Category: 27841-33-4

Chakrabarti, Kaushik; Maji, Milan; Kundu, Sabuj published the artcile< Cooperative iridium complex-catalyzed synthesis of quinoxalines, benzimidazoles and quinazolines in water>, Related Products of 27841-33-4, the main research area is amine diol iridium complex catalyst condensation green chem; quinoxaline preparation; benzyl alc diamine iridium complex catalyst green chem; benzimidazole preparation; methylamino aniline benzyl alc iridium complex catalyst green chem; quinazoline preparation.

An efficient methodol. for the synthesis of a diverse class of N-heterocyclic moieties, such as quinoxalines, benzimidazoles and quinazolines, was developed in water using bio-renewable alcs. The quinoxalines were successfully synthesized from a wide range of diamines and nitroamines with diols in air. Interestingly, benzimidazoles and quinazolines were synthesized with excellent isolated yields without using any external base. Finally, the preparative scale synthesis of various N-heterocycles and pharmaceutically active quinoxalines established the practicability of this protocol. For this iridium system, a metal-ligand cooperative mechanism was proposed based on kinetic and DFT studies.

Green Chemistry published new progress about Aralkyl alcohols Role: PEP (Physical, Engineering or Chemical Process), PRP (Properties), RCT (Reactant), PROC (Process), RACT (Reactant or Reagent). 27841-33-4 belongs to class chlorides-buliding-blocks, and the molecular formula is C8H12N2O2, Related Products of 27841-33-4.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Troelsen, Nikolaj S.; Shanina, Elena; Gonzalez-Romero, Diego; Dankova, Daniela; Jensen, Ida S. A.; Sniady, Katarzyna J.; Nami, Faranak; Zhang, Hengxi; Rademacher, Christoph; Cuenda, Ana; Gotfredsen, Charlotte H.; Clausen, Mads H. published the artcile< The 3F Library: Fluorinated Fsp3-Rich Fragments for Expeditious 19F NMR Based Screening>, HPLC of Formula: 27841-33-4, the main research area is fluorine NMR screening drug discovery trifluoromethylated natural product; trifluoromethylated natural product library synthesis drug discovery; NMR spectroscopy; drug discovery; fluorine; molecular diversity; synthesis design.

Fragment-based drug discovery (FBDD) is a popular method in academia and the pharmaceutical industry for the discovery of early lead candidates. Despite its wide-spread use, the approach still suffers from laborious screening workflows and a limited diversity in the fragments applied. Presented here is the design, synthesis, and biol. evaluation of the first fragment library specifically tailored to tackle both these challenges. The 3F library of 115 fluorinated, Fsp3-rich fragments is shape diverse and natural-product-like with desirable physicochem. properties. The library is perfectly suited for rapid and efficient screening by NMR spectroscopy in a two-stage workflow of 19F NMR and subsequent 1H NMR methods. Hits against four diverse protein targets are widely distributed among the fragment scaffolds in the 3F library and a 67% validation rate was achieved using secondary assays. This collection is the first synthetic fragment library tailor-made for 19F NMR screening and the results demonstrate that the approach should find broad application in the FBDD community.

Angewandte Chemie, International Edition published new progress about [2+2] Cycloaddition reaction. 27841-33-4 belongs to class chlorides-buliding-blocks, and the molecular formula is C8H12N2O2, HPLC of Formula: 27841-33-4.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Sireesha, Reddymasu; Sreenivasulu, Reddymasu; Chandrasekhar, Choragudi; Jadav, Surender Singh; Pavani, Y.; Rao, Mandava Venkata Basaveswara; Subbarao, Mannam published the artcile< Design, synthesis, anti-cancer evaluation and binding mode studies of benzimidazole/benzoxazole linked β-carboline derivatives>, Formula: C8H12N2O2, the main research area is benzazolylthiazolyl carboline preparation antitumor SAR docking.

A new series of benzimidazole/benzoxazole linked β-carbolines I [X = N, O; R = H, 5,6-di-Me, 5,6-di-Br, etc.] were rationally designed and synthesized by combining two different anti-cancer fragments. The new hybrid β-carbolines I were subjected to anti-cancer screening against four different human cancer cell lines such as MCF-7 (breast), A549 (lung), Colo-205 (colon) and A2780 (ovarian) by using standard MTT assay. These hybrid β-carbolines I exhibited significant and high fold anti-cancer activity against MCF-7 cell lines than reference standard They were proved to be effective against A549 and Colo-205 cell lines. Further, compound I [X = N, R = 5,6-di-MeO, 5,6-di-Me; X = O, R = 5,6-di-Me] exhibited maximum anti-cancer activity among these hybrid β-carbolines. Later, all of the hybrid β-carbolines I were subjected to mol. interaction anal. against a few selected kinase targets such as cdc-like kinase (CLK-1 to CLK-4), epidermal growth factor reductase (EGFR) kinase, protein (ATR) kinase along with APC-Asef interface. The violin plot of binding energies of compounds I suggested them as good kinase binders. Result interpretation reported that hybrid β-carbolines I as promising CLK binders. The anti-cancer data of new hybrid β-carbolines I against MCF-7 cell lines were agreement with parent β-carboline skeleton.

Journal of Molecular Structure published new progress about Amino phenols Role: RCT (Reactant), RACT (Reactant or Reagent). 27841-33-4 belongs to class chlorides-buliding-blocks, and the molecular formula is C8H12N2O2, Formula: C8H12N2O2.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Kuehl, Valerie A.; Duong, Phuoc H. H.; Sadrieva, Deana; Amin, Samrat A.; She, Yuqi; Li-Oakey, Katie D.; Yarger, Jeffery L.; Parkinson, Bruce A.; Hoberg, John O. published the artcile< Synthesis, Postsynthetic Modifications, and Applications of the First Quinoxaline-Based Covalent Organic Framework>, Recommanded Product: 4,5-Dimethoxybenzene-1,2-diamine, the main research area is postsynthetic first quinoxaline covalent organic framework; COF; covalent organic framework; membrane filtration; modifiable materials; nanoporous; quinoxaline.

We report a new synthetic protocol for preparing highly ordered two-dimensional nanoporous covalent organic frameworks (2D-COFs) based on a quinoxaline backbone. The quinoxaline framework represents a new type of COF that enables postsynthetic modification by placing two different chem. functionalities within the nanopores including layer-to-layer crosslinking. We also demonstrate that membranes fabricated using this new 2D-COF perform highly selective separations resulting in dramatic performance enhancement post crosslinking.

ACS Applied Materials & Interfaces published new progress about Covalent organic frameworks. 27841-33-4 belongs to class chlorides-buliding-blocks, and the molecular formula is C8H12N2O2, Recommanded Product: 4,5-Dimethoxybenzene-1,2-diamine.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Feng, Zihao; Wu, Canmin; Liao, Wei-Ming; Chung, Lai-Hon; He, Jun published the artcile< Construction and investigation of chiral and photoluminescent Metal-Organic framework based on Zn(II) ions and achiral methoxy-functionalized benzimidazolate linkers>, Synthetic Route of 27841-33-4, the main research area is dimethoxy benzimidazolate zinc metal organic framework preparation crystal structure; chiral photoluminescent dimethoxy benzimidazolate zinc MOF preparation crystal structure.

A Zn(II)-based metal-organic framework, namely MeOBim-Zn (1), has been prepared by the reaction between 5,6-dimethoxy-1H-benzo[d]imidazole (MeOBimH) and Zn(NO3)2 in the presence of aqueous ammonia through solvothermal method and characterized by single-crystal x-ray diffraction, TGA and FT-IR. 1 Exhibits a (10,3)-a chiral network constructing from achiral MeOBim- linker and Zn(II) ions via spontaneous resolution In addition, 1 shows photoluminescent emission at 433 nm upon photoexcitation at 365 nm and this emission may originate from dissipation of metal-perturbed π(MeOBim-) to π*(MeOBim-) intraligand (IL) excited state.

Inorganic Chemistry Communications published new progress about Crystal structure. 27841-33-4 belongs to class chlorides-buliding-blocks, and the molecular formula is C8H12N2O2, Synthetic Route of 27841-33-4.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Li, Lingling; Xiong, Zhi; Dang, Yijing; Li, Yang; Zhang, Ao; Ding, Chunyong; Xu, Zhiai; Zhang, Wen published the artcile< A red-emissive D-A-D type fluorescent probe for lysosomal pH imaging>, Product Details of C8H12N2O2, the main research area is red emissive type fluorescent probe lysosome pH.

Visual detection of pH changes in lysosomes is critical because lysosomes not only play an important role in diverse cellular functions but also are closely related to various physiol. and pathol. processes. Herein, we disclose a donor-acceptor-donor (D-A-D) type fluorescent probe DBTD for detecting pH fluctuation in lysosomes. DBTD was rationally designed by using benzothiadiazole as the electron acceptor and N,N-diethylamino groups as the electron donor. Owing to its unique D-A-D structure, DBTD displayed a red-emission centered at 614 nm. It showed a sensitive and a linear response to pH from 4.5 to 5.2 with a pKa of 5.0, which is very suitable for lysosomal pH imaging. The response was based on the intramol. charge transfer (ICT) effect owing to the protonation of the diethylamino group. Furthermore, DBTD could accurately monitor lysosomal pH variations in SGC-7901 cells. More importantly, it was able to image the pH change in lysosomes during the autophagy process successfully, suggesting the great potential of DBTD acting as a powerful tool for monitoring lysosomal pH-related biol. processes.

Analytical Methods published new progress about Autophagy. 27841-33-4 belongs to class chlorides-buliding-blocks, and the molecular formula is C8H12N2O2, Product Details of C8H12N2O2.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Das, Agnideep; Schleinitz, Jules; Karmazin, Lydia; Vincent, Bruno; Le Breton, Nolwenn; Rogez, Guillaume; Guenet, Aurelie; Choua, Sylvie; Grimaud, Laurence; Desage-El Murr, Marine published the artcile< A Single Bioinspired Hexameric Nickel Catechol-Alloxazine Catalyst Combines Metal and Radical Mechanisms for Alkene Hydrosilylation>, HPLC of Formula: 27841-33-4, the main research area is hexameric nickel catechol alloxazine complex preparation hydrosilylation alkene catalyst; crystal structure mol hexameric nickel catechol alloxazine complex preparation; radical mechanism alkene hydrosilylation hexanickel catechol alloxazine catalyst safety; alloxazine; chain walking; nickel catalysis; radical chemistry; redox-active ligands.

Mechanisms combining organic radicals and metallic intermediates hold strong potential in homogeneous catalysis. Such activation modes require careful optimization of two interconnected processes: one for the generation of radicals and one for their productive integration towards the final product. We report that a bioinspired polymetallic nickel complex can combine ligand- and metal-centered reactivities to perform fast hydrosilylation of alkenes under mild conditions through an unusual dual radical- and metal-based mechanism. This earth-abundant polymetallic complex incorporating a catechol-alloxazine motif as redox-active ligand operates at low catalyst loading (0.25 mol%) and generates silyl radicals and a nickel-hydride intermediate through a hydrogen atom transfer (HAT) step. Evidence of an isomerization sequence enabling terminal hydrosilylation of internal alkenes points towards the involvement of the nickel-hydride species in chain walking. This single catalyst promotes a hybrid pathway by combining synergistically ligand and metal participation in both inner- and outer- sphere processes.

Chemistry – A European Journal published new progress about Alkenes Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 27841-33-4 belongs to class chlorides-buliding-blocks, and the molecular formula is C8H12N2O2, HPLC of Formula: 27841-33-4.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Chou, Teh-Chang; Cheng, Ju-Fang; Gholap, Atul R.; Huang, Jim Jing-Kai; Chen, Jyun-Chang; Huang, Jing-Kai; Tseng, Jui-Chang published the artcile< Aromatization-driven Grob-fragmentation approach toward polyazaacenes. Synthesis and amination of multi-functionalized diazapentacenes>, Synthetic Route of 27841-33-4, the main research area is dichloro dimethoxy tetrahydro methanoanthracene preparation Grob fragmentation; methoxycarbonyl chloro diazapentacene regioselective preparation amine amination; amino methoxycarbonyl diazapentacene preparation.

