Tag: 200-300

The author of 《Gold redox catalysis for cyclization/arylation of allylic oximes: synthesis of isoxazoline derivatives》 were Jimoh, Abiola Azeez; Hosseyni, Seyedmorteza; Ye, Xiaohan; Wojtas, Lukasz; Hu, Yong; Shi, Xiaodong. And the article was published in Chemical Communications (Cambridge, United Kingdom) in 2019. Recommanded Product: 4-Iodobenzaldehyde The author mentioned the following in the article:

Base-assisted diazonium activation has been employed to promote gold(I)/(III) redox catalysis toward allylic oxime cyclization/aryl coupling. Isoxazolines I (R1 = cyclohexyl, Ph, 3-MeC6H4, 2-naphthyl, etc.; R2 = 4-FC6H4, 4-MeO2CC6H4, 3-EtO-4-F3CC6H3, etc.) were prepared in good to excellent yields from allylic oximes II and aryldiazonium salts R2N2+BF4- using this method, whereas the alternative photoactivation method provided only trace amounts of the isoxazoline products. This study further broadens the scope of gold redox chem. The results came from multiple reactions, including the reaction of 4-Iodobenzaldehyde(cas: 15164-44-0Recommanded Product: 4-Iodobenzaldehyde)

4-Iodobenzaldehyde(cas: 15164-44-0) is used in synthesis of 4-[2-(trimethylsilyl)ethynyl]benzaldehyde, 5,15-dimesityl-10-(3-[2-(trimethylsilyl)ethynyi]phenyl}-20-(4-iodophenyl)porphyrin, and 5,15-dimesityl-10-[3,5-bis{2-[4-(N,N’-difluoroboryl-1,9-dimethyidipyrrin-5-yl)-phenyl]ethynyl}phenyl]-20-(4-iodophenyl)porphyrin.Recommanded Product: 4-Iodobenzaldehyde

Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

In 2022,Sajjadi, Mohaddeseh; Nasrollahzadeh, Mahmoud; Ghafuri, Hossein; Baran, Talat; Orooji, Yasin; Baran, Nuray Yilmaz; Shokouhimehr, Mohammadreza published an article in International Journal of Biological Macromolecules. The title of the article was 《Modified chitosan-zeolite supported Pd nanoparticles: A reusable catalyst for the synthesis of 5-substituted-1H-tetrazoles from aryl halides》.HPLC of Formula: 15854-87-2 The author mentioned the following in the article:

A novel heterogeneous catalyst was developed using chitosan-zeolite supported Pd nanoparticles (PdNPs@CS-Zeo) and used in an efficient synthesis of 5-substituted-1H-tetrazoles I [Ar = Ph, 4-pyridyl, 4-MeC6H4, etc.] from aryl halides with high yields for relatively short reaction times with an easy work-up procedure. In this method, highly effective and reusable PdNPs@CS-Zeo catalyst was used in the reaction of various aryl iodides/bromides with K4[Fe(CN)6] as a non-toxic cyanide source to catalyze the [2 + 3] cycloaddition of the corresponding aryl nitriles with NaN3 in the sequential one-pot preparation of 5-substituted-1H-tetrazoles I. The synthesized PdNPs@CS-Zeo nanocatalyst was characterized using XRD, FTIR, TEM, HRTEM, XPS, Raman, TG-DTG, ICP-OES, BET, and EDS mapping. Addnl., the nanocatalyst could be effectively separated by filtration and reused for multiple times without significant decrease of catalytic activity. In the part of experimental materials, we found many familiar compounds, such as 4-Iodopyridine(cas: 15854-87-2HPLC of Formula: 15854-87-2)

4-Iodopyridine(cas: 15854-87-2) belongs to pyridine. Pyridines are often used as catalysts or reagents; particular notice has been paid recently to how pyridine coordinates to metal centers enabling a wide range of valuable reactions. HPLC of Formula: 15854-87-2

Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

《Reactivity Trends in the Gas-Phase Addition of Acetylene to the N-Protonated Aryl Radical Cations of Pyridine, Aniline, and Benzonitrile》 was written by Shiels, Oisin J.; Kelly, P. D.; Bright, Cameron C.; Poad, Berwyck L. J.; Blanksby, Stephen J.; da Silva, Gabriel; Trevitt, Adam J.. Reference of 4-Iodopyridine And the article was included in Journal of the American Society for Mass Spectrometry in 2021. The article conveys some information:

A key step in gas-phase polycyclic aromatic hydrocarbon (PAH) formation involves the addition of acetylene (or other alkyne) to σ-type aromatic radicals, with successive additions yielding more complex PAHs. A similar process can happen for N-containing aromatics In cold diffuse environments, such as the interstellar medium, rates of radical addition may be enhanced when the σ-type radical is charged. This paper investigates the gas-phase ion-mol. reactions of acetylene with nine aromatic distonic σ-type radical cations derived from pyridinium (Pyr), anilinium (Anl), and benzonitrilium (Bzn) ions. Three isomers are studied in each case (radical sites at the ortho, meta, and para positions). Using a room temperature ion trap, second-order rate coefficients, product branching ratios, and reaction efficiencies are measured. The rate coefficients increase from para to ortho positions. The second-order rate coefficients can be sorted into three groups: low, between 1 and 3 x 10-12 cm3 mol.-1 s-1 (3Anl and 4Anl); intermediate, between 5 and 15 x 10-12 cm3 mol.-1 s-1 (2Bzn, 3Bzn, and 4Bzn); and high, between 8 and 31 x 10-11 cm3 mol.-1 s-1 (2Anl, 2Pyr, 3Pyr, and 4Pyr); and 2Anl is the only radical cation with a rate coefficient distinctly different from its isomers. Quantum chem. calculations, using M06-2X-D3(0)/6-31++G(2df,p) geometries and DSD-PBEP86-NL/aug-cc-pVQZ energies, are deployed to rationalize reactivity trends based on the stability of prereactive complexes. The G3X-K method guides the assignment of product ions following adduct formation. The rate coefficient trend can be rationalized by a simple model based on the prereactive complex forward barrier height. The results came from multiple reactions, including the reaction of 4-Iodopyridine(cas: 15854-87-2Reference of 4-Iodopyridine)

4-Iodopyridine(cas: 15854-87-2) belongs to pyridine. Pyridine and its simple derivatives are stable and relatively unreactive liquids, with strong penetrating odours that are unpleasant.Reference of 4-Iodopyridine

Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Mkrtchyan, Satenik; Iaroshenko, Viktor O. published their research in Chemical Communications (Cambridge, United Kingdom) in 2021. The article was titled 《Mechanochemical synthesis of aromatic sulfonamides》.Application of 625-99-0 The article contains the following contents:

A three-component Pd-catalyzed aminosulfonylation reaction of K2S2O5 and amines with aryl bromides or aromatic carboxylic acids was developed. This strategy was developed to utilize mech. energy and accommodate primary as well as secondary aliphatic and aromatic amines to provide a new shortcut to a wide range of sulfonamides. Studies on the scope and limitations of the reaction indicated its tolerance of a vast range of functional groups and many structural patterns. The reactions were scaled up to gram quantities. The experimental part of the paper was very detailed, including the reaction process of 1-Chloro-3-iodobenzene(cas: 625-99-0Application of 625-99-0)

1-Chloro-3-iodobenzene(cas: 625-99-0) belongs to organic iodides. The carbon-iodine bond is weaker than other carbon-halogen bonds due to the poor electronegative nature of the iodine atom. In general, organic iodides are light-sensitive and turn yellow during storage, owing to the formation of iodine.Application of 625-99-0

Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

The author of 《Partitioning effect of nitrogen catalyst into polymerizing particles on dispersion reversible chain transfer catalyzed polymerization (dispersion RTCP) of methyl methacrylate in supercritical carbon dioxide and organic solvents》 were Okubo, Masayoshi; Kitayama, Yukiya; Taniyama, Tomoya; Liu, Xiang; Zhang, Jianzheng; Shi, Hao. And the article was published in Journal of Polymer Science, Part A: Polymer Chemistry in 2019. COA of Formula: C4H4INO2 The author mentioned the following in the article:

Reversible chain transfer catalyzed polymerization (RTCP) in dispersion polymerization system (dispersion RTCP) of Me methacrylate (MMA) was performed with N-iodosuccimide (NIS) as a nitrogen catalyst in supercritical carbon dioxide (scCO2). The solubility of NIS in scCO2 can be controlled by tuning the pressure, and this led to promote NIS partitioning into polymerizing particles. As a result, the mol. weight distribution control was successfully improved by decreasing the NIS solubility in the medium by tuning the scCO2 at a low pressure of 20 MPa. On the other hand, at the same NIS concentration, a solution RTCP of MMA in toluene as a homogeneous polymerization system did not proceed with a controlled/living manner. The importance of NIS partitioning into the polymerizing particles was also confirmed in hexane as well as scCO2 medium. From these results, it was clarified that the NIS catalyst partitioning into the polymerizing particles as main polymerization loci is a key factor to control the mol. weight distribution in the dispersion RTCP of MMA in scCO2. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018. In the experimental materials used by the author, we found 1-Iodopyrrolidine-2,5-dione(cas: 516-12-1COA of Formula: C4H4INO2)

1-Iodopyrrolidine-2,5-dione(cas: 516-12-1) is used in the preparation of vinyl sulfones from olefins and benzenesulfinic acid. It acts as a source for I+ and involved in Hunsdiecker reactions for the conversion of cinnamic acids, and propiolic acids to the corresponding alfa-halostyrenes and 1-halo-1-alkynes respectively. COA of Formula: C4H4INO2

Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

《Iridium-catalyzed B-H insertion of sulfoxonium ylides and borane adducts: a versatile platform to α-boryl carbonyls》 was written by Zhang, Shang-Shi; Xie, Hui; Shu, Bing; Che, Tong; Wang, Xiao-Tong; Peng, Dongming; Yang, Fan; Zhang, Luyong. Category: iodides-buliding-blocks And the article was included in Chemical Communications (Cambridge, United Kingdom) in 2020. The article conveys some information:

Ir-catalyzed B-H bond insertion reactions of trimethylamine-borane and sulfoxonium ylides were demonstrated, furnishing α-boryl ketones in moderate to excellent yields in most cases (51 examples; up to 84%). This practical and scalable insertion reaction showed broad substrate scope, high functional-group compatibility and could be applied in late-stage modification of structurally complex drug compounds Further synthetic applications were also demonstrated. In the experimental materials used by the author, we found Trimethylsulfoxonium iodide(cas: 1774-47-6Category: iodides-buliding-blocks)

Trimethylsulfoxonium iodide(cas: 1774-47-6) reacts with sodium hydride to prepare dimethyloxosulfonium methylide, which is used as a methylene-transfer reagent in synthetic chemistry. It is used to prepare ylide, which reacts with carbonyl compounds to get epoxides. Further, it reacts with alfa,beta-unsaturated esters to get cyclopropyl esters.Category: iodides-buliding-blocks

Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

In 2019,Journal of Polymer Science, Part A: Polymer Chemistry included an article by Koronka, Daniel; Mahmoud, Ahmed Mohamed Ahmed; Miyatake, Kenji. Category: iodides-buliding-blocks. The article was titled 《Effect of crosslinking on the properties of partially fluorinated anion exchange membranes》. The information in the text is summarized as follows:

A series of crosslinked, ammonium-functionalized, and partially fluorinated copolymers have been prepared and evaluated as anion exchange membranes. In order to investigate the effect of crosslinking on the membrane properties, precursor copolymers containing chloromethyl groups were crosslinked with various aliphatic diamines followed by quaternization with monoamines. Crosslinking was effective in lowering water absorbability at no expense of high hydroxide ion conductivity of the membranes. By tuning the degree of crosslinking (20 mol %) and crosslinker chain length (C6 and C8), the highest ion conductivity of 73 mS/cm (at 80°C in water) was achieved. Furthermore, alk. stability of the membranes was also improved by the crosslinking; the remaining ion conductivity after the stability test (in 1 M potassium hydroxide at 80°C) was 8.2 mS/cm (after 1000 h) for the C6 crosslinked membrane and 1 mS/cm (after 500 h) for the uncrosslinked membrane, resp. The ammonium groups attached with the crosslinkers seemed more alk. stable than the uncrosslinked benzyltrimethylammonium groups, while the polymer main chain was intact under the harsh alk. conditions. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym.Chem. 2019. In the experiment, the researchers used many compounds, for example, 1-Chloro-3-iodobenzene(cas: 625-99-0Category: iodides-buliding-blocks)

1-Chloro-3-iodobenzene(cas: 625-99-0) belongs to organic iodides. Alkyl iodides react at a faster rate than alkyl fluorides due to the weak C-I bond.Category: iodides-buliding-blocksIodo alkanes participate in a variety of organic synthesis reactions, which include the Simmons–Smith reaction (cyclopropanation using iodomethane), Williamson ether synthesis, Wittig reaction, Grignard reaction, alkyl coupling reactions, and Wurtz reaction.

Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Recommanded Product: 3-Bromo-6-iodo-2-methylpyridineOn September 30, 2016 ,《Povarov reaction, scope and limitations: Preparation of diversely heterocyclic tetrahydro-1H-cyclopenta[c]quinolines》 was published in Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry. The article was written by Ninoa, Patricia; Cabaa, Marta; Aguilarb, Nuria; Terricabrasb, Emma; Albericioc, Fernando; Fernandez, Joan-Carles. The article contains the following contents:

Herein, parallel synthesis of diverse heterocyclic-tetrahydro-1H-cyclopenta[c]quinolines, e.g., I in excellent yields and high endo diastereoselectivity has been described. These compounds are highly functionalized natural product-like tricyclic systems, which may be useful as biol. relevant targets. Fine tuning of the reaction conditions need to be performed depending on the nature and mol. structure of the heterocyclic aromatic carbaldehyde, as well as the choice of the Lewis acid catalyst. Synthesis of the heterocyclic aromatic aldehyde precursors of the Povarov reaction is also described. The experimental part of the paper was very detailed, including the reaction process of 3-Bromo-6-iodo-2-methylpyridine(cas: 1008361-77-0Recommanded Product: 3-Bromo-6-iodo-2-methylpyridine)

3-Bromo-6-iodo-2-methylpyridine(cas: 1008361-77-0) belongs to pyridine. Pyridine-based materials are valued for their optical and physical properties as well as their medical potential. Additionally, pyridine-based natural products continue to be discovered and studied for their properties and to understand their biosynthesis.Recommanded Product: 3-Bromo-6-iodo-2-methylpyridine

Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

Quality Control of 4-IodopyridineIn 2021 ,《Impact of noncovalent interactions on structural and photophysical properties of zero-dimensional tellurium(IV) perovskites》 was published in Journal of Materials Chemistry C: Materials for Optical and Electronic Devices. The article was written by Nicholas, Aaron D.; Walusiak, Benjamin W.; Garman, Leah C.; Huda, Mehrun N.; Cahill, Christopher L.. The article contains the following contents:

Reported is the synthesis and characterization of eight new halotellurate(IV) compounds consisting of isolated [TeX6]2- (X = Cl, Br) octahedra charge balanced by halopyridinium (XPy; X = H, Cl, Br, I) cations and assembled via noncovalent interactions (NCIs) in the second coordination sphere. Computational d. functional theory (DFT) based natural bonding orbital (NBO) and d. of state (DOS) methods were used to (i) map the band structure, (ii) quantify and categorize noncovalent interaction strength and type, and (iii) deconstruct metal-halide bonding orbitals. The authors’ findings demonstrate the influence of NCIs on Te-X bonding, particularly AO hybridization, and the ability to tune band gap energies as a function of noncovalent interaction type and strength. In brief, band gap energies for the [TeCl6]2- materials decrease with increasing NCI strength, whereas the opposite is true for [TeBr6]2- compounds This report is a useful platform for probing the relation between second sphere effects and the structural and photophys. properties within the halotellurate(IV) family of low dimensional perovskites. The experimental process involved the reaction of 4-Iodopyridine(cas: 15854-87-2Quality Control of 4-Iodopyridine)

4-Iodopyridine(cas: 15854-87-2) is a halogenated heterocycle that is a building block for proteomics research. 4-Iodopyridine is used as a reagent in the synthesis of indazolylamides as glucocorticoid receptor agonists.Quality Control of 4-Iodopyridine

Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com

《Quantum-chemical description of nucleophilic substitution reactions in the series of benzene derivatives in a localization approximation》 was written by Pankratov, A. N.. Application In Synthesis of 1-Chloro-4-iodo-2-nitrobenzene And the article was included in Journal of Structural Chemistry (Translation of Zhurnal Strukturnoi Khimii) on August 31 ,2001. The article conveys some information:

The energies of anion localization for reactions of 1-chloro-2-nitro-4-substituted benzenes with the methoxide ion -OCH3 were calculated The correlations between these energies and the relative rate of the nucleophilic substitution were established. The compounds studied were 1-Cl-2-NO2C6H3X, where X = H, CH3, CF3, CN, CHO, COCH3, COC6H5, CONH2, CON(CH3)2, COOCH3, N=NC6H5, N=NOC6H5, NO=NC6H5, N3, NO2, SCH3, SO2CH3, SO2C6H11, SO2C6H5, SO2N(CH3)C6H5, F, Cl, Br, and I. PM3 quantum-chem. calculations were performed using the MOPAC programs with full geometry optimization. Linear dependences of Inν on Λ- [Λ- = ΔΔHf, ΔΔGf (Gibbs energies)]. The correlation coefficients were rather high, especially when the exptl. data for the reaction in the polar medium were compared with the gas-phase reactivity index. For the reaction at 0°, the linear model is even more adequate if the exptl. and calculated data for 1-chloro-2-nitro-4-X-benzenes with X = N=NOC6H5, NO=NC6H5, N3, and F are excluded from consideration. In the experiment, the researchers used many compounds, for example, 1-Chloro-4-iodo-2-nitrobenzene(cas: 41252-95-3Application In Synthesis of 1-Chloro-4-iodo-2-nitrobenzene)

1-Chloro-4-iodo-2-nitrobenzene(cas: 41252-95-3) belongs to organic iodides.Application In Synthesis of 1-Chloro-4-iodo-2-nitrobenzene The carbon-iodine bond is weaker than other carbon-halogen bonds due to the poor electronegative nature of the iodine atom. In general, organic iodides are light-sensitive and turn yellow during storage, owing to the formation of iodine.

Referemce:
Iodide – Wikipedia,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com