Month: April 2022

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Ionic polyureas-a novel subclass of poly(ionic liquid)s for CO2 capture》. Authors are Morozova, Sofia M.; Lozinskaya, Elena I.; Sardon, Haritz; Suarez-Garcia, Fabian; Vlasov, Petr S.; Vaudemont, Regis; Vygodskii, Yakov S.; Shaplov, Alexander S..The article about the compound:1,5-Dibromopentanecas:111-24-0,SMILESS:BrCCCCCBr).SDS of cas: 111-24-0. Through the article, more information about this compound (cas:111-24-0) is conveyed.

The growing concern for climate change and global warming has given rise to investigations in various research fields, including one particular area dedicated to the creation of solid sorbents for efficient CO2 capture. In this work, a new family of poly(ionic liquid)s (PILs) comprising cationic polyureas (PURs) with tetrafluoroborate (BF4) anions has been synthesized. Condensation of various diisocyanates with novel ionic diamines and subsequent ion metathesis reaction resulted in high molar mass ionic PURs (Mw = 12 ÷ 173 x 103 g/mol) with high thermal stability (up to 260 °C), glass transition temperatures in the range of 153-286 °C and remarkable CO2 capture (10.5-24.8 mg/g at 0 °C and 1 bar). The CO2 sorption was found to be dependent on the nature of the cation and structure of the diisocyanate. The highest sorption was demonstrated by tetrafluoroborate PUR based on 4,4′-methylene-bis(cyclohexyl isocyanate) diisocyanate and aromatic diamine bearing quinuclidinium cation (24.8 mg/g at 0 °C and 1 bar). It is hoped that the present study will inspire novel design strategies for improving the sorption properties of PILs and the creation of novel effective CO2 sorbents.

Compound(111-24-0)SDS of cas: 111-24-0 received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(1,5-Dibromopentane), if you are interested, you can check out my other related articles.

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

Electric Literature of C5H10Br2. 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: 1,5-Dibromopentane, is researched, Molecular C5H10Br2, CAS is 111-24-0, about 3,28-Diacetoxylup-20(29)-ene-30-oic acid and its ω-bromoalkyl esters. Author is Ponomaryov, D. V.; Grigor’eva, L. R.; Nemtarev, A. V.; Tsepaeva, O. V.; Mironov, V. F.; Gnezdilov, O. I.; Antipin, I. S..

A convenient procedure was developed for the synthesis of 3β,28-diacetoxylup-20(29)-en-30-oic acid I (R = H) via oxidation of 3β,28-di-O-acetylbetulin with selenium dioxide in aqueous ethanol on heating, followed by oxidation of 3β,28-diacetoxylup-20(29)-en-30-al thus formed with sodium chlorite in tert-Bu alc. The alkylation of the acid with 1,3-dibrompropane and 1,5-dibromopentane in boiling acetonitrile in the presence of potassium carbonate afforded the corresponding ω-bromoalkyl esters I [R = (CH2)3Br, (CH2)5Br] in high yields.

Compound(111-24-0)Electric Literature of C5H10Br2 received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(1,5-Dibromopentane), if you are interested, you can check out my other related articles.

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

Application of 20198-19-0. 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: 2-Aminoquinazolin-4(3H)-one, is researched, Molecular C8H7N3O, CAS is 20198-19-0, about Fluorescence characteristics of 3-aminoisocarbostyril derivatives (3). Fluorescence characteristics of isocarbostyrils and related compounds. Author is Takadate, Akira; Yoshimura, Naonori; Goya, Shujiro; Matsumoto, Hitoshi.

The fluorescence spectra of I (R = H, H2N, PhNH; Z = NH, O) and II were studied with respect to their structures. The maximum depended on such partial structures as lactam, lactone, or guanidino moieties. All compounds except II (R = PhNH2) (III) exhibited high fluorescence in EtOH. III and 2-anilino-4-methoxyquinazoline showed significant increased fluorescence in less polar solvents such as C6H6 and cyclohexane.

Compound(20198-19-0)Application of 20198-19-0 received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(2-Aminoquinazolin-4(3H)-one), if you are interested, you can check out my other related articles.

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 Thermogravimetric and kinetic study of new bis(iminophosphorane)ethane solvates, published in 2020-08-31, which mentions a compound: 1663-45-2, mainly applied to bisiminophosphorane solvate preparation thermal stability crystal structure, Product Details of 1663-45-2.

Thermal and crystallog. characterization of one solvent-free bis(iminophosphorane)ethane (BIPE) form and three solvates with acetonitrile (ACN), DMSO (DMSO) and toluene is presented. Thermal behaviors of new compounds indicate that the solvent is removed differently from the BIPE structure, accordingly with the stoichiometric solvent mol. amount incorporated. Thus, the solvent-free BIPE reveals high thermal stability up to 315°C, while BIPE solvates have a similar pattern behavior with low stability about 130°C. The kinetic parameters of the thermal decomposition process were determined by three different methods Flynn-Wall-Ozawa, Kissinger-Akahira-Sunose and nonparametric kinetic. Crystallog. data revealed that the solvent plays the role of space filler without strong interactions with host mols. Guest-free BIPE, BIPE0.5ACN and BIPE0.35DMSO crystallized in monoclinic C2/c (15) space group, while BIPETOLUENE in a triclinic P – 1 (2) one. Crystallog. and thermogravimetric data show a good correlation between mol. structures and activation energies.

Compound(1663-45-2)Product Details of 1663-45-2 received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(1,2-Bis(diphenylphosphino)ethane), if you are interested, you can check out my other related articles.

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.Svahn, Noora; Moro, Artur J.; Roma-Rodrigues, Catarina; Puttreddy, Rakesh; Rissanen, Kari; Baptista, Pedro V.; Fernandes, Alexandra R.; Lima, Joao Carlos; Rodriguez, Laura researched the compound: Tri(naphthalen-1-yl)phosphine( cas:3411-48-1 ).Quality Control of Tri(naphthalen-1-yl)phosphine.They published the article 《The Important Role of the Nuclearity, Rigidity, and Solubility of Phosphane Ligands in the Biological Activity of Gold(I) Complexes》 about this compound( cas:3411-48-1 ) in Chemistry – A European Journal. Keywords: gold ethynylaniline acetylide phosphine complex preparation antitumor agent; cytotoxicity selectivity gold ethynylaniline acetylide phosphine complex; crystal structure gold ethynylaniline acetylide phosphine complex; mol structure gold ethynylaniline acetylide phosphine complex; X-ray diffraction; antitumor agents; apoptosis; biological activity; gold. We’ll tell you more about this compound (cas:3411-48-1).

A series of 4-ethynylaniline gold(I) complexes H2NC6H4CCAuL containing monophosphines (2, L = 1,3,5-triaza-7-phosphaadamantane, pta; 3, L = 3,7-diacetyl-1,3,7-triaza-5-phosphabicyclo[3.3.1]nonane; 4-6, L = tri-1-naphthylphosphine, PPh3, PEt3), diphosphines [7, L = 1/2 bis(diphenylphosphino)acetylene (dppa), 8, 1/2 L = trans-1,2-bis(diphenylphosphino)ethene (dppet); 9, 1/2 L = dppe; 10, 1/2 L = dppp] ligands have been synthesized and their efficiency against tumor cells evaluated. The cytotoxicity of complexes 2-10 was evaluated in human colorectal (HCT116) and ovarian (A2780) carcinoma as well as in normal human fibroblasts. All the complexes showed a higher antiproliferative effect in A2780 cells, with the cytotoxicity decreasing in the following order 5 > 6 = 9 = 10 > 8 > 2 > 4 > 7 > 3. Complex 4 stands out for its very high selectivity towards ovarian carcinoma cells (IC50=2.3 μM) compared with colorectal carcinoma and normal human fibroblasts (IC50>100 μM), which makes this complex very attractive for ovarian cancer therapy. Its cytotoxicity in these cells correlates with the induction of the apoptotic process and an increase of intracellular reactive oxygen species (ROS). The effects of the nuclearity, rigidity, and solubility of these complexes on their biol. activity were also analyzed. X-ray crystal structure determination allowed the identification of short N-H…π contacts as the main driving forces for the three-dimensional packing in these mols.

Compound(3411-48-1)Quality Control of Tri(naphthalen-1-yl)phosphine received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(Tri(naphthalen-1-yl)phosphine), if you are interested, you can check out my other related articles.

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 three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 5-(4-Pyridyl)-1H-tetrazole(SMILESS: C1(C2=NN=NN2)=CC=NC=C1,cas:14389-12-9) is researched.Product Details of 707-61-9. The article 《Porous Nitrogen Rich Cadmium-Tetrazolate Based Metal Organic Framework (MOF) for H2 and CO2 Uptake》 in relation to this compound, is published in Crystal Growth & Design. Let’s take a look at the latest research on this compound (cas:14389-12-9).

The highly porous nitrogen rich metal organic framework [Cd3(4-TP)6] (Cd-4TP-1) was synthesized solvothermally from the predesigned organic building block 4-tetrazole pyridine (4-TP) and Cd(II) as metal center using DMF as solvent. Cd-4TP-1 has a three-dimensional porous architecture where all the binding sites of Cd(II) are exclusively occupied by the nitrogen atoms from the μ2-tetrazolyl group or the pyridyl functionality of the 4-TP ligands. Cd-4TP-1 has Brunauer-Emmett-Teller (BET) and Langmuir surface areas of 472.2 and 728.6 m2/g, resp., and shows 1.1% H2 (77 K) and 2.7 mmol/g CO2 uptake (273 K).

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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

Category: chiral-nitrogen-ligands. 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: Tri(naphthalen-1-yl)phosphine, is researched, Molecular C30H21P, CAS is 3411-48-1, about Hydrogen transfer. XXVII. Influence of ligands in tertiary phosphines on the rate of hydrogenation of olefines with rhodium complexes in homogenous solution.

The rate of homogeneous hydrogenation r of 1-hexene in the presence of various tertiary phosphine-RhCl complexes as catalysts is determined at 25-30° and discussed in relation to the substituents in the phosphines. The phosphine-Rh(I) complexes are prepared from μ-dichlorobis(1,5-hexadiene)dirhodium(I) and tertiary phosphines under H. Maximum r-values are observed for 1:2.2 Rh-phosphine molar ratio. Para substituents with donor quality in PPh3 increase r, but electrophilic substituents in the same position decrease r. Aliphatic ligands in the tertiary phosphines decrease r; an increase of r is only observed for bulk ligands, e.g., in the case of MePPhBu-tert.

Compound(3411-48-1)Category: chiral-nitrogen-ligands received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(Tri(naphthalen-1-yl)phosphine), if you are interested, you can check out my other related articles.

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: 1663-45-2, is researched, SMILESS is P(CCP(C1=CC=CC=C1)C2=CC=CC=C2)(C3=CC=CC=C3)C4=CC=CC=C4, Molecular C26H24P2Journal, Inorganic Chemistry Communications called Hydrogen storage capacity of novel mixed ligand complexes of lead(II): Molecular structure of [Pb2(tsac)4(μ-dppe)], Author is Al-Jibori, Subhi A.; Amen, Mohamed M.; Alheety, Mustafa A.; Karadag, Ahmet; Wagner, Christoph, the main research direction is lead phosphino aminobenzothiophene acetamidopyrimidine benzimidazolethiol hiosaccharinato complex preparation; crystal structure gas adsorption lead phosphino hiosaccharinato complex.Related Products of 1663-45-2.

[Pb(tsac)2H2O] was used as a synthon for the synthesis of lead(II) thiosaccharinate mixed ligand complexes with the tertiary phosphines; PPh3, Ph2P(CH2)nPPh2, n = 1, dppm; n = 2, dppe; n = 3, dppp or the heterocyclic; 2-aminobenzothiophene (abtH), 2-acetamidopyrimidine (aampH) and 2-benzimidazolethiol (bimsH). The prepared complexes were characterized using; IR, 1H-, 31P-{1H} NMR, molar conductivity, elemental anal. in addition, the crystal structure of [Pb2(tsac)4(μ-dppe)] was resolved by x-ray diffraction anal. of a single crystal. [Pb2(tsac)4(μ-dppe)] crystallizes in the triclinic space group P-1 a 9.0955(5), b 11.4197(6), c 15.3174(7) Å, Z = 2 and refined to R1 = 0.0422. Herein, thiosaccharine shows the ability to coordinate to lead(II) center in a variety of modes, which are monodentate, chelate- bidentate via a nitrogen atom and/ or a sulfur atom of the thiole group. Also, [Pb(tsac)2H2O] and [Pb2(tsac)4(μ-dppe)] were used to examine their ability to store hydrogen. [Pb(tsac)2H2O] and [Pb2(tsac)4(μ-dppe)] are able to store 0.29 and 1.12% H2, resp.

Compound(1663-45-2)Related Products of 1663-45-2 received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(1,2-Bis(diphenylphosphino)ethane), if you are interested, you can check out my other related articles.

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: 14389-12-9, is researched, SMILESS is C1(C2=NN=NN2)=CC=NC=C1, Molecular C6H5N5Journal, New Journal of Chemistry called Hierarchically porous AlPO-5-based microspheres as heterogeneous catalysts for the synthesis of 5-substituted 1H-tetrazoles via [3+2] cycloaddition, Author is Kong, Dan; Liu, Yanyan; Zhang, Juan; Li, Hongbian; Wang, Xiangyu; Liu, Guangyu; Li, Baojun; Xu, Zheng, the main research direction is tungsten mol sieve preparation WALPO cycloaddition catalyst nitrile azide; tetrazole preparation.Computed Properties of C6H5N5.

The research on the heterogeneous catalytic synthesis of tetrazole derivatives has attracted great attention. In this paper, a tungsten atom-containing AlPO-5 microporous mol. sieve (termed as WAlPO-5) was designed and synthesized by the incorporation of tungsten atoms into the AlPO-5 skeleton with triethylamine as a structure template from pseudoboehmite, H3PO4 and tungstophosphoric acid. The incorporation of tungsten atoms into the AlPO-5 skeleton (aluminophosphate zeolites) has been demonstrated by systematic characterizations. WAlPO-5 can be used as an efficient heterogeneous catalyst for the synthesis of 5-substituted 1H-tetrazoles by [3+2] cycloaddition from nitriles and sodium azide. As a novel heterogeneous catalyst, WAlPO-5 exhibits a high catalytic activity, a superior cycling stability and an excellent substrate applicability. The significant advantages of WAlPO-5, such as the simple procedure and the mild reaction conditions and as an alternative to those corrosive, hazardous and polluting homogeneous catalysts, warrant its potential application in industrial processes. The synthesis of the target compounds was achieved by a reaction of sodium azide with benzonitrile derivatives (aryl nitriles), 4-pyridinecarbonitrile (pyridine derivative). The title compounds thus formed included 5-phenyl-2H-tetrazole derivatives, 4-(2H-tetrazol-5-yl)pyridine.

Compound(14389-12-9)Computed Properties of C6H5N5 received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(5-(4-Pyridyl)-1H-tetrazole), if you are interested, you can check out my other related articles.

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 chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: Tri(naphthalen-1-yl)phosphine, is researched, Molecular C30H21P, CAS is 3411-48-1, about Discovery and Pharmacological Studies of 4-Hydroxyphenyl-Derived Phosphonium Salts Active in a Mouse Model of Visceral Leishmaniasis, the main research direction is phosphonium salts visceral Leishmaniasis pharmacokinetics antimonials antileishmanial.Quality Control of Tri(naphthalen-1-yl)phosphine.

We report the discovery of new 4-hydroxyphenyl phosphonium salt derivatives active in the submicromolar range (EC50 from 0.04 to 0.28μM, SI > 10) against the protozoan parasite Leishmania donovani. The pharmacokinetics and in vivo oral efficacy of compound 1 [(16-(2,4-dihydroxyphenyl)-16-oxohexadecyl)triphenylphosphonium bromide] in a mouse model of visceral leishmaniasis were established. Compound 1 reduced the parasite load in spleen (98.9%) and liver (95.3%) of infected mice after an oral dosage of four daily doses of 1.5 mg/kg. Mode of action studies showed that compound 1 diffuses across the plasma membrane, as designed, and targets the mitochondrion of Leishmania parasites. Disruption of the energetic metabolism, with a decrease of intracellular ATP levels as well as mitochondrial depolarization together with a significant reactive oxygen species production, contributes to the leishmanicidal effect of 1. Importantly, this compound was equally effective against antimonials and miltefosine-resistant clin. isolates of Leishmania infantum, indicating its potential as antileishmanial lead.

Compound(3411-48-1)Quality Control of Tri(naphthalen-1-yl)phosphine received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(Tri(naphthalen-1-yl)phosphine), if you are interested, you can check out my other related articles.

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