Month: April 2022

COA of Formula: C6H5N5. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 5-(4-Pyridyl)-1H-tetrazole, is researched, Molecular C6H5N5, CAS is 14389-12-9, about A rapid and green synthetic approach for hierarchically assembled porous ZnO nanoflakes with enhanced catalytic activity. Author is Sinhamahapatra, Apurba; Giri, Arnab Kanti; Pal, Provas; Pahari, Sandip Kumar; Bajaj, Hari C.; Panda, Asit Baran.

Three dimensionally (3D) assembled hierarchical porous ZnO structures are of key importance for their applications in sensors, lithium-ion batteries, solar cells and in catalysis. Here, the controlled synthesis of 3D hierarchically porous ZnO architectures constructed of two dimensional (2D) nano-sheets through the calcination of a hydrozincite [Zn5(CO3)2(OH)6] intermediate is presented. The intermediate 3D hierarchical hydrozincite has been synthesized by a novel organic surfactant and solvent free aqueous protocol at room temperature using an aqueous solution of ammonium carbonate and laboratory grade bulk ZnO in a short time (20-30 min). The amount of carbonate and the reaction temperature play a crucial role in the formation of the 3D hierarchical morphol. and on the basis of the exptl. results a probable reaction mechanism is proposed. On calcination, the synthesized 3D hierarchical hydrozincite resulted in ZnO with an almost identical morphol. to the parental hydrozincite. On decomposition a porous structure having a surface area of 44 M2 g-1 is obtained. The synthesized hierarchical ZnO morphol. exhibits an improved catalytic activity for the synthesis of 5-substituted-1H-tetrazoles with different nitriles and sodium azide than that of nanocrystalline ZnO and bulk ZnO, as well as other developed solid catalysts. The catalyst is easily recyclable without a significant loss in catalytic activity.

There is still a lot of research devoted to this compound(SMILES：C1(C2=NN=NN2)=CC=NC=C1)COA of Formula: C6H5N5, and with the development of science, more effects of this compound(14389-12-9) can be discovered.

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.Wang, Wentian; Zhang, Lu; Morlock, Lorraine; Williams, Noelle S.; Shay, Jerry W.; De Brabander, Jef K. researched the compound: 2-Chloro-5-pyridinesulfonyl chloride( cas:6684-39-5 ).COA of Formula: C5H3Cl2NO2S.They published the article 《Design and Synthesis of TASIN Analogues Specifically Targeting Colorectal Cancer Cell Lines with Mutant Adenomatous Polyposis Coli (APC)》 about this compound( cas:6684-39-5 ) in Journal of Medicinal Chemistry. Keywords: preparation TASIN analog targeting colorectal cancer. We’ll tell you more about this compound (cas:6684-39-5).

Despite advances in targeted anticancer therapies, there are still no small-mol.-based therapies available that specifically target colorectal cancer (CRC) development and progression, the second leading cause of cancer deaths. We previously disclosed the discovery of truncating adenomatous polyposis coli (APC)-selective inhibitor 1 (TASIN-1), a small mol. that specifically targets colorectal cancer cells lines with truncating mutations in the adenomatous polyposis coli (APC) tumor suppressor gene through inhibition of cholesterol biosynthesis. Here, we report a medicinal chem. evaluation of a collection of TASIN analogs and activity against colon cancer cell lines and an isogenic cell line pair reporting on the status of APC-dependent selectivity. A number of potent and selective analogs were identified, including compounds with good metabolic stability and pharmacokinetic properties. The compounds reported herein represent a first-in-class genotype-selective series that specifically target apc mutations present in the majority of CRC patients and serve as a translational platform toward a targeted therapy for colon cancer.

There is still a lot of research devoted to this compound(SMILES：ClC1=NC=C(C=C1)[S](=O)(=O)Cl)COA of Formula: C5H3Cl2NO2S, and with the development of science, more effects of this compound(6684-39-5) can be discovered.

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: 1,5-Dibromopentane, is researched, Molecular C5H10Br2, CAS is 111-24-0, about Acetylcholinesterase inhibition of diversely functionalized quinolinones for alzheimer’s disease therapy.

The synthesis and cholinesterase (ChE)/monoamine oxidase (MAO) inhibition of quinolinones I [R = 2-diethylaminoethyl, 1-methyl-4-piperidyl, 3-morpholinopropyl, etc.] and dihydroquinolinones II [R1 = 1-methyl-4-piperidyl, 2-morpholinoethyl, 2-(4-isopropylpiperazin-1-yl)ethyl, etc.] designed as potential multitarget small mols. (MSM) for alzheimer’s disease therapy was reported.. None of them showed significant human recombinant MAO inhibition, but compounds I [R = 4-(4-isopropylpiperazin-1-yl)butyl, 5-(4-isopropylpiperazin-1-yl)pentyl] and compound II [R1 = 4-(4-isopropylpiperazin-1-yl)butyl] displayed promising human recombinant acetylcholinesterase (hrAChE) and butyrylcholinesterase (hrBuChE) inhibition. In particular, compound I [R = 4-(4-isopropylpiperazin-1-yl)butyl] was found to be a potent and quite selective non-competitive inhibitor of hrAChE (IC50 = 0.29μM), with Ki value in nanomolar range (79 nM). Pertinent docking anal. confirmed this result, suggesting that this ligand was an interesting hit for further investigation.

There is still a lot of research devoted to this compound(SMILES：BrCCCCCBr)Category: chiral-nitrogen-ligands, and with the development of science, more effects of this compound(111-24-0) can be discovered.

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

Name: 2-Chloro-5-pyridinesulfonyl chloride. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 2-Chloro-5-pyridinesulfonyl chloride, is researched, Molecular C5H3Cl2NO2S, CAS is 6684-39-5, about An experimental and theoretical dipole moment study of 2-chloropyridine-5-sulfonyl chloride. Author is Lumbroso, H.; Montoneri, E.; Pappalardo, G. C..

Anal. of the dipole moment (2.00 D) of 2-chloropyridine-5-sulfonly chloride in benzene at 30° supported a model in which the C(5)-SCl group is rotated by 40° from the 2-chloro-1-pyridyl group. Such a model, with the S Cl atom close to the 1-azanitrogen atom, can be explained by interplay of 2 conflicting factors, namely sulfonylchloride-arene conjugation and lesser repulsion between 1 of the O atoms and the aza N atom.

There is still a lot of research devoted to this compound(SMILES：ClC1=NC=C(C=C1)[S](=O)(=O)Cl)Name: 2-Chloro-5-pyridinesulfonyl chloride, and with the development of science, more effects of this compound(6684-39-5) can be discovered.

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, Nanoscale Advances called Halogen effects on the electronic and optical properties of Au13 nanoclusters, Author is Gao, Ze-Hua; Dong, Jia; Zhang, Qian-Fan; Wang, Lai-Sheng, the main research direction is gold13 nanocluster halogen effect electronic optical property.Synthetic Route of C26H24P2.

We report an exptl. and theor. investigation of the electronic and optical properties of a series of icosahedral Au13 nanoclusters, protected using different halogen ligands (Cl, Br, and I), as well as 1,2-bis(diphenylphosphino)ethane (dppe) ligands. All three clusters are comprised of the same Au13 kernel with two halogens coordinated to the poles of the icosahedral cluster along with five dppe ligands. UV-vis absorption spectra indicate a systematic red shift from Cl to Br to I, as well as a sudden enhancement of the second excitonic peak for the I-coordinated cluster. D. functional theory (DFT) calculations suggest that all clusters possess a wide HOMO-LUMO energy gap of ~1.79 eV and are used to assign the first two excitonic bands. Frontier orbital analyses reveal several HOMO → LUMO transitions involving halogen-to-metal charge transfers. For the I-coordinated cluster, more complicated I-to-metal charge transfers give rise to different excitation features observed exptl. The current findings show that halogen ligands play important roles in the electronic structures of gold clusters and can be utilized to tune the optical properties of the clusters.

There is still a lot of research devoted to this compound(SMILES：P(CCP(C1=CC=CC=C1)C2=CC=CC=C2)(C3=CC=CC=C3)C4=CC=CC=C4)Synthetic Route of C26H24P2, and with the development of science, more effects of this compound(1663-45-2) can be discovered.

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

Dong, Jie; Yuan, Xiang-Ai; Yan, Zhongfei; Mu, Liying; Ma, Junyang; Zhu, Chengjian; Xie, Jin published an article about the compound: Tri(naphthalen-1-yl)phosphine( cas:3411-48-1,SMILESS:C1=CC2=C(C=C1)C(=CC=C2)P(C1=CC=CC2=C1C=CC=C2)C1=CC=CC2=C1C=CC=C2 ).Name: Tri(naphthalen-1-yl)phosphine. 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:3411-48-1) through the article.

Transition-metal-catalyzed, redox-neutral dehydrosilylation of alkenes is a long-standing challenge in organic synthesis, with current methods suffering from low selectivity and narrow scope. The authors report a general and simple method for the Mn-catalyzed dehydrosilylation and hydrosilylation of alkenes, with Mn2(CO)10 as a catalyst precursor, by using a ligand-tuned metalloradical reactivity strategy. This enables versatility and controllable selectivity with a 1:1 ratio of alkenes and silanes, and the synthetic robustness and practicality of this method are demonstrated using complex alkenes and light olefins. The selectivity of the reaction was studied using d. functional theory calculations, showing the use of an iPrPNP ligand to favor dehydrosilylation, while a JackiePhos ligand favors hydrosilylation. The reaction is redox-neutral and atom-economical, exhibits a broad substrate scope and excellent functional group tolerance, and is suitable for various synthetic applications on a gram scale. [graphic not available: see fulltext].

There is still a lot of research devoted to this compound(SMILES：C1=CC2=C(C=C1)C(=CC=C2)P(C1=CC=CC2=C1C=CC=C2)C1=CC=CC2=C1C=CC=C2)Name: Tri(naphthalen-1-yl)phosphine, and with the development of science, more effects of this compound(3411-48-1) can be discovered.

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