Tag: M.W=300-400

Product Details of 58656-04-5. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Tricyclohexylphosphonium tetrafluoroborate, is researched, Molecular C18H34BF4P, CAS is 58656-04-5, about Access to 6-arylpyrrolo[2,3-d]pyrimidines via a palladium-catalyzed direct C-H arylation reaction. Author is Dodonova, Jelena; Tumkevicius, Sigitas.

An efficient method of palladium-catalyzed direct arylation has been developed for the selective functionalization of the C6 position of 2,4-diarylpyrrolo[2,3-d]pyrimidines I [R1 = Ph, 4-MeOC6H4, 4-(9-carbazolyl)phenyl]. Under optimal conditions, reactions with various aryl bromides R2Br [R2 = Ph, 4-NCC6H4, 4-PhC6H4, 4-(9-carbazolyl)phenyl, etc.] successfully provided a wide range of 6-arylpyrrolo[2,3-d]pyrimidines II.

This compound(Tricyclohexylphosphonium tetrafluoroborate)Product Details of 58656-04-5 was discussed at the molecular level, the effects of temperature and reaction time on the properties of the compound were discussed, and the optimum reaction conditions were selected.

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Application In Synthesis of Pentaerythrityltetrabromide. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: Pentaerythrityltetrabromide, is researched, Molecular C5H8Br4, CAS is 3229-00-3, about A New, Second Generation Trithiol Bifunctional Chelate for 72,77As: Trithiol(b)-(Ser)2-RM2. Author is Najafi Khosroshahi, Firouzeh; Feng, Yutian; Ma, Li; Manring, Simon; Rold, Tammy L.; Gallazzi, Fabio A.; Kelley, Steven P.; Embree, Mary F.; Hennkens, Heather M.; Hoffman, Timothy J.; Jurisson, Silvia S..

Trithiol chelates are suitable for labeling radioarsenic (72As: 2.49 MeV β+, 26 h; 77As: 0.683 MeV β-, 38.8 h) to form potential theranostic radiopharmaceuticals for positron emission tomog. (PET) imaging and therapy. A trithiol(b)-(Ser)2-RM2 bioconjugate and its arsenic complex were synthesized and characterized. The trithiol(b)-(Ser)2-RM2 bioconjugate was radiolabeled with no-carrier-added 77As in over 95% radiochem. yield and was stable for over 48 h, and in vitro IC50 cell binding studies of [77As]As-trithiol(b)-(Ser)2-RM2 in PC-3 cells demonstrated high affinity for the gastrin-releasing peptide (GRP) receptor (low nanomolar range). Limited biodistribution studies in normal mice were performed with HPLC purified 77As-trithiol(b)-(Ser)2-RM2 demonstrating both pancreatic uptake and hepatobiliary clearance.

This compound(Pentaerythrityltetrabromide)Application In Synthesis of Pentaerythrityltetrabromide was discussed at the molecular level, the effects of temperature and reaction time on the properties of the compound were discussed, and the optimum reaction conditions were selected.

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 《Dipole moments and molecular structure. II. Penta-erythritol tetranitrate》. Authors are Mortimer, C. T.; Spedding, H.; Springall, H. D..The article about the compound:Pentaerythrityltetrabromidecas:3229-00-3,SMILESS:BrCC(CBr)(CBr)CBr).Category: imidazoles-derivatives. Through the article, more information about this compound (cas:3229-00-3) is conveyed.

cf. C.A. 44, 7601e. The dipole moments of pentaerythritol tetrabromide (I), tetraiodide (II), and tetranitrate (III) in benzene and in dioxane were determined For both I and II, the dipole moment was zero; this indicates that there is no free rotation about the C-C bond. In the case of III the moment was 2.5 D.; this indicates free rotation about the C-O bond in the nitrate. It is concluded, therefore, that the shortening of the C-O bond, observed in the crystal, cannot be due to a high degree of double-bond character.

This compound(Pentaerythrityltetrabromide)Category: imidazoles-derivatives was discussed at the molecular level, the effects of temperature and reaction time on the properties of the compound were discussed, and the optimum reaction conditions were selected.

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: Hydrogen tetrachloroaurate(III) trihydrate(SMILESS: Cl[Au-](Cl)(Cl)Cl.[H]O[H].[H]O[H].[H]O[H].[H+],cas:16961-25-4) is researched.Recommanded Product: 3724-19-4. The article 《Monolithic metal-containing TiO2 aerogels assembled from crystalline pre-formed nanoparticles as efficient photocatalysts for H2 generation》 in relation to this compound, is published in Applied Catalysis, B: Environmental. Let’s take a look at the latest research on this compound (cas:16961-25-4).

Nanoparticle-based aerogels are 3-dimensional (3D) assemblies of macroscopic size that maintain the intrinsic properties of the initial nanoparticles. Accordingly, they bear immense potential to become an emerging platform for designing new and efficient photocatalysts. However, to take full advantage of this strategy, understanding of the multiscale processes occurring in such 3D-architectures is essential. Here, we prepared aerogels by co-assembling spherical Au, Pd, and PdAu with TiO2 nanoparticles and investigated their photocatalytic properties for hydrogen generation. During gelation, the anatase nanoparticles undergo oriented attachment, homogeneously entrapping the metal nanoparticles in the growing network. The aerogels offer a high porosity with a mean pore size of ca. 34 nm and a large surface area of about 450 m2 g-1. The porous structure enhances the light-harvesting, reagent transport, and electron migration process, generating 3.5-fold more hydrogen in comparison to the corresponding powders.

This compound(Hydrogen tetrachloroaurate(III) trihydrate)Safety of Hydrogen tetrachloroaurate(III) trihydrate was discussed at the molecular level, the effects of temperature and reaction time on the properties of the compound were discussed, and the optimum reaction conditions were selected.

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: Tricyclohexylphosphonium tetrafluoroborate( cas:58656-04-5 ) is researched.Computed Properties of C18H34BF4P.Watanabe, Toshiaki; Oishi, Shinya; Fujii, Nobutaka; Ohno, Hiroaki published the article 《Palladium-Catalyzed sp3 C-H Activation of Simple Alkyl Groups: Direct Preparation of Indoline Derivatives from N-Alkyl-2-bromoanilines》 about this compound( cas:58656-04-5 ) in Organic Letters. Keywords: alkylbromoaniline palladium cyclization; indoline derivative preparation; cyclization catalyst palladium. Let’s learn more about this compound (cas:58656-04-5).

The sp3 C-H activation of a simple alkyl group catalyzed by palladium(0) provides a novel and convenient strategy for the synthesis of various indolines, e.g., I, from simple precursors, such as N-alkyl-2-bromoanilines. This study demonstrates that assisting moieties in the substrate such as a pyridine or quaternary carbon are not always necessary for sp3 C-H activation.

This compound(Tricyclohexylphosphonium tetrafluoroborate)Computed Properties of C18H34BF4P was discussed at the molecular level, the effects of temperature and reaction time on the properties of the compound were discussed, and the optimum reaction conditions were selected.

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Article, Research Support, Non-U.S. Gov’t, Organic & Biomolecular Chemistry called Synthesis of substituted azafluorenones from dihalogeno diaryl ketones by palladium-catalyzed auto-tandem processes, Author is Marquise, Nada; Dorcet, Vincent; Chevallier, Floris; Mongin, Florence, which mentions a compound: 58656-04-5, SMILESS is F[B-](F)(F)F.[PH+](C1CCCCC1)(C2CCCCC2)C3CCCCC3, Molecular C18H34BF4P, Product Details of 58656-04-5.

Substituted azafluorenones such as I (R = H, F3C; R1 = Ph, 4-HOC6H4, 3-thienyl, 2-benzo[b]thienyl) were prepared by tandem Suzuki coupling and arylation reactions of dihalo-substituted pyridinyl aryl ketones such as II (R = H, F3C) with aryl- and methylboronic acids such as R1B(OH)2 (R1 = Ph, 4-HOC6H4, 3-thienyl, 2-benzo[b]thienyl) in the presence of Pd(OAc)2, tricyclohexylphosphium tetrafluoroborate, and K2CO3 in DMF at 130°; in some cases, uncyclized Suzuki coupling products were also formed. Under similar conditions, reaction of II (R = H) with tert-Bu acrylate yielded (E)-I (R = H; R1 = t-BuO2CCH:CH); the reaction of an iodobenzoyl chloropyridine yielded only Heck reaction product without coupling. The structures of I (R = H, F3C; R1 = Ph), of 7-phenyl-4-aza-9-fluorenone, and of 1-phenyl-2-aza-9-fluorenone were determined by X-ray crystallog.

This compound(Tricyclohexylphosphonium tetrafluoroborate)Product Details of 58656-04-5 was discussed at the molecular level, the effects of temperature and reaction time on the properties of the compound were discussed, and the optimum reaction conditions were selected.

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Formula: AuCl4H7O3. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: Hydrogen tetrachloroaurate(III) trihydrate, is researched, Molecular AuCl4H7O3, CAS is 16961-25-4, about One-Pot Synthesis of Monodisperse Single-Crystalline Spherical Gold Nanoparticles for Universal Seeds. Author is Umar, Aminah; Kim, Jiwhan; Choi, Sung-Min.

Synthesis of uniform polyhedral gold nanoparticles (Au NPs) by the seed-mediated method is often limited by the difficulties in preparing uniform seeds. Here, we report a facile one-pot synthesis of highly monodisperse single-crystalline spherical Au NPs, which can be used as universal seeds. This method only involves simple mixing of cetyltrimethyl ammonium 4-vinylbenzoate, HAuCl4, AgNO3, and HCl in water at a fixed temperature The single crystallinity of particles is achieved by the interplay between oxidative etching and controlled surface capping by silver atoms. As-synthesized Au NPs show uniform single crystallinity, shape yield of nearly 100%, and size polydispersity less than 5%. The as-synthesized single-crystalline Au NPs are used as universal seeds to grow monodisperse polyhedral Au NPs of different shapes including octahedra, cubes, rhombic dodecahedra, concave cubes, and concave rhombic dodecahedra with size polydispersity as small as 1.5-4.2% depending on the particle shape, the smallest values for any shape reported so far. This clearly shows the importance of seed uniformity achieved by the present method.

This compound(Hydrogen tetrachloroaurate(III) trihydrate)Formula: AuCl4H7O3 was discussed at the molecular level, the effects of temperature and reaction time on the properties of the compound were discussed, and the optimum reaction conditions were selected.

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 Simple synthesis of novel terthiophene-based D-A1-D-A2 polymers for polymer solar cells, the main research direction is terthiophene polymer solar cell fabrication.Recommanded Product: Tricyclohexylphosphonium tetrafluoroborate.

Direct arylation was used to synthesize a series of novel terthiophene (T3)-based D-A1-D-A2 polymers and D-A2-D monomers in fewer synthetic steps. In these T3-based D-A1-D-A2 polymers, pyrrolo[3,4-c]pyrrole-1,4-dione (DPP) was selected as the first acceptor A1, octyl-thieno[3,4-c]pyrrole-4,6-dione (TPD) or 2,1,3-benzothiadiazole (BT) or fluorinated benzothiadiazole (FBT) was selected as the secondary acceptor A2. T2-based polymer with the bithiophene segments (T2) as the donor was synthesized for comparison, too. UV-vis absorption, electrochem. properties, blend film morphol., and photovoltaic properties of the polymers were studied to explore the effects of the oligothiophene unit and secondary acceptor moiety (A2), meanwhile, the fluorine substitution effect was also discussed. It is shown that the change of donor segment from T2 to T3 introduces a difference in the energy levels, crystallinity, polymer:PC71BM morphol. and PSC performances between the T2-based and T3-based D-A1-D-A2 polymers. Varying the secondary acceptor (A2) from BT to TPD also promotes the crystallinity and backbone planarity leading to enhanced PSC performances of the T3-based D-A1-D-A2 polymer. Although the effectiveness of fluorine substitution for tuning the UV-vis absorption, energy levels and degree of crystallinity has been demonstrated, the insufficient EDONORLUMO – EPCBMLUMO energy offset and poor miscibility of polymer:PC71BM limit the short circuit current (Jsc). In addition, the highest Jsc of 12.98 mA cm-2 is achieved for P1, while the higher HOMO level limits the open circuit voltage (Voc) and leads to a power conversion efficiency (PCE) of 4.36%.

This compound(Tricyclohexylphosphonium tetrafluoroborate)Recommanded Product: Tricyclohexylphosphonium tetrafluoroborate was discussed at the molecular level, the effects of temperature and reaction time on the properties of the compound were discussed, and the optimum reaction conditions were selected.

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Zhurnal Obshchei Khimii called The problem of the structure of Gustavson’s hydrocarbon, Author is Slobodin, Ya. M.; Shokhor, I. N., which mentions a compound: 3229-00-3, SMILESS is BrCC(CBr)(CBr)CBr, Molecular C5H8Br4, Computed Properties of C5H8Br4.

Contrary to Murray and Stevenson (C.A. 38, 1476.9, 3615.1), the Raman spectrum of the hydrocarbon first obtained by Gustavson (J. prakt. Chem. 54, 98, 105(1896)), if it is synthesized by the action of Zn dust on (CH2Br)4C in 80-85% alc., and the product is immediately removed from the reaction mixture (to avoid secondary reactions), then distilled several times (last 2 times over Na), resulting in b. 39-41°, n20D 1.41847, d204 0.7377, MRD 23.25, shows neither the frequency 581 nor 1033 cm.-1, and contains neither spiropentane nor other hydrocarbons with a (CH2)3 ring. By its Raman spectrum, it is a mixture of methylcyclobutane and 2-methyl-1-butene. The presence of small amounts of isoprene is probable. The formation reaction can be represented by C(CH2Br)4 → CH2.CH2.CH2.C:CH2 → CH2CHCME:CH2 +H2 → MeCH2CH2CMe:CH2.

This compound(Pentaerythrityltetrabromide)Computed Properties of C5H8Br4 was discussed at the molecular level, the effects of temperature and reaction time on the properties of the compound were discussed, and the optimum reaction conditions were selected.

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

Kaneko, Eri; Matsumoto, Yuki; Kamikawa, Ken published the article 《Synthesis of Azahelicene N-Oxide by Palladium-Catalyzed Direct C-H Annulation of a Pendant (Z)-Bromovinyl Side Chain》. Keywords: helicene azahelicene preparation; CH activation; azahelicenes; domino reactions; helical structures; palladium.They researched the compound: Tricyclohexylphosphonium tetrafluoroborate( cas:58656-04-5 ).Category: imidazoles-derivatives. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:58656-04-5) here.

The synthesis of the target compounds was achieved by a carbon-hydrogen bond activation and domino reaction process using palladium(II) acetate and tricyclohexylphosphonium tetrafluoroborate as catalyst combination under optimized reaction conditions. The title compounds thus formed included an axially chiral (+)-helicene (I) [phenanthro[1,2-a]phenanthridine] and related substances, such as dibenzo[c,g]phenanthrene, benzo[c]naphtho[1,2-f]quinoline, naphtho[1,2-a]phenanthridine 2-oxide, naphtho[1,2-f]quinoline derivatives Key intermediates in this synthesis included 4-[2-[(1Z)-2-bromoethenyl]-1-naphthalenyl]isoquinoline, 2-[(1Z)-2-bromoethenyl]-1,1′-binapphthalene.

This compound(Tricyclohexylphosphonium tetrafluoroborate)Category: imidazoles-derivatives was discussed at the molecular level, the effects of temperature and reaction time on the properties of the compound were discussed, and the optimum reaction conditions were selected.

Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem