Cl, Me, Me2N.

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Formula: C5H3IO2. 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: 5-Iodo-2-furaldehyde, is researched, Molecular C5H3IO2, CAS is 2689-65-8, about Synthesis of new heterocyclic compounds based on N-benzyl(heptyl)-3-benzyl(heptyl)amino-4-hydroxybutanamides. Author is Tlekhusezh, M. A.; Badovskaya, L. A.; Tyukhteneva, Z. I..

The reactions of HOCH2CH(NHR)CH2CONHR (R = benzyl, heptyl) with 5-iodofurfural, Cl3CCOOEt, SOCl2, and di-Et oxalate were examined The products included oxazolidines I and II (R = benzyl, heptyl), oxathiazolidine oxide III, and morpholinediones IV (same R). I and III showed antibacterial and antifungal activity.

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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.Zhi, Man-Ling; Chen, Bing-Zhi; Deng, Wei; Chu, Xue-Qiang; Loh, Teck-Peng; Shen, Zhi-Liang researched the compound: 5-Iodo-2-furaldehyde( cas:2689-65-8 ).Recommanded Product: 5-Iodo-2-furaldehyde.They published the article 《Preparation of Alkyl Indium Reagents by Iodine-Catalyzed Direct Indium Insertion and Their Applications in Cross-Coupling Reactions》 about this compound( cas:2689-65-8 ) in Journal of Organic Chemistry. Keywords: alkylindium reagent generation coupling iodoarene; arene preparation; metalation iodoalkane bromoalkane indium iodine catalyst coupling iodoarene bromoarene. We’ll tell you more about this compound (cas:2689-65-8).

Alkylindium reagents were generated in situ by direct metalation of primary alkyl iodides and bromides and cyclohexyl iodide with indium metal in the presence of iodine in THF (for alkyl iodides) or N,N-dimethylacetamide (for alkyl bromides). Palladium-catalyzed coupling of the alkylindium reagents with aryl iodides and selected aryl bromides and chlorides yielded arenes.

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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Synthesis of iodo derivatives of the furan series. 5-Iodofurfural》. Authors are Nazarova, Z. N..The article about the compound:5-Iodo-2-furaldehydecas:2689-65-8,SMILESS:IC1=CC=C(O1)C=O).Recommanded Product: 5-Iodo-2-furaldehyde. Through the article, more information about this compound (cas:2689-65-8) is conveyed.

All 5-bromo or -iodo derivatives of furan lose halogen quantitatively on standing 48 hrs. in the dark in HNO3 (d. 1.4) in the presence of AgNO3, followed by heating to 50-60° until N oxide vapor appear; the method can be used for analysis of these compounds Refluxing 35 g. 5-bromofurfural with 35 g. KI and 180 ml. AcOH 1 hr., followed by dilution with H2O gave 96% crude product, m. 124-6°, which gave 80% pure 5-iodofurfural, m. 127.5-8° (from EtOH); with HNO3 it gives vapor of iodine; oxime, decompose 167-8°; semicarbazone, decompose 199-200°. The aldehyde in 30% NaOH treated with a few drops H2O2 and kept 4 days, then acidified, gave 58.8% 5-iodofurancarboxylic acid, decompose 197-8° (from H2O). The aldehyde heated with Ac2O-AcOK at 145-50°, then boiled with a little H2O 15 min. gave 82.2% 5-iodo-2-furylacrylic acid, decompose 159-60° (from dilute dioxane). The aldehyde condensed with MeNO2 (cf. C.A. 49, 9606b) gave 86% 1-(5-iodo-2-furyl)-2-nitroethylene (I), yellow-orange, m. 112-13° (from EtOH); if the intermediately formed Na salt is filtered directly from the mixture and is carefully decomposed with AcOH after washing with Et2O and MeOH, there is formed the unstable nitro alc., orange-red oil, which after steam distillation gave 80% I, m. 112-13°. The Br analog heated with KI and NaI in AcOH 2 hrs. on a steam bath gave 82.6% I. Heating 2-(5-bromo-2-furyl)-1-chloro-1-nitroethylene (cf. loc. cit.) with NaI in AcOH 2 hrs. gave 48.2% 5-iodo analog, C6H3BrCINO3, m. 109-9.5° (from EtOH), an irritant which loses iodine on heating with HNO3.

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The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 5-Iodo-2-furaldehyde, is researched, Molecular C5H3IO2, CAS is 2689-65-8, about Palladium-catalyzed synthesis of 4-heteroaryl and 4-alkynyl-substituted sydnones. 5-Oxido-3-phenyl-1,2,3-oxadiazol-3-ium-4-ylzinc chloride, the main research direction is palladium catalyzed coupling oxidophenyloxadiazoliumylcopper heteroaryl iodide; alkynyl bromide palladium catalyzed coupling oxidophenyloxadiazoliumylcopper; oxidophenyloxadiazoliumylzinc chloride preparation reactivity; sydnone heteroaryl alkynyl.COA of Formula: C5H3IO2.

A general method is suggested for the synthesis of 4-heteroaryl- and 4-alkynyl-3-Ph sydnones by palladium(0)-catalyzed cross-coupling of 5-oxido-3-phenyl-1,2,3-oxadiazol-3-ium-4-ylcopper (I, R = Cu) with heteroaryl iodides and alkynyl bromides. Thus, I (R = H) was treated sequentially with BuLi, CuBr, and then 2-iodopyridine and Pd(PPh3)4 in THF-C6H6 to give 85% I (R = 2-pyridyl). 5-Oxido-3-phenyl-1,2,3-oxadiazol-3-ium-4-ylzinc chloride (I, R = ZnCl) was synthesized and found to be significantly less reactive than I (R = Cu) and was successfully coupled only with p-iodonitrobenzene and β-bromostyrene.

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1,8-Naphthyridine – Wikipedia,
1,8-Naphthyridine | C8H6N2 – PubChem