Tag: M.W=300-400

In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called The improved synthesis and characterization of 2,2-dihalogenated methyl-1,3-dihalogenated propane, published in 2011-01-25, which mentions a compound: 3229-00-3, mainly applied to halogenation methyl propane synthesis, Recommanded Product: Pentaerythrityltetrabromide.

Pentaerythritol as raw material reacts with the thionyl chloride (SOCl2) and phosphorus tribromide (PBr3) resp. to prepare 2,2-di(chloromethyl)-1,3-dichloropropane (pentaerythrityl chloride), and 2,2-di(bromomethyl)-1,3-dibromopropane (pentaerythrityl bromide). The structures of the target products were characterized through IR and 1H NMR, and the effects of material ratio on the yield of pentaerythrityl chloride and pentaerythrityl bromide were discussed. The yield of pentaerythrityl chloride and pentaerythrityl bromide were 80.53% and 84.16% resp.

The article 《The improved synthesis and characterization of 2,2-dihalogenated methyl-1,3-dihalogenated propane》 also mentions many details about this compound(3229-00-3)Recommanded Product: Pentaerythrityltetrabromide, you can pay attention to it, because details determine success or failure

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – 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: Hydrogen tetrachloroaurate(III) trihydrate, is researched, Molecular AuCl4H7O3, CAS is 16961-25-4, about Anisotropic Bimetallic Core-Satellite-Poly(aniline) Nanohybrids for Detection of Autoantibodies.Name: Hydrogen tetrachloroaurate(III) trihydrate.

Bimetallic core-satellite nanoparticles are widely exploited in surface-enhanced Raman scattering (SERS)-based applications due to their enhanced optical properties compared to single-component metallic nanoparticles (MNPs). In addition, anisotropic hybrid nanostructures containing both MNPs and polymeric compartments constitute a new class of functional nanomaterials for photonic applications because they show different functionalities and physicochem. characteristics at two distinct compartments. Herein, synthesis of two kinds of anisotropic bimetallic core-satellite-poly(aniline) nanohybrids (ABCPNs) using small or polymeric ligand-coated gold nanospheres or gold nanorods as seeds is reported. The ABCPNs exhibit enhanced optical properties due to a local electromagnetic field generated in the narrow interparticle gap between core and satellite nanoparticles. Furthermore, a SERS-based quant. anal. of autoantibodies against cyclic citrullinated peptide using the ABCPNs as SERS nanoprobes for a diagnosis of early rheumatoid arthritis is demonstrated, suggesting that these multi-functional nanostructures will be potential for advanced SERS-based biosensors.

The article 《Anisotropic Bimetallic Core-Satellite-Poly(aniline) Nanohybrids for Detection of Autoantibodies》 also mentions many details about this compound(16961-25-4)Name: Hydrogen tetrachloroaurate(III) trihydrate, you can pay attention to it, because details determine success or failure

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

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 Radiosensitization by gold nanoparticles: impact of the size, dose rate, and photon energy, published in 2020, which mentions a compound: 16961-25-4, Name is Hydrogen tetrachloroaurate(III) trihydrate, Molecular AuCl4H7O3, Electric Literature of AuCl4H7O3.

Gold nanoparticles (GNPs) emerged as promising antitumor radiosensitizers. However, the complex dependence of GNPs radiosensitization on the irradiation conditions remains unclear. In the present study, we investigated the impacts of the dose rate and photon energy on damage of the pBR322 plasmid DNA exposed to X-rays in the presence of 12 nm, 15 nm, 21 nm, and 26 nm GNPs. The greatest radiosensitization was observed for 26 nm GNPs. The sensitizer enhancement ratio (SER) 2.74 ± 0.61 was observed at 200 kVp with 2.4 mg/mL GNPs. Reduction of X-ray tube voltage to 150 and 100 kVp led to a smaller effect. We demonstrate for the first time that the change of the dose rate differentially influences on radiosensitization by GNPs of various sizes. For 12 nm, an increase in the dose rate from 0.2 to 2.1 Gy/min led to a ∼1.13-fold increase in radiosensitization. No differences in the effect of 15 nm GNPs was found within the 0.85-2.1 Gy/min range. For 21 nm and 26 nm GNPs, an enhanced radiosensitization was observed along with the decreased dose rate from 2.1 to 0.2 Gy/min. Thus, GNPs are an effective tool for increasing the efficacy of orthovoltage X-ray exposure. However, careful selection of irradiation conditions is a key prerequisite for optimal radiosensitization efficacy.

The article 《Radiosensitization by gold nanoparticles: impact of the size, dose rate, and photon energy》 also mentions many details about this compound(16961-25-4)Electric Literature of AuCl4H7O3, you can pay attention to it, because details determine success or failure

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – 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: 58656-04-5, is researched, Molecular C18H34BF4P, about Synthesis of Functionalized Dioxa-aza[7]helicenes Using Palladium Catalyzed Arylations, the main research direction is dioxaazahelicene crystal mol structure preparation palladium catalyzed arylation.Computed Properties of C18H34BF4P.

Despite the recent reports on transition-metal catalyzed cycloisomerization strategies toward helicenes, the amount of palladium catalyzed routes remains rather scarce. Within this letter the successful preparation and characterization of novel dioxa-aza[7]helicenes using palladium mediated coupling reactions is presented.

The article 《Synthesis of Functionalized Dioxa-aza[7]helicenes Using Palladium Catalyzed Arylations》 also mentions many details about this compound(58656-04-5)Computed Properties of C18H34BF4P, you can pay attention to it, because details determine success or failure

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

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 Catalytic Direct Arylation with Aryl Chlorides, Bromides, and Iodides: Intramolecular Studies Leading to New Intermolecular Reactions, published in 2006-01-18, which mentions a compound: 58656-04-5, Name is Tricyclohexylphosphonium tetrafluoroborate, Molecular C18H34BF4P, Product Details of 58656-04-5.

A catalyst for the intramol. direct arylation of a broad range of simple and heterocyclic arenes with aryl iodides, bromides, and chlorides has been developed. These reactions occur in excellent yield and are highly selective. Studies with aryl iodides substrates revealed that catalyst poisoning occurs due to the accumulation of iodide in the reaction media. This can be overcome by the addition of silver salts which also permits these reactions to occur at lower temperature The utility of the methodol. is illustrated by a rapid synthesis of a carbazole natural product and by the synthesis of sterically encumbered tetra-ortho-substituted biaryls via ring-opening reactions of the direct arylation products. Mechanistic investigations have provided insight into the catalyst’s mode of action and show the presence of a kinetically significant C-H bond cleavage in palladium-catalyzed direct arylation of simple arenes. Knowledge garnered from these studies has led to the development of new intermol. arylation reactions with previously inaccessible arenes, opening the door for the development of other new direct arylation processes.

The article 《Catalytic Direct Arylation with Aryl Chlorides, Bromides, and Iodides: Intramolecular Studies Leading to New Intermolecular Reactions》 also mentions many details about this compound(58656-04-5)Product Details of 58656-04-5, you can pay attention to it, because details determine success or failure

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

SDS of cas: 16961-25-4. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: Hydrogen tetrachloroaurate(III) trihydrate, is researched, Molecular AuCl4H7O3, CAS is 16961-25-4, about Extracellular vesicles based self-grown gold nanopopcorn for combinatorial chemo-photothermal therapy. Author is Zhang, Dan; Qin, Xianya; Wu, Tingting; Qiao, Qi; Song, Qingle; Zhang, Zhiping.

Here, we generated a popcorn-like gold nanostructure exploiting extracellular vesicles (EVs). EVs can first serve as the vehicle for chemotherapeutic drug doxorubicin (DOX). Taking advantages of EVs, gold nanoparticles can be then self-grown surrounding the EVs, assembling into popcorn-like nanostructure. The formulated nanopopcorn, consisting of self-grown gold nanoparticles and EVs encapsulated with DOX, retained the photothermal transduction from gold nanoparticle assemblies and cytotoxicity of DOX. Under external near IR irradiation, gold nanopopcorn can produce hyperthermia to induce tumor ablation and trigger drug release, achieving combinatorial chemo-photothermal therapy. The nanoplatform demonstrated improved cellular internalization, controlled drug release, enhanced antitumor efficacy with tumor inhibitory rate up to 98.6% and reduced side effects. Our design of popcorn-like nanostructure will contribute a novel modality for facile and green synthesis of complex metal nanostructures exploiting natural properties of EVs for combinational therapy.

The article 《Extracellular vesicles based self-grown gold nanopopcorn for combinatorial chemo-photothermal therapy》 also mentions many details about this compound(16961-25-4)SDS of cas: 16961-25-4, you can pay attention to it or contacet with the author([email protected]) to get more information.

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

SDS of cas: 16961-25-4. 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: Hydrogen tetrachloroaurate(III) trihydrate, is researched, Molecular AuCl4H7O3, CAS is 16961-25-4, about Femtosecond laser modification of the optical properties of glass containing noble-metal nanoparticles. Author is Nikov, Ro; Nedyalkov, N.; Koleva, M.; Stankova, N.; Iordanova, E.; Yankov, G.; Aleksandrov, L.; Iordanova, R..

The paper presents results on femtosecond laser irradiation-induced modification of the optical properties of a composite material – gold nanoparticles embedded into a borosilicate glass host. The process is initiated by laser pulses delivered by a Ti:sapphire laser system with pulse duration of 35 fs. The glass samples are prepared by melt quenching with gold added as hydrogen tetrachloroaurate (III) hydrate to the initial composition Post-fabrication annealing leads to a homogeneous formation of nanoparticles in the glass; varying the annealing parameters results in producing nanoparticles with different sizes and shapes. The laser irradiation of the samples induces significant modification of the optical spectra of the glass through changes of the nanoparticles characteristics. The effects are studied of the laser fluence, laser wavelength and laser pulses number The heat diffusion equation is applied to estimate the temperature evolution and explain the modifications observed The results demonstrate this technique′s efficiency in modifying the nanoparticles properties with a high 3D spatial resolution, which can be useful in fabrication of integrated optical systems.

The article 《Femtosecond laser modification of the optical properties of glass containing noble-metal nanoparticles》 also mentions many details about this compound(16961-25-4)SDS of cas: 16961-25-4, you can pay attention to it, because details determine success or failure

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 58656-04-5, is researched, SMILESS is F[B-](F)(F)F.[PH+](C1CCCCC1)(C2CCCCC2)C3CCCCC3, Molecular C18H34BF4PJournal, Article, Organic Letters called The Use of Phosphine Ligands to Control the Regiochemistry of Pd-Catalyzed Hydrostannations of 1-Alkynes: Synthesis of (E)-1-Tributylstannyl-1-alkenes, Author is Darwish, Alla; Lang, Adam; Kim, Thomas; Chong, J. Michael, the main research direction is phosphine cocatalyst regioselectivity effect palladium catalysis hydrostannation terminal alkyne.Computed Properties of C18H34BF4P.

The regiochem. of Pd-catalyzed hydrostannations of terminal alkynes is dramatically influenced by ligand effects. Use of phosphines such as Cy3P, t-Bu2PCH2t-Bu, and t-Bu3P provides (E)-1-tributylstannyl-1-alkenes with regioselectivities up to >99:<1 for substrates where the commonly used Ph3P shows much lower regioselectivities. For example, a 96:4 ratio of (E)-11-(tributylstannyl)undec-10-en-1-ol (87 % yield) to 10-(tributylstannyl)undec-10-en-1-ol was obtained from HO(CH2)9C2H using 0.5 % Pd2(dba)3, 2 % Cy3PHBF4, and 4 % iPr2NEt in toluene at room temperature after 2 h. After consulting a lot of data, we found that this compound(58656-04-5)Computed Properties of C18H34BF4P can be used in many types of reactions. And in most cases, this compound has more advantages.

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Pentaerythrityltetrabromide( cas:3229-00-3 ) is researched.Synthetic Route of C5H8Br4.Xu, Wei; Lu, Yin Xiang; Guo, Peng; Zhou, Hui; Lan, Bi Jian published the article 《Tetrakis[(4-phenylpiperazin-1-yl)methyl]methane》 about this compound( cas:3229-00-3 ) in Acta Crystallographica, Section E: Structure Reports Online. Keywords: mol structure phenylpiperazinylmethyl methane; crystal structure phenylpiperazinylmethyl methane. Let’s learn more about this compound (cas:3229-00-3).

The title compound, C45H60N8, is a sym. mol. with four chem. identical substituents bonded to a central C atom. In the crystal structure, the 4-phenylpiperazin-1-yl groups exhibit four different conformations, with no obvious pseudosymmetry. Crystallog. data are given.

After consulting a lot of data, we found that this compound(3229-00-3)Synthetic Route of C5H8Br4 can be used in many types of reactions. And in most cases, this compound has more advantages.

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Recommanded Product: 3229-00-3. 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: Pentaerythrityltetrabromide, is researched, Molecular C5H8Br4, CAS is 3229-00-3, about Synthesis of star polymethyl acrylate by SET-LRP at ambient temperature. Author is Ding, Wei; Lv, Chongfu; Sun, Ying; Luan, Huoxin; Yu, Tao; Qu, Guangmiao.

The star-shaped polymethyl acrylate (PMA) was synthesized by single electron transfer living radical polymerization (SET-LRP) at 30° in DMSO, using 2,2-dibromomethyl-1,3-dibromopropane as the multi-functional initiator, Cu0 powder and tris-(2-dimethylamino ethyl)amine (Me6-TREN) as catalyst. The structure of polymer was analyzed by 1H NMR, and the results showed that the star-shaped PMA had perfect chain ends (-Br) retention. In addition, the polymerization proceeded smoothly and the time dependence of ln([M]0/[M]) was linear, which could indicate a first order propagation rate with respect to both radicals and monomer concentration, the polymerization was the living polymerization The Mn and Mw/Mn of polymer were being measured by Gel Permeation Chromatog. The kpapp = 0.0367 h-1 and the conversion was 36.3% at 16 h, meanwhile the MnGPC of the polymer was 13,300 and the Mw/Mn was 1.40.

Although many compounds look similar to this compound(3229-00-3)Recommanded Product: 3229-00-3, numerous studies have shown that this compound(SMILES:BrCC(CBr)(CBr)CBr), has unique advantages. If you want to know more about similar compounds, you can read my other articles.

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem