Tag: M.W:200-300

Application In Synthesis of 1,5-Dibromopentane. 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: 1,5-Dibromopentane, is researched, Molecular C5H10Br2, CAS is 111-24-0, about Influence of dicationic quaternary ammonium gemini surfactant system on metal-amino acid complex-ninhydrin reaction. Author is Kumar, Dileep; Rub, Malik Abdul.

In the current study, we have elucidated the influence of dicationic quaternary ammonium geminis system on metal-amino acid [Ni(II)-his]+ complex-ninhydrin reaction with the help of UV-vis spectrophometer at 343 K and pH 5.0. Under varying exptl. conditions, rate constant values, kψ, were determined using a computer-based program. Quaternary ammonium gemini systems (rate constant values of 16-6-16, 16-5-16 and 16-4-16 at 30 x 10-5 mol dm-3 are 5.5 x 10-5 s-1, 6.5 x 10-5 s-1 and 7.5 x 10-5 s-1, resp.) are detected more superior compared to aqueous system (rate constant in aqueous is 1.7 x 10-5 s-1). Study was catalyzed and accelerated by gemini surfactants (even though at concentrations below than their cmc values) compared to aqueous medium. Rate constant increases progressively on increasing [gemini] (region I, where [gemini] is smaller than their cmc) and leveling-off regions attain (region II, at [gemini] up to 400 x 10-5 mol dm-3). Afterward, gemini provides a region III of increasing kψ at higher concentration (region III, beyond 400 x 10-5 mol dm-3). Exptl. results acquired in dicationic quaternary ammonium gemini surfactant system are deduced quant. by kinetic pseudo-phase model. For determination of cmc of geminis having a different methylene spacer chain length (s = 4, 5, 6), the specific conductance at varied [16-6-16], [16-5-16] and [16-4-16] (i.e., water and water + ninhydrin + [Ni(II)-his]+) were 0.043 x 10-3 mol dm-3 at 303 K and 0.053 x 10-3 mol dm-3 at 343 K; 0.034 x 10-3 mol dm-3 at 303 K and 0.044 x 10-3 mol dm-3 at 343 K; 0.032 x 10-3 mol dm-3 at 303 K; 0.040 x 10-3 mol dm-3 at 343 K, resp., recorded on a conductivity meter. Several activation parameters for 16-6-16, 16-5-16 and 16-4-16 (ΔH# = 45.0, 43.5 and 42.0 kJ mol-1; ΔS# 87.0, 87.6 and 88.3 JK-1; Ea = 47.8, 46.3 and 44.8 kJ mol-1) and binding parameters for 16-6-16, 16-5-16 and 16-4-16 (KX = 63.0, 58.0 and 54.0 mol-1 dm3; KY = 70.0, 66.0 and 62.0 mol-1 dm3) are also determined

As far as I know, this compound(111-24-0)Application In Synthesis of 1,5-Dibromopentane can be applied in many ways, which is helpful for the development of experiments. Therefore many people are doing relevant researches.

Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Pyridine mercurials》. Authors are Hurd, Charles D.; Morrissey, Clarence J..The article about the compound:2-Chloro-5-pyridinesulfonyl chloridecas:6684-39-5,SMILESS:ClC1=NC=C(C=C1)[S](=O)(=O)Cl).Name: 2-Chloro-5-pyridinesulfonyl chloride. Through the article, more information about this compound (cas:6684-39-5) is conveyed.

The preparation and properties of di-3-pyridylmercury (I), bis(3-pyridylmercuri)ammonium chloride (II), 6-chloro-3-pyridylmercuric chloride (III), and 2-pyridylmercuric chloride (IV) are described. 3-Pyridylmercuric acetate (V) (75 g.) in 3 l. H2O at 80° treated dropwise with 13 g. NaCl in 50 cc. H2O gave 81% 3-pyridylmercuric chloride (VI), m. about 245°; it gave recrystallized from H2O (2 g./1 l.) needles, m. 265-8°. V in hot H2O treated with aqueous NaBr gave 3-pyridylmercuric bromide, m. 275° (decomposition). Similarly was obtained the corresponding iodide, yellow solid, m. 280° (decomposition). Br (10 g.) added during 3.5 h. with stirring to 20 g. VI and 6.6 g. NaBr in H2O at 50-60°, the mixture held 15 h. at 20°, treated with 5.7 g. HCl, and filtered from 16.4 g. residue, the filtrate basified and extracted with Et2O, and the residue (3.0 g.) from the extract redistilled yielded 1.6 g. 3-bromopyridine, b. 168-71.5°. VI (0.2 g.) refluxed 0.5 h. with 25 cc. 0.1N iodine containing 1 g. KI and 3 cc. CHCl3, and the mixture titrated with 0.1N Na2S2O3 indicated a quant. reaction. VI (10 g.), m. 245°, and 100 g. NH4OH stirred occasionally during 0.5 h. and filtered gave 5.1 g. solid filter residue of II, m. 168-80°, which liberated NH3 when boiled with dilute NaOH; the filtrate evaporated and the solid residue (4.8 g.) leached with H2O left unchanged VI, m. 240°. Na2S2O3 (50 g.) in 50 cc. H2O treated with 10 g. V, and the solution allowed to stand 0.5 h. gave 4.5 g. I, white solid, m. 225-6°. II (1 g.) mixed with 10 saturated aqueous Na2S2O3, and the precipitate recrystallized from EtOH gave I, m. 255°, which recrystallized from EtOH gave crystals, m. 239°. I in EtOH mixed with alc. HgCl2 gave VI, m. 240-5°. I in EtOH treated with alc. gave the di-HCl salt, white crystals, m. 222° (decomposition). Similarly was prepared the dipicrate, yellow crystals, m. 255° (decomposition). I.2HCl heated to 200° evolved pyridine. I dipicrate treated with alc. KOH gave I, m. 237-8°. The urethane of 3-aminopyridine (VII) acidified with HCl and heated to 100° until the effervescence ceased, the H2O evaporated, and the residue dissolved in hot C6H6 and precipitated with 2 volumes ligroine gave the amine, m. 62°, in 40% yield. VII (1.88 g.) was diazotized in 6 cc. cold. concentrated HCl with 1.4 g. NaNO2 in 6 cc. H2O and then 5.4 g. HgCl2 in 6 cc. HCl added to yield 6.2 g. diazonium salt-HgCl2 double salt (VIII). VIII (5 g.) mixed with cooling with 5 g. Cu in 30 cc. Me2CO, the mixture treated with 30 cc. NH4OH, allowed to stand 15 h., diluted with an equal volume H2O, and filtered, the filter residue extracted in a Soxhlet apparatus 1 h. with Me2CO, the extract evaporated, and the residue (0.8 g.) crystallized from a little EtOH gave I, m. 232°. VI (10 g.) added to 50 cc. cold NH4OH, the mixture filtered after 0.5 h., the filtrate treated with 10 g. Cu powder, and filtered after several days, the filtrate evaporated to dryness, and the residue recrystallized from EtOH gave a small amount of I, m. 227-34°. 2-Pyridinethiol (22 g.) (from 2-bromopyridine and thiourea), 300 cc. HCl, and 70 cc. ice water treated at 0-5° with excess gaseous Cl, the mixture poured into 800 cc. ice water, and a part of the precipitate recrystallized by dissolving in (CH2Cl)2 at 40° and cooling to -5° gave an unidentified substance, white needles, m. 210° (from Me2CO); the remainder of the solid suspended in 200 cc. cold H2O, mixed with 40 g. Zn dust, heated 20 min. to boiling, made alk. with aqueous Na2CO3, and filtered, the filtrate neutralized, heated with 25 g. HgCl2 to boiling, refluxed 2 h., and filtered, and the filtrate neutralized with HCl yielded IV, white solid, m. 275° (from MeOH). 2-Chloro-5-pyridinesulfonyl chloride (25 g.), m. 51°, treated with vigorous stirring with 23 g. Zn dust, the mixture refluxed 0.5 h., made alk. with Na2CO3 and filtered, the filter residue washed with hot aqueous Na2CO3, the combined filtrates neutralized, treated with 32 g. HgCl2, refluxed 2 h., and filtered, and the filter residue washed with H2O and dried gave 4.5 g. solid, m. 130°, which heated twice with 10% aqueous NaOH at 80°, filtered hot, and washed with H2O yielded 1.5 g. III, m. 263°.

When you point to this article, it is believed that you are also very interested in this compound(6684-39-5)Name: 2-Chloro-5-pyridinesulfonyl chloride and due to space limitations, I can only present the most important information.

Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《2-Aminopyridine-5-sulfonamide and some derivatives》. Authors are Naegeli, C.; Kundig, W.; Brandenburger, H..The article about the compound:2-Chloro-5-pyridinesulfonyl chloridecas:6684-39-5,SMILESS:ClC1=NC=C(C=C1)[S](=O)(=O)Cl).Formula: C5H3Cl2NO2S. Through the article, more information about this compound (cas:6684-39-5) is conveyed.

The pyridine analog, 2-aminopyridine-5-sulfonamide (I), of the chemotherapeutically significant H2NC6H4SO2NH2, and a series of its derivatives substituted at the N atom of the side chain have been prepared from 2-chloropyridine-5-sulfonyl chloride (II) obtained either from 2-aminopyridine-5-sulfonic acid (III) or from N-methyl-2-pyridone-5-sulfonic acid (IV). A solution of 250 g. of 2-aminopyridine in 750 g. of H2SO4.H2O was heated at 200-10° for 5 hrs. with 0.5 g. Al powder and the cooled product was poured on ice. The washed precipitate was combined with further fractions from the mother liquor and crystallized from hot H2O, yielding 278 g. (60%) of III; Ac derivative, C7H8N2O4S, m. 300-2° (decomposition), from the Na salt which was converted to the difficultly soluble Cu salt. A suspension of 85 g. of finely powd. III in 600 cc. of 20% HCl at 10° was stirred with 50 g. (1.5 mols.) of NaNO2 in 125 cc. H2O. After 3 hrs. the solution was evaporated to dryness in vacuo, taken up in hot H2O and precipitated with alc., producing 83 g. (97%) of 2-pyridone-5-sulfonic acid (V), converted by chlorination with PCl5 (C. A. 25, 4267) into II. IV (2 g.), obtained by treating N-methyl-2-pyridone with Me2SO4 (Ger. 597,452, C. A. 28, 5083.5), was ground with 4.5 g. PCl5 and refluxed at 130-5° for 5 hrs. with a few drops of POCl3. The cold product was poured over ice and the solid mass was ground with NaHCO3, washed and dried. Extraction with petroleum ether gave 1.7 g. (82%) of II, m. 51°. Gradual addition of 50 g. II in 50 cc. Me2CO to well-stirred cold 20% NH4OH, evaporation and recrystallization from H2O produced 42.7 g. (94%) of iridescent crystals of 2-chloropyridine-5-sulfonamide (VI), C5H5ClN2O2S, m. 158-9°, converted by heating in a bomb-tube for 5 hrs. at 125-60° with 20% NH4OH into 2-aminopyridine-5-sulfonamide (VII), C5H7N3O2S, m. 175.0-6.5°; di-Bz derivative, C19H15N3O4S, m. 221-3°. By heating with the requisite amine under a reflux or, when necessary, in a bomb-tube, VI was converted into 2-ethylamino-, 2-diethylamino-, 2-butylamino-, 2-allylamino-, 2-benzylamino- and 2-phenylaminopyridine-5-sulfonamide, m. 190-1°, 116-17, 121-2°, 195-201°, 199-201° and 181-3°, resp. Heating 5 g. VI with 8 mols. of 33% EtNH2 in a bomb-tube at 135-50° for 4 hrs. yielded 2-ethylaminopyridine-5-sulfonethylamide, C9H15N3O2S, m. 139-41°. Cautious addition of 2.9 g. (2.2 mols.) of PhNH2 to 3 g. VI in 2.5 cc. benzene with cooling, washing the pasty residue with dilute HCl and recrystallization from alc. gave 3 g. (79%) of 2-chloropyridine-5-sulfonanilide, C11H9ClN2O2S, m. 149-51°, converted by heating in a bomb-tube for 2 hrs. at 100-30° with 20% NH4OH to 2-aminopyridine-5-sulfonanilide, m. 176-8°. The addition of 10 g. II in 10 g. anhydrous pyridine to 8.2 g. sulfanilamide in 15 g. pyridine below 40° precipitation with H2O and crystallization from dilute alc. gave 13 g. (79%) of N4-(2′-chloropyridine-5′-sulfonyl)sulfanilamide, C11H10ClN3O4S2, m. 200-2°, transformed by heating with 25% NH4OH in a bomb-tube for 8 hrs. at 130-50° into the corresponding 2′-amino compound, m. 200-2°. Addition of 3.7 g. VII in 6 cc. pyridine to 4 g. II in 4 g. pyridine below 35°, washing the precipitate from H2O with dilute HCl and drying in vacuo yielded 6.5 g. (99%) of orange crystalline 2-(2′-chloropyridine-5′-sulfonyl)aminopyridine-5-sulfonamide, C10H9ClN4O4S2, m. 253-5°, converted by autoclaving in saturated NH4OH for 5 hrs. at 7 atm. at 120-60° into the corresponding 2′-amino derivative, m. 260°. Heating a mixture of 5.5 g. VI and 5 g. morpholine (VIII) in a bomb-tube for 4 hrs. at 120° and crystallization of the product from H2O yielded 5.3 g. (76%) of 2-(N-morpholyl)pyridine-5-sulfonamide, C9H13N3O3S, m. 182-3°. The dropwise addition of 1.5 g. II in 5 cc. Me2CO to a well-stirred solution of 1.23 g. (2 mols.) VIII in 3 cc. H2O gave 1.7 g. (95%) of colorless platelets of 2-chloropyridine-5-sulfonmorpholide, C9H11ClN2O3S, m. 143-4°, converted by refluxing for 5 hrs. with 2 mols. VIII in xylene and recrystallizing the product from alc., in 85% yield, into colorless 2-(N-morpholyl)pyridine-5-sulfonmorpholide. C13H19N3O4S, m. 189-91°. All the above compounds are well tolerated and their action on mice infected with streptococci will be reported elsewhere. The extreme reduction of activity by substitution of the benzene ring in sulfanilamide type compounds “”by heterocyclic rings”” was reported by Tullar at the Dallas meeting of the Am. Chem. Soc. (1938).

