Tag: M.W=300-400

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: Tricyclohexylphosphonium tetrafluoroborate, is researched, Molecular C18H34BF4P, CAS is 58656-04-5, about Pd-Catalyzed Decarboxylative Cross-Coupling of 2-Carboxyazine N-oxides with Various (Hetero)aryl Halides, the main research direction is pyridine quinoline isoquinoline aryl preparation; 2-carboxyazine N-oxides; catalysis; cross-coupling; palladium.Electric Literature of C18H34BF4P.

Decarboxylation cross-coupling reactions of substituted 2-carboxyazine N-oxides, with a variety of heteroaryl halides or aryl halides, by bimetallic Pd0/CuI and Pd0/AgI catalysis are reported. Two possible pathways, a conventional bimetallic-catalyzed decarboxylation-arylation, as well as a protodecarboxylation direct carbon hydrogen bond (C-H bond) arylation sequence have been considered. These methods provide the first general decarboxylation-arylation methodol. for the 2-carboxyazine series. Under optimized conditions the synthesis of the target compounds was achieved using palladium bromide (PdBr2), tricyclohexylphosphine tetrafluoroborate and carbonic acid silver(1+) salt (1:2) (silver carbonate) or copper oxide (Cu2O) as catalyst combination. Starting materials included 2-quinolinecarboxylic acid 1-oxide, 4-methoxy-2-quinolinecarboxylic acid 1-oxide, isoquinoline 2-oxide, 2-pyridinecarboxylic acid 1-oxide. Aryl halides included 3-bromopyridine, bromobenzene, iodobenzene, 2-bromopyrazine, 2-iodopyrazine, 2-iodofuran. The title compds thus formed included biaryls, such as 2,3′-bipyridine 1-oxide, 2-(2-furanyl)pyridine 1-oxide, 2-(4-chlorophenyl)quinoline 1-oxide and related substances.

Although many compounds look similar to this compound(58656-04-5)Electric Literature of C18H34BF4P, numerous studies have shown that this compound(SMILES:F[B-](F)(F)F.[PH+](C1CCCCC1)(C2CCCCC2)C3CCCCC3), has unique advantages. If you want to know more about similar compounds, you can read my other articles.

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Sangkheaw, Ponkarnan; Therdthianwong, Supaporn; Therdthianwong, Apichai; Wongyao, Nutthapon; Yongprapat, Sarayut published an article about the compound: Hydrogen tetrachloroaurate(III) trihydrate( cas:16961-25-4,SMILESS:Cl[Au-](Cl)(Cl)Cl.[H]O[H].[H]O[H].[H]O[H].[H+] ).Formula: AuCl4H7O3. 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:16961-25-4) through the article.

An alk.-acid direct glycerol fuel cell (AA-DGFC) was proposed for a portable power generating device that requires high power d. A good design of cell components and optimum cell operating conditions are the key factors to yield high performance of fuel cells. In this work, AA-DGFC with Pt/C anode catalyst showed outstanding performance with open-circuit voltage as high as 1.72V and the peak power d. of 330 mWcm-2 which is about 2.7 times higher than the performance of a typical anion exchange membrane direct glycerol fuel cell (AEDGFC). The operating conditions providing the best performance were at glycerol to NaOH mole ratio of 1:5, 1.0M glycerol concentration, an anolyte volumetric flow rate of 1mLmin-1 and cell temperature of 80°C. For the design of the cell component, the optimum Nafion ionomer content in the anode microporous layer was 20 wt%. Among the Au-based catalysts at the anode studied Au/C, Au-Ni/C and Au-Ag/C, the Au-Ni/C outperformed the others with the power d. of 142 mWcm-2.

Although many compounds look similar to this compound(16961-25-4)Formula: AuCl4H7O3, numerous studies have shown that this compound(SMILES:Cl[Au-](Cl)(Cl)Cl.[H]O[H].[H]O[H].[H]O[H].[H+]), has unique advantages. If you want to know more about similar compounds, you can read my other articles.

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: 16961-25-4, is researched, SMILESS is Cl[Au-](Cl)(Cl)Cl.[H]O[H].[H]O[H].[H]O[H].[H+], Molecular AuCl4H7O3Journal, Evaluation Study, Article, Journal of Agricultural and Food Chemistry called Competitive lateral flow immunoassay relying on Au-SiO2 Janus nanoparticles with an asymmetric structure and function for furazolidone residue monitoring, Author is Su, Lihong; Wang, Lulu; Xu, Jingke; Wang, Zonghan; Yao, Xiaolin; Sun, Jing; Wang, Jianlong; Zhang, Daohong, the main research direction is lateral flow immunoassay gold silica Janus nanoparticle furazolidone; food safety antibiotic residue lateral flow immunoassay; Au−SiO2 Janus nanoparticle; asymmetric structure; furazolidone; lateral flow immunoassay.Name: Hydrogen tetrachloroaurate(III) trihydrate.

Gold nanoparticles (AuNPs) are the most commonly used signal materials in lateral flow immunoassay (LFIA). However, the assay sensitivity of traditional AuNP-based LFIA is usually limited by the incomplete competition between free target analytes and immobilized antigens for the binding of AuNP-labeled antibodies. To unfreeze this limitation, here, asym. Au-SiO2 Janus NPs (about 66 nm) were designed and synthesized. Au-SiO2 Janus NPs can assemble into snowman-like anisotropic structures and combine two different physicochem. properties at their opposite sides, where the AuNP side mainly possesses the antibody conjugating and signal providing functions and the SiO2 side primarily offers the stable function. In virtue of the unique asym. nanostructure, only the AuNP side can interact with target analytes by specific antigen-antibody interactions, which could significantly improve the efficiency of competition. Selecting furazolidone as a model analyte, the immunoassay biosensor showed a limit of detection as low as 0.08 ng/mL, 10-fold decreased than that of the AuNPs-LFIA. Moreover, the Au-SiO2 Janus NP lateral flow immunoassay was well applied in chicken, pork, honey, and beef food samples with visual detection limits of 0.8 ng/g, 0.16 ng/g, 0.4 ng/mL, and 0.16 ng/g, resp. The Au-SiO2 Janus NPs possess the advantages of both materials, which will broaden their applications as a potential alternative in the rapid and sensitive detection of antibiotic residues.

Although many compounds look similar to this compound(16961-25-4)Name: Hydrogen tetrachloroaurate(III) trihydrate, numerous studies have shown that this compound(SMILES:Cl[Au-](Cl)(Cl)Cl.[H]O[H].[H]O[H].[H]O[H].[H+]), has unique advantages. If you want to know more about similar compounds, you can read my other articles.

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Products of reaction between trimethylamine and pentaerythrityl tetrahalides》. Authors are D’Amico, A.; Verga, G..The article about the compound:Pentaerythrityltetrabromidecas:3229-00-3,SMILESS:BrCC(CBr)(CBr)CBr).Formula: C5H8Br4. Through the article, more information about this compound (cas:3229-00-3) is conveyed.

When 0.02 mole C(CH2Br4) and 0.33 mole Me3N or multiples thereof was heated with cyclohexane in an autoclave 6 hrs. at 190°, among the reaction products only Me4NBr was isolated. An analogous result was obtained with the tetraiodide. Some steric impediment to the formation of C(CH2NHMe.MeI)4 was observed.

Although many compounds look similar to this compound(3229-00-3)Formula: C5H8Br4, 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

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Heat capacities and thermodynamic properties of globular molecules. IV. Pentaerythrityl chloride, bromide, and iodide from 6 to 3O0°K》. Authors are Payne, Donald H.; Westrum, Edgar F. Jr..The article about the compound:Pentaerythrityltetrabromidecas:3229-00-3,SMILESS:BrCC(CBr)(CBr)CBr).Recommanded Product: 3229-00-3. Through the article, more information about this compound (cas:3229-00-3) is conveyed.

cf. CA 56, 12379a. The heat capacities of the title compounds were determined by adiabatic calorimetry from 6 to 300°K., and the entropies, enthalpies, and free-energy functions evaluated. The entropies at 298.15°K. are 61.54, 69.58, and 75.70 cal./mole °K. for the chloride, bromide, and iodide, resp. Although the general temperature dependences of the heat capacities are of the usual sigmoid character, the chloride and the bromide both show a region of anomalously slow absorption of energy.

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

Recommanded Product: Pentaerythrityltetrabromide. 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 A high-efficiency method for the synthesis of N, N1, N2, N3-tetra(p-toluenesulphonyl) pentaerythrityl tetramine. Author is Liu, Shengbo; Liu, Jinjie.

A high-efficiency method for the synthesis of N, N1, N2, N3-tetra(p-toluenesulfonyl) pentaerythrityl tetramine is presented. And this method comprises fully grinding and mixing pentaerythrityl tetrabromide and excess p-toluenesulfonamide (excess amount 15%); placing into reactor; sealing the reactor, placing the reactor into bake oven, reacting at 210°C for 6-8 h. The yield is over 95%.

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

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Computed Properties of C18H34BF4P. 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: Tricyclohexylphosphonium tetrafluoroborate, is researched, Molecular C18H34BF4P, CAS is 58656-04-5, about Employing Pd-Catalyzed C-H Arylation in Multicomponent-Multicatalyst Reactions (MC)2R: One-Pot Synthesis of Dihydrobenzoquinolines.

Alkenylchloropyridines such as I (R = F3C, MeSO2, NC, Me, 4-F3CC6H4, H) underwent one- and two-pot tandem hydroarylation reactions with arylboronic acids such as 3-thienylboronic acid and 4-R2C6H4B(OH)2 (R2 = Me2N, PhO, MeO, Me, t-Bu) in the presence of [Rh(ethene)2Cl]2 and either 1,2-bis(diphenylphosphino)benzene or a nonracemic bicyclooctadienecarboxamide followed by palladium-catalyzed cyclization in the presence of Pd(OAc)2, tricyclohexylphosphonium tetrafluoroborate, and K2CO3 to give fused dihydroquinolines such as thienoquinolines II (R = F3C, MeSO2, NC, Me, 4-F3CC6H4) and dihydrobenzoquinolines such as III (R2 = Me2N, PhO, MeO, Me, t-Bu). In the presence of a nonracemic bicyclooctadienecarboxamide, rhodium-catalyzed hydroarylation followed by palladium-catalyzed cyclization reactions of I (R = F3C; R1 = n-Pr) with 4-phenoxyphenyl and 4-tert-butylphenyl boronic acids yielded III (R1 = n-Pr; R2 = PhO, t-Bu) in 91:9 and 93:7 er, resp. Tandem hydroarylation, cyclization, and dehydrogenation of I (R = MeSO2) with 3-thienylboronic acid yielded a methanesulfonylbenzoquinoline in 95% yield.

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

Computed Properties of AuCl4H7O3. 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: Hydrogen tetrachloroaurate(III) trihydrate, is researched, Molecular AuCl4H7O3, CAS is 16961-25-4, about A “”signal off”” aptasensor based on NiFe2O4 NTs and Au@Pt NRs for the detection of deoxynivalenol via voltammetry.

A “”signal off”” aptasensor has been developed to detect deoxynivalenol (DON). DON aptamers (Apt) were used as biol. recognition elements, nickel ferrite nanotubes (NiFe2O4 NTs) are used as the base material to increase the surface area of the electrode, and the Au@Pt NRs were used as carriers for loading signal labels thionine (Thi) and complementary strand (cDNA). In the presence of DON it will be specifically captured by Apt, then the competition mechanism was triggered; the signal mols. fall off from the electrode surface, which then causes the electrode signal to decrease. NiFe2O4 NTs and Au@Pt NRs were characterized by transmission electron microscope (TEM), scanning electron micrograph (SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD). The designed sensor provides a concentration range of 1 x 10-8 to 5 x 10-4 mg mL-1 and limit of detection of 3.02 x 10-9 mg mL-1. Determination of DON in corn meal samples was investigated and the recovery was 98.4 to 103.5%. The proposed aptasensor displayed good sensitivity, high specificity, and acceptable reproducibility. Graphical abstractBased on NiFe2O4 NTs as substrate material and Au@Pt NRs as signal label prepared DON aptasensor for the determination of DON.

After consulting a lot of data, we found that this compound(16961-25-4)Computed Properties of AuCl4H7O3 can be used in many types of reactions. And in most cases, this compound has more advantages.

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Probst, Nicolas; Grelier, Gwendal; Ghermani, NourEddine; Gandon, Vincent; Alami, Mouad; Messaoudi, Samir published an article about the compound: Tricyclohexylphosphonium tetrafluoroborate( cas:58656-04-5,SMILESS:F[B-](F)(F)F.[PH+](C1CCCCC1)(C2CCCCC2)C3CCCCC3 ).Product Details of 58656-04-5. 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:58656-04-5) through the article.

An expedient method for the synthesis of fused glycosylquinolin-2-ones and glycosylspirooxindoles through an unprecedented intramol. Pd-catalyzed anomeric C-H activation of the sugar moiety of 2-bromophenyl glycosylcarboxamides is reported. The scope of the reaction is broad and tolerates a wide range of functional groups.

After consulting a lot of data, we found that this compound(58656-04-5)Product Details of 58656-04-5 can be used in many types of reactions. And in most cases, this compound has more advantages.

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 New Insights on the Dynamic Role of the Protecting Agent on the Reactivity of Supported Gold Nanoparticles, published in 2020, which mentions a compound: 16961-25-4, Name is Hydrogen tetrachloroaurate(III) trihydrate, Molecular AuCl4H7O3, Recommanded Product: Hydrogen tetrachloroaurate(III) trihydrate.

A very efficient catalyst (AuCePVA) was prepared by depositing gold colloids on CeO2 and using polyvinyl alc. (PVA) as protective agent. Complete conversion and selectivity in furfural (2-FA) oxidative esterification to methyl-2-furoate (Me-2-F) was obtained without base under conventional heating at 120°C. AuCePVA was compared with Au/CeO2 obtained by deposition-precipitation method, pointing out that along with the size of the Au nanoparticles and the surface sites of the ceria support, also PVA chains played a role during reaction. In situ FTIR spectroscopy measurements of adsorbed mols. at controlled temperature and pressure demonstrated that PVA acted not merely as gold stabilizer, but also as mediator during the 2-FA oxidative esterification, leaving both Au and ceria sites available for catalysis at the reaction temperature In a perspective of process intensification, the microwave-assisted (MW-assisted) 2-FA oxidative esterification was carried out. Depending on the reaction time and temperature, AuCePVA favored the oxidation of the hemiacetal into the ester rather than the re-oxidation of the acetal into the ester, due to the formation of Ce3+ sites under MW irradiation

After consulting a lot of data, we found that this compound(16961-25-4)Recommanded Product: Hydrogen tetrachloroaurate(III) trihydrate can be used in many types of reactions. And in most cases, this compound has more advantages.

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem