Day: April 2, 2022

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.Al-Janabi, Emaad M. A.; Hatshan, Mohammad R.; Adil, Syed Farooq; Kadhum, Wesam R.; Al-Jibori, Subhi A.; Faihan, Ahmed S.; Al-Janabi, Ahmed S. researched the compound: 1,2-Bis(diphenylphosphino)ethane( cas:1663-45-2 ).Synthetic Route of C26H24P2.They published the article 《Spectroscopic, antibacterial and anti-cancer studies of new platinum(II)-diethyldithiocarbamate mixed ligand complexes with phosphine or amine ligands》 about this compound( cas:1663-45-2 ) in Journal of Molecular Structure. Keywords: platinum diethyldithiocarbamate phosphine amine complex preparation antibacterial antitumor activity. We’ll tell you more about this compound (cas:1663-45-2).

A series of new platinum(II) mixed ligand complexes of diethyldithiocarbamate (Et2DT) and phosphine or amine ligands of the type [Pt(Et2DT)2(diphosphine)] (3-6), [Pt(Et2DT)2(diamine)](7-8), [Pt(Et2DT)2(PPh3)2] (9) and [Pt(Et2DT)2(SPPh3)2](10) have been prepared in good yield and fully characterized by elemental anal., conductivity measurements and spectroscopic data (i.r., 1H, 31P-{1H} nmr). Our interest in these types of complexes are based on the fact that these complexes are known for their promising biol. activity, and could possess interesting coordination modes, which are poorly represented in the literature. Therefore, the prepared complexes were tested for their anti-bacterial against three types of pathogenic bacteria namely S. aureus, E. coli, and p. aeruginosa. In addition, four of the prepared complexes were screened for their anti-cancer activity against lung cancer cell lines, and that the [Pt(Et2DT)2(bipy)] was significantly more potent with IC50 value is 1.0 ± 0.2μM, but the [Pt(Et2DT)2(dppf)] was practically inactive in the selected dose range with IC50 value is 32.0 ± 3.0μM.

As far as I know, this compound(1663-45-2)Synthetic Route of C26H24P2 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 preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 1,5-Dibromopentane( cas:111-24-0 ) is researched.Reference of 1,5-Dibromopentane.Qiu, Shaotong; Gao, Xiang; Zhu, Shifa published the article 《Dirhodium(II)-catalysed cycloisomerization of azaenyne: rapid assembly of centrally and axially chiral isoindazole frameworks》 about this compound( cas:111-24-0 ) in Chemical Science. Keywords: aromatic azaenyne dirhodium catalyst diastereoselective enantioselective regioselective cycloisomerization; aryl isoindazole preparation. Let’s learn more about this compound (cas:111-24-0).

A dirhodium(II)-catalyzed asym. cycloisomerization reaction of azaenynes through a cap-tether synergistic modulation strategy, which represents the first catalytic asym. cycloisomerization of azaenynes. This reaction is highly challenging because of its inherent strong background reaction leading to racemate formation and the high capability of coordination of the nitrogen atom resulting in catalyst deactivation. Varieties of centrally chiral isoindazole derivatives was prepared in up to 99 : 1 d.r., 99 : 1 er and 99% yield and diverse enantiomerically enriched atropisomers bearing two five-membered heteroaryls was accessed by using an oxidative central-to-axial chirality transfer strategy. The tethered nitrogen atom incorporated into the starting materials enabled easy late-modifications of the centrally and axially chiral products via C-H functionalizations, which further demonstrated the appealing synthetic utilities of this powerful asym. cyclization.

This literature about this compound(111-24-0)Reference of 1,5-Dibromopentanehas 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

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 Preparation and aminolysis of 4-hydroxyquinazoline-2-sulfonic acid, published in 1965, which mentions a compound: 20198-19-0, mainly applied to , Category: chiral-nitrogen-ligands.

A saturated solution of KMnO4 is added to a solution of 8.9 g. 2-mercapto-4-hydroxyquinazoline (I) and 28 g. KOH in 100 ml. H2O at 45°, the mixture filtered, and the filtrate cooled to 0°. AcOH is added to a pH 6.5, the whole cooled to -5°, and the precipitate filtered off, and recrystallized from 70% EtOH at 0° to give a 60% yield of K 4-hydroxyquinazoline-2-sulfonate (II) (no m.p.). II is adjusted with HCl to pH 4 and heated to 100° to yield 2,4-dihydroxyquinazoline, m. 348-50°. II (2.64 g.) in 6 ml. of 2M aqueous Me2NH heated 4 hrs. at 130° gives 1.74 g. of 2-dimethylamino-4-hydroxyquinazoline (III), m. 244-6°. III.HCl m. 275°. The following analogs (IV) of III were prepared (R, % yield, m.p., and m.p. Ac derivative given): H, 90.6, 315-16°, 278-80°; Me, 74.2, 275-6°, 194-6°; Et, 82.9, 231-2°, 120-2°; Pr, 84.5, 199-200°, 118-19°; Bu, 88.4, 187-8°, 110-12°; Ph, 89.7, 260-3°, 203-4°; CH2Ph, 92.2, 214-15°, 124-5°; C6H4OMe-p, 85.7, 271-2°, 204-5°; C6H4Me-p, 91.2, 268-70°, 206-9°; cyclohexyl, 32.0, 209-11°, 204-5°; CH2CH2OH, 96.0,249-50°, -; 1-pyrrolidyl 73.2, 223-4°, -.

This literature about this compound(20198-19-0)Category: chiral-nitrogen-ligandshas given us a lot of inspiration, and I hope that the research on this compound(2-Aminoquinazolin-4(3H)-one) 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

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: 3411-48-1, is researched, Molecular C30H21P, about Structural and photophysical characterization of gold(I) complexes bearing naphthyl chromophores, the main research direction is gold chloro complex naphthylphosphine naphthyl isonitrile preparation crystal structure; fluorescence gold chloro complex naphthylphosphine naphthyl isonitrile; phosphorescence gold chloro complex naphthylphosphine naphthyl isonitrile.HPLC of Formula: 3411-48-1.

The authors prepared two chlorido-Au(I) complexes L-Au-Cl bearing a naphthyl moiety. Complex 1 with L = tris(1-naphthyl)phosphine shows standard linear coordination without further aggregation in the solid state. Complex 2 with L = 2-naphthyl isonitrile is engaged in a complex network of aurophilic and π-π interactions. The two complexes show similar luminescence behavior in solution at room temperature with both intraligand fluorescence and phosphorescence. At 77 K the emission spectra are dominated by intraligand phosphorescence, which is typical of Au complexes with extended π-chromophores.

This literature about this compound(3411-48-1)HPLC of Formula: 3411-48-1has given us a lot of inspiration, and I hope that the research on this compound(Tri(naphthalen-1-yl)phosphine) 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

SDS of cas: 1663-45-2. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 1,2-Bis(diphenylphosphino)ethane, is researched, Molecular C26H24P2, CAS is 1663-45-2, about Carboxylation of a Palladacycle Formed via C(sp3)-H Activation: Theory-Driven Reaction Design. Author is Kanna, Wataru; Harabuchi, Yu; Takano, Hideaki; Hayashi, Hiroki; Maeda, Satoshi; Mita, Tsuyoshi.

Theory-driven organic synthesis is a powerful tool for developing new organic transformations. A palladacycle(II), generated from 8-methylquinoline via C(sp3)-H activation, is frequently featured in the scientific literature, albeit that the reactivity toward CO2, an abundant, inexpensive, and non-toxic chem., remains elusive. Authors have theor. discovered potential carboxylation pathways using the artificial force induced reaction (AFIR) method, a d.-functional-theory (DFT)-based automated reaction path search method. The thus obtained results suggest that the reduction of Pd(II) to Pd(I) is key to promote the insertion of CO2. Based on these computational findings, they employed various one-electron reductants, such as Cp*2Co, a photoredox catalyst under blue LED irradiation, and reductive electrolysis ((+)Mg/(-)Pt), which afforded the desired carboxylated products in high yields. After screening phosphine ligands under photoredox conditions, they discovered that bidentate ligands such as dppe promoted this carboxylation efficiently, which was rationally interpreted in terms of the redox potential of the Pd(II)-dppe complex as well as on the grounds of DFT calculations They are convinced that these results could serve as future guidelines for the development of Pd(II)-catalyzed C(sp3)-H carboxylation reactions with CO2.

This literature about this compound(1663-45-2)SDS of cas: 1663-45-2has given us a lot of inspiration, and I hope that the research on this compound(1,2-Bis(diphenylphosphino)ethane) 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

Fernandes, Daniel J.; Cardenas, Rafael M.; Bertino, Joseph R.; Hynes, John B. published an article about the compound: 2-Aminoquinazolin-4(3H)-one( cas:20198-19-0,SMILESS:O=C1NC(N)=NC2=C1C=CC=C2 ).Formula: C8H7N3O. 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:20198-19-0) through the article.

A series of title compounds (I; Z = NHCH2, CH2NH, CH2NMe, CH2S, CH2O, (CH2)2, CHONCH2) were evaluated as inhibitors of colon adenocarcinoma and the folate-dependent enzymes, thymidylate synthase  [9031-61-2] and dihydrofolate reductase  [9002-03-3]. Of the drugs tested, IAHQ (I; Z = NHCH2) [56239-21-5], when administered at 85 mg/kg on days 2 and 10 after tumor implantation, delayed the growth of colon tumor Number 38, and resulted in 6 of 20 tumor-free animals at 90 days. In contrast, methotrexate had no effect on the growth of colon tumor Number 38 at maximally tolerated doses. IAHQ was also active against human colon adenocarcinoma cells (HCT-8) in tissue culture, requiring a concentration of 5 × 10-7 M to inhibit cell growth by 50% after 72 h continuous exposure.

This literature about this compound(20198-19-0)Formula: C8H7N3Ohas given us a lot of inspiration, and I hope that the research on this compound(2-Aminoquinazolin-4(3H)-one) 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

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.Safety of 2-(7-Bromo-1H-indol-3-yl)acetic acid. The article 《Secondary spacer modulated assembly of polyoxometalate based metal-organic frameworks》 in relation to this compound, is published in Dalton Transactions. Let’s take a look at the latest research on this compound (cas:14389-12-9).

To study the influence of a secondary spacer on the resulting structures of POMOFs containing pytz, five new compounds with different dimensionalities, [Cu5(2-pytz)6(H2O)4][SiMo12O40]·3H2O (1), [Cu3(2-pytz)4bipy][H2SiMo12O40]·bipy (2), [Cu3(2-pytz)2(bipy)4(H2O)6][H4SiW12O40]2·6H2O (3), [Cu2(2-pytz)(phen)(OH)]2[SiW12O40]·H2O (4), [Cu3(4-pytz)4(H2O)4][H2SiW12O40]·2H2O (5) (pytz = pyridyltetrazole), were synthesized. When only 2-pytz was employed, compound 1 with a 3D framework was obtained, whereas when the secondary spacers (4,4′-bipy, phen and 4-pytz) were introduced into the reaction system of 1, compounds 2-5 were obtained and exhibit a broad range of structures, including 0D, 1D, 2D and 3D frameworks. It can be observed from the architectures of compounds 1-5 that the secondary spacers have a great effect on the structures of the MOFs, which gave various dimensional POMOF compounds Addnl., photocatalytic experiments of 1-5 for the photocatalytic degradation of RhB under UV irradiation were also studied.

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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

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, Acta Crystallographica, Section E: Crystallographic Communications called Crystal structure of 1-[(6-chloropyridin-3-yl)sulfonyl]-1,2,3,4-tetrahydroquinoline, Author is Jeyaseelan, S.; Rajegowda, H. R.; Britto Dominic Rayan, R.; Raghavendra Kumar, P.; Palakshamurthy, B. S., which mentions a compound: 6684-39-5, SMILESS is ClC1=NC=C(C=C1)[S](=O)(=O)Cl, Molecular C5H3Cl2NO2S, HPLC of Formula: 6684-39-5.

The tetrahydropyridine ring of the quinoline system in the title compound, C14H13ClN2O2S, adopts a half-chair conformation with the bond-angle sum at the N atom being 350.0°. The dihedral angle between the least-squares planes of the two aromatic rings is 50.13 (11)°. In the crystal, inversion dimers linked by pairs of C-H···O hydrogen bonds generate R 2 2(10) loops. Addnl. intermol. C-H···O hydrogen bonds generate C(7) chains along [100].

This literature about this compound(6684-39-5)HPLC of Formula: 6684-39-5has given us a lot of inspiration, and I hope that the research on this compound(2-Chloro-5-pyridinesulfonyl chloride) 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

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: 14389-12-9, is researched, Molecular C6H5N5, about Syntheses Study of Keggin POM Supporting MOFs System, the main research direction is preparation silver pyridyltetrazolate molybdate tungstate Keggin MOF; crystal structure silver pyridyltetrazolate molybdate tungstate Keggin MOF; luminescence silver pyridyltetrazolate molybdate tungstate Keggin MOF.Reference of 5-(4-Pyridyl)-1H-tetrazole.

To study the influence of reactive conditions on the structures of Keggin POM supporting metal-organic frameworks (MOFs), five new compounds, [Ag6(2-pytz)4(H2O)2][HPMo12O40] (1), {[Ag14(2-pytz)12(H2O)4][H2PMo12O40]2}·3H2O (2), {[Ag6(2-pytz)4(H2O)4][H2SiW12O40]}·6H2O (3), {[Ag3(3-pytz)2]2·[AgPMo12O40]}·2H2O (4), [Ag6(4-pytz)4][HPMo12O40] (5) [pytz = 5-(pyridyl)tetrazolate], were hydrothermally synthesized by tuning the reactive species and pH values and characterized by routine method and single-crystal x-ray crystallog. Although compounds 1-5 all show the POM supporting 3-dimensional MOFs skeleton, MOFs exhibit diverse structures and POMs play different supporting functions, more specifically, pseudo POM chains supporting MOFs in 1 and 2, isolated POM spheres supporting MOFs in 3, true POM chains supporting MOFs in 4, and pseudo POM layers supporting MOFs in 5. The roles of the pH value, pytz derivatives, and the Keggin homologs in the formation of the POM supporting MOFs are discussed. The photoluminescence properties of compounds 1-3 were studied in the solid state at room temperature

This literature about this compound(14389-12-9)Reference of 5-(4-Pyridyl)-1H-tetrazolehas given us a lot of inspiration, and I hope that the research on this compound(5-(4-Pyridyl)-1H-tetrazole) 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

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