When you point to this article, it is believed that you are also very interested in this compound(6684-39-5)Formula: C5H3Cl2NO2S and due to space limitations, I can only present the most important information.

Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

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 Synthesis of aryl sulfonyl fluorides from aryl sulfonyl chlorides using sulfuryl fluoride (SO2F2) as fluoride provider, published in , which mentions a compound: 6684-39-5, Name is 2-Chloro-5-pyridinesulfonyl chloride, Molecular C5H3Cl2NO2S, Quality Control of 2-Chloro-5-pyridinesulfonyl chloride.

A highly efficient method for the synthesis of aryl sulfonyl fluorides ArSO2F [Ar = 4-MeC6H4, 4-PhC6H4, 4-ClC6H4, etc.] was developed from aryl sulfonyl chlorides using SO2F2 as fluoride source in up to 98% isolated yield under mild conditions. Gram scale experiments were also conducted, revealing the good practicality of this new protocol.

When you point to this article, it is believed that you are also very interested in this compound(6684-39-5)Quality Control of 2-Chloro-5-pyridinesulfonyl chloride and due to space limitations, I can only present the most important information.

Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

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 Regioselective Tandem C-H Alkylation/Coupling Reaction of ortho-Iodophenylethylenes via C,C-Pallada(II)cycles, published in 2021-10-01, which mentions a compound: 111-24-0, Name is 1,5-Dibromopentane, Molecular C5H10Br2, Computed Properties of C5H10Br2.

Five-membered C,C-pallada(II)cycles are a unique class of diorganopalladium species with favorable stability and an electron-rich nature, leading to efficient sequential reactions with diverse electrophiles and nucleophiles. Specifically, the development of aryl-alkenyl-palladacycle-based transformations could provide an attractive approach with regio- and stereocontrol for the construction of multifunctionalized arylethylenes. However, currently, the C,C-pallada(II)cycle formation relies on a rigid skeleton or steric congestion in the backbone to promote cyclopalladation, and the formation of aryl-alkenyl-palladacycle without an α-substituent has not been achieved. Furthermore, reactions that could discriminate between the two sp2 carbon centers of such C(sp2),C(sp2)-palladacycle remain elusive. Herein, a regioselective three-component tandem alkylation/coupling reaction applicable for a variety of non-, α-, or β-substituted and α,β-disubstituted ortho-iodophenylethylenes is reported. Electron-rich 2-pyridone ligands are employed to enable the cyclopalladation process leading to aryl-alkenyl-palladacycle intermediates, of which the two C-Pd bonds are discriminated toward alkylation by their inherent steric and electronic differences. Good linear free-energy relationships between regio-/chemoselectivities and Hammett σ values are observed

When you point to this article, it is believed that you are also very interested in this compound(111-24-0)Computed Properties of C5H10Br2 and due to space limitations, I can only present the most important information.

Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

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: 111-24-0, is researched, SMILESS is BrCCCCCBr, Molecular C5H10Br2Journal, Article, Angewandte Chemie, International Edition called Few-Unit-Cell MFI Zeolite Synthesized using a Simple Di-quaternary Ammonium Structure-Directing Agent, Author is Lu, Peng; Ghosh, Supriya; Dorneles de Mello, Matheus; Kamaluddin, Huda Sharbini; Li, Xinyu; Kumar, Gaurav; Duan, Xuekui; Abeykoon, Milinda; Boscoboinik, J. Anibal; Qi, Liang; Dai, Heng; Luo, Tianyi; Al-Thabaiti, Shaeel; Narasimharao, Katabathini; Khan, Zaheer; Rimer, Jeffrey D.; Bell, Alexis T.; Dauenhauer, Paul; Mkhoyan, K. Andre; Tsapatsis, Michael, the main research direction is MFI zeolite quaternary ammonium structure directing agent synthesis; adsorption; catalysis; di-quaternary structure directing agents; pentasil; ultrasmall crystalline domain.Quality Control of 1,5-Dibromopentane.

Synthesis of a pentasil-type zeolite with ultra-small few-unit-cell crystalline domains, which is called FDP (few-unit-cell crystalline domain pentasil), is reported. FDP is made using bis[1,5-(tributylammonium)]pentamethylene cations as structure directing agent (SDA). This di-quaternary ammonium SDA combines Butylammonium, in place of the one commonly used for MFI synthesis, Propylammonium, and a five-carbon nitrogen-connecting chain, in place of the six-carbon connecting chain SDAs that are known to fit well within the MFI pores. X-ray diffraction anal. and electron microscopy imaging of FDP indicate ca. 10 nm crystalline domains organized in hierarchical micro-/meso-porous aggregates exhibiting mesoscopic order with an aggregate particle size ≤ 5μm. Al and Sn can be incorporated into the FDP zeolite framework to produce active and selective methanol-to-hydrocarbon and glucose isomerization catalysts, resp.

When you point to this article, it is believed that you are also very interested in this compound(111-24-0)Quality Control of 1,5-Dibromopentane and due to space limitations, I can only present the most important information.

Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

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 Synthesis and antimicrobial activity of new 3,5-diarylidene-4-piperidone derivatives, published in 2016, which mentions a compound: 6684-39-5, mainly applied to diarylidene piperidone preparation antibacterial antifungal, SDS of cas: 6684-39-5.

Three series of heteroaromatic analogs diarylidene-4-piperidones I [Ar = C6H5, 4-FC6H4, 2-thienyl, etc.], [diarylidene(substituted)sulfonyl]piperidin-4-ones II [R1 = 3,5-Cl2-2-OHC6H2, 4-Cl-3-pyridyl, 3,5-Me2-4-isoxazolyl, etc.] and N-alkylcarbonyl-diarylidene-4-piperidones derivatives e.g., III, were synthesized. All the synthesized compounds were evaluated for their antimicrobial activity against six microbial strains, among them II [R1 = 3,5-Cl2-2-OHC6H2] showed best antifungal activity against Aspergillus niger and A. fumigatus. Structural elucidation of the synthesized compounds was realized based on various spectroscopic methods.

As far as I know, this compound(6684-39-5)SDS of cas: 6684-39-5 can be applied in many ways, which is helpful for the development of experiments. Therefore many people are doing relevant researches.

Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

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.Pan, Ting; Ding, Yanchao; Wu, Liyang; Liang, Liting; He, Xin; Li, Qianwen; Bai, Chuan; Zhang, Hui researched the compound: 2-Chloro-5-pyridinesulfonyl chloride( cas:6684-39-5 ).Computed Properties of C5H3Cl2NO2S.They published the article 《Design and synthesis of aminothiazole based Hepatitis B Virus (HBV) capsid inhibitors》 about this compound( cas:6684-39-5 ) in European Journal of Medicinal Chemistry. Keywords: antiviral HBV capsid protein inhibitor aminothiazole preparation structure activity. We’ll tell you more about this compound (cas:6684-39-5).

The capsid assembly is an essential step for Hepatitis B Virus (HBV) life cycle and is an important target for anti-HBV drug development. In this report, we identified a hit compound with aminothiazole structure by the high throughput screening (HTS) which inhibited the interaction of HBV capsid protein within the cells. The structure hopping and SAR studies of the hit compound afforded compound 79 with potent anti-HBV replication activity and good basic drug-like properties. The working mechanism studies showed that compound 79 could bind to the similar binding site of known HBV capsid inhibitor with heteroaryldihydropyrimidine (HAP) scaffold, through similar hydrophobic interactions but with a different hydrogen bond. This compound exerted potent inhibitory effect upon HBV production, either in cell culture or in mice with no obvious acute toxicity. We propose that further development of this compound could lead to novel potent anti-HBV inhibitors that target HBV capsid assembly.

As far as I know, this compound(6684-39-5)Computed Properties of C5H3Cl2NO2S can be applied in many ways, which is helpful for the development of experiments. Therefore many people are doing relevant researches.

Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Recommanded Product: 111-24-0. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 1,5-Dibromopentane, is researched, Molecular C5H10Br2, CAS is 111-24-0, about A new polar perovskite coordination network with azaspiroundecane as A-site cation. Author is Burger, Stefan; Kronawitter, Silva; Bostroem, Hanna L. B.; Zareba, Jan K.; Kieslich, Gregor.

ABX3 perovskite coordination networks are a rapidly growing sub-class of crystalline coordination networks. At present, synthetic efforts in the field are dominated using com. available building blocks, leaving the potential for tuning properties via targeted compositional changes largely untouched. Here the authors apply a rational crystal engineering approach, using 6-azaspiro[5.5]undecane ([ASU]+) as A-site cation for the synthesis of the polar perovskite [ASU][Cd(C2N3)3].

As far as I know, this compound(111-24-0)Recommanded Product: 111-24-0 can be applied in many ways, which is helpful for the development of experiments. Therefore many people are doing relevant researches.

Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

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: 1,5-Dibromopentane, is researched, Molecular C5H10Br2, CAS is 111-24-0, about Ether- and Thioether-Linked Naphthalene-Based Liquid-Crystal Dimers: Influence of Chalcogen Linkage and Mesogenic-Arm Symmetry on the Incidence and Stability of the Twist-Bend Nematic Phase.Category: chiral-nitrogen-ligands.

The twist-bend nematic (NTB) phase with a heliconical nanostructure of the local director generating symmetry breaking by achiral bent-shaped mols. is a hot topic of current liquid-crystal science. As opposed to the most common methylene-linked dimers, this study demonstrates chalcogen ether- and/or thioether-linked 6-(4-cyanophenyl)-2-naphthyl-based liquid-crystal dimers with sym. and asym. π-conjugated mesogenic-arm structures that exhibit the NTB phase. Although the sym. bis(ether)-linked dimer exhibits only the conventional nematic (N) phase, the asym. bis(ether)-linked dimer can form the NTB phase. All thioether-linked dimers form the NTB phase, wherein the dimers with asym. arms vitrify in the NTB phase on cooling to room temperature The phase transitions are discussed in terms of the chalcogen linkage combination, mesogenic-arm symmetry, and spacer length. It is revealed that thioether-linked dimers based on asym. π-conjugated mesogenic arms with terminal cyano groups are highly beneficial for the realization of materials that form a wide range of NTB phases and glassy NTB states at room temperature

This literature about this compound(111-24-0)Category: chiral-nitrogen-ligandshas given us a lot of inspiration, and I hope that the research on this compound(1,5-Dibromopentane) can be further advanced. Maybe we can get more compounds in a similar way.

Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis