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Safety of 5-Iodo-2-furaldehyde. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 5-Iodo-2-furaldehyde, is researched, Molecular C5H3IO2, CAS is 2689-65-8, about Comparative study by mass spectrometry of the fragmentation of 5-substituted furfurals. Author is Lauzardo, N.; Mocelo, R.; Padron, G.; Buttner, J.; Fanghaner, F..

A comparative study on the fragmentation of a series of 5-substituted furfurals (X = H, CH3, Cl, Br, I, NO2, COOCH3, COOH) was made. Depending on the nature of the substituent, 2 main pathways of fragmentation were observed One of them starts with the fragmentation of the aldehyde group (X = H, CH3, Cl, Br, I). The other starts with the fragmentation of substituents (X = NO2, COOCH3, COOH). The spectra are discussed on the basis of these 2 fragmentation pathways.

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

Zubkov, Fedor I.; Nikitina, Eugenia V.; Galeev, Timur R.; Zaytsev, Vladimir P.; Khrustalev, Victor N.; Novikov, Roman A.; Orlova, Daria N.; Varlamov, Alexey V. published an article about the compound: 5-Iodo-2-furaldehyde( cas:2689-65-8,SMILESS:IC1=CC=C(O1)C=O ).Reference of 5-Iodo-2-furaldehyde. 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:2689-65-8) through the article.

An efficient and versatile one-pot synthesis of 3,6a-epoxyisoindoles annelated with oxazine, oxazole, thiazine, thiazole, pyrimidine fragments and with their benzoannelated analogs is presented. The method is based on tandem N-acylation/intramol. cycloaddition (the intramol. Diels-Alder reaction of furan, IMDAF) reaction between α,β-unsaturated acid anhydrides and α-furyl substituted azaheterocycles. The latter can be easily prepared by condensation of diverse furfurals and 1,2- or 1,3-N,X-binucleophiles (aminoalcs., aminothiols, diamines). The observed IMDAF reaction is stereoselective: exo-adducts are formed exclusively with large prevalence of one of the diastereoisomers. In most cases, the condensation/N-acylation/IMDAF reaction sequence may be carried out via a one-pot domino protocol. The scope and limitations of the proposed approach are thoroughly investigated. The obtained Diels-Alder adducts are attractive and useful substrates for further transformations. Fused isoindoles can be prepared from them in one-step by aromatization of the 7-oxabicyclo[2.2.1]heptene ring. Other transformations, including halogenation, ring cleavage, and Wagner-Meerwein skeletal rearrangement, are also demonstrated. The spatial structures of the obtained compounds have been established by X-ray diffraction analyses.

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

HPLC of Formula: 2689-65-8. 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: 5-Iodo-2-furaldehyde, is researched, Molecular C5H3IO2, CAS is 2689-65-8, about Thermographic study of the reaction of primary aryl amines with 5-halofurfurals.

Thermograms of the reaction of 5-halofurfural with primary aryl amines were studied. The 1st macrostage corresponded to the formation of 5-halofurfurylidenearyl amines, the 2nd stage to N-[5-arylaminofurfurylidene]arylamine. Effect of substitutes in amine and aldehyde components on the 1st and the 2nd reaction stages was comparatively analyzed from the thermogram data.

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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: 5-Iodo-2-furaldehyde(SMILESS: IC1=CC=C(O1)C=O,cas:2689-65-8) is researched.HPLC of Formula: 2689-65-8. The article 《Palladium-catalyzed synthesis of 4-heteroaryl and 4-alkynyl-substituted sydnones. 5-Oxido-3-phenyl-1,2,3-oxadiazol-3-ium-4-ylzinc chloride》 in relation to this compound, is published in Mendeleev Communications. Let’s take a look at the latest research on this compound (cas:2689-65-8).

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

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 5-Iodo-2-furaldehyde(SMILESS: IC1=CC=C(O1)C=O,cas:2689-65-8) is researched.Reference of 6-Hydroxy-1,2,3,4-tetrahydroisoquinoline-1-carboxylic acid. The article 《Study of the first harmonic of the carbonyl stretching vibration of furfural and 5-substituted derivatives》 in relation to this compound, is published in Revista CENIC, Ciencias Fisicas. Let’s take a look at the latest research on this compound (cas:2689-65-8).

The solvent effect on the frequencies of the 1st harmonic of the CO group stretching vibrations in furfural and its 5-NO2, 5-Br, 5-I, 5-Me, or 5-Me2N derivatives was examined The transitions were assigned to the 00 cis and 00 trans rotamers. The 5-substituent affected the CO stretch analogously to the effects of p-substituents on the CO stretch in BzH; the rotamer CO stretching frequencies showed a LFER with σp.

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

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 5-Iodo-2-furaldehyde( cas:2689-65-8 ) is researched.Electric Literature of C5H3IO2.Lauzardo, N.; Mocelo, R.; Padron, G.; Buttner, J.; Fanghaner, F. published the article 《Comparative study by mass spectrometry of the fragmentation of 5-substituted furfurals》 about this compound( cas:2689-65-8 ) in Ciencias, Serie 3: Quimica. Keywords: furfural fragmentation mass spectra; methylfurfural fragmentation pathway; chlorofurfural fragmentation pathway; bromofurfural fragmentation pathway; iodofurfural fragmentation pathway; nitrofurfural fragmentation pathway; carbomethoxyfurfural fragmentation pathway; carboxyfurfural fragmentation pathway; substituent furfural mass spectra. Let’s learn more about this compound (cas:2689-65-8).

A comparative study on the fragmentation of a series of 5-substituted furfurals (X = H, CH3, Cl, Br, I, NO2, COOCH3, COOH) was made. Depending on the nature of the substituent, 2 main pathways of fragmentation were observed One of them starts with the fragmentation of the aldehyde group (X = H, CH3, Cl, Br, I). The other starts with the fragmentation of substituents (X = NO2, COOCH3, COOH). The spectra are discussed on the basis of these 2 fragmentation pathways.

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

Related Products of 2689-65-8. 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 Thermographic study of the reaction of primary aryl amines with 5-halofurfurals. Author is Tovmas’yan, I. K.; Lyutkin, N. I.; Myasnikova, T. P..

Thermograms of the reaction of 5-halofurfural with primary aryl amines were studied. The 1st macrostage corresponded to the formation of 5-halofurfurylidenearyl amines, the 2nd stage to N-[5-arylaminofurfurylidene]arylamine. Effect of substitutes in amine and aldehyde components on the 1st and the 2nd reaction stages was comparatively analyzed from the thermogram data.

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

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Catalytic hydrogenation of coumarone》. Authors are Shuikin, N. I.; Dmitriev, I. I.; Dobrynina, T. P..The article about the compound:5-Iodo-2-furaldehydecas:2689-65-8,SMILESS:IC1=CC=C(O1)C=O).Related Products of 2689-65-8. Through the article, more information about this compound (cas:2689-65-8) is conveyed.

Hydrogenation of coumarone (I) was carried on by the method and with the catalysts previously described (C. A. 33, 1316.1-2). Under all the conditions used the reaction is accompanied by partial cleavage of the furan ring and the formation of 2-ethylcyclohexanol (II) and β-cyclohexylethyl alc. (III). Passing I with H over Pd deposited on asbestos at 175° formed up to 80% octahydrocoumarone (IV), II and some III. In a similar reaction with the Ni catalyst the yield of II was increased to about 50% and that of IV reduced to 21-2%. The liquid-phase hydrogenation of I in EtOH at 20-50° and atm. pressure in the presence of Pt black and platinized charcoal proceeds analogously, but with the intermediate formation of coumaran (2,3-dihydrobenzofuran). IV, b750 170-2°, d420 0.9636, nD20 1.4683, M. R. 36.4. II, b756 182-4°, d420 0.9214, nD20 1.4631, M. R. 38.31. III, b756 203-6°, d420 0.9162, nD20 1.4643.

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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: 5-Iodo-2-furaldehyde(SMILESS: IC1=CC=C(O1)C=O,cas:2689-65-8) is researched.Related Products of 2689-65-8. The article 《Studies in the area of furan acetal compounds. VIII. Synthesis of (2-furyl)di(acetamido)methanes》 in relation to this compound, is published in Khimiya Geterotsiklicheskikh Soedinenii. Let’s take a look at the latest research on this compound (cas:2689-65-8).

Furfurylidenebisacetamides (I, R = H, Me, Br) were obtained in 38-50% yields by condensation of AcNH2 with the corresponding 2-furaldehyde in C6H6 containing KU-2. 2-Furyl-1,3-dioxepanes (II, R = H, Me, Br, I, NO2) were obtained in 70-8% yields by boiling HO(CH2)4OH with the corresponding 2-furaldehyde in C6H6 containing KU-2.

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

HPLC of Formula: 2689-65-8. 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 Interaction of furan derivatives with antipyrine. Author is Shalygin, A. F..

5-(R-substituted furfurals (I, R = Br or iodo) were prepared Condensation of I (R = Br or iodo) with antipyrine (II) gave diantipyryl-5-(R-substituted)furylmethanes (III, R = Br or iodo), resp. Thus, a mixture of 28.8 g. furfural in 120 ml. CH2Cl2, 0.005 g. S, and 0.05 g. hydroquinone was heated at ∼100° in a N current, 57.5 g. Br in 150 ml. CH2Cl2 added in 2 hrs., and the mixture heated 2 hrs. to give 34.3% I (R = Br), m. 81-2°. A mixture of 5.6 g. I (R = Br), 5.8 g. anhydrous KI, and 30 ml. AcOH refluxed 1.5 hrs. and kept 1 hr. gave 78.8% I (R = iodo), m. 125°. To 12.5 millimoles II in 10 ml. H2O was added 6.25 millimoles I (R = Br) in 10 ml. EtOH over in 0.5 hr. at 80-5° and the mixture worked up to give 84.2% III (R =Br). HCl salt m. 100-1° (H2O-alc.). Similarly equimol. amounts of I (R = iodo) and II gave 80% III (R = iodo). HCL salt m. 83° (EtOH).

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