A general approach toward the synthesis of multi-functionalized diazapentacene derivatives I [R1 = R4 = H, nitro; R2 = R3 = H, MeO, nitro; R2R3 = 15-crown-5-ether, 18-crown-6-ether] using 1,2,3,4-tetrachloro-5,5-dimethoxycyclopentadiene (TDCp), a substituted benzene-1,2-diamine (ADA), and a naphthalene-1,4-dione (BQ) as the building units, was described. The synthesis basically entails three operations: (i) oxidation of the dichloroetheno-bridge in the Diels-Alder cycloadduct of TDCp and 1,4-naphthaquinone, (ii) condensation of the 1,2-diketone thus generated with an ADA to give quinoxaline-fused polycyclic compounds, followed by (iii) an one-pot, three-reaction process keyed upon the base- or acid-catalyzed aromatization-driven Grob-type fragmentation to produce compounds I. The compound I [R1 = R2 = R3 = R4 = H] underwent the nucleophilic aromatic ipso-amination with primary and secondary amines to afford the amino-substituted derivatives II [R5 = n-Bu, cyclohexyl, Ph, etc.], which tend to self-assemble in solid state driven by the cofacial π-stacking interactions, demonstrated by the crystal packing structures of compounds II [R5 = n-Bu, N1-(anthracen-9-ylmethyl)propane-1,3-diamino].

Tetrahedron published new progress about Amination. 27841-33-4 belongs to class chlorides-buliding-blocks, and the molecular formula is C8H12N2O2, Synthetic Route of 27841-33-4.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Wu, Tong; Rajabimoghadam, Khashayar; Puri, Ankita; Hebert, David D.; Qiu, Yi Lin; Eichelberger, Sidney; Siegler, Maxime A.; Swart, Marcel; Hendrich, Michael P.; Garcia-Bosch, Isaac published the artcile< A 4H+/4e- Electron-Coupled-Proton Buffer Based on a Mononuclear Cu Complex>, Application of C8H12N2O2, the main research area is copper dimethoxyphenylenebistertbutylurea complex preparation redox potential frontier mol orbital; crystal structure copper dimethoxyphenylenebistertbutylurea complex.

In this research article, we describe a 4H+/4e- electron-coupled-proton buffer (ECPB) based on Cu and a redox-active ligand. The protonated/reduced ECPB (complex 1: [Cu(8H+/14e-)]1+), consisting of CuI with 2 equiv of the ligand (LH4: 1,1′-(4,5-dimethoxy-1,2-phenylene)bis(3-(tert-butyl)urea)), reacted with H+/e- acceptors such as O2 to generate the deprotonated/oxidized ECPB. The resulting compound, (complex 5: [Cu(4H+/10e-)]1+), was characterized by X-ray diffraction anal., NMR (1H-NMR), and d. functional theory, and it is electronically described as a cuprous bis(benzoquinonediimine) species. The stoichiometric 4H+/4e- reduction of 5 was carried out with H+/e- donors to generate 1 (CuI and 2 equiv of LH4) and the corresponding oxidation products. The 1/5 ECPB system catalyzed the 4H+/4e- reduction of O2 to H2O and the dehydrogenation of organic substrates in a decoupled (oxidations and reductions are separated in time and space) and a coupled fashion (oxidations and reductions coincide in time and space). Mechanistic anal. revealed that upon reductive protonation of 5 and oxidative deprotonation of 1, fast disproportionation reactions regenerate complexes 5 and 1 in a stoichiometric fashion to maintain the ECPB equilibrium

Journal of the American Chemical Society published new progress about Crystal structure. 27841-33-4 belongs to class chlorides-buliding-blocks, and the molecular formula is C8H12N2O2, Application of C8H12N2O2.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics

Hu, Ming-Hao; Lin, Jia-Hong published the artcile< New Dibenzoquinoxalines Inhibit Triple-Negative Breast Cancer Growth by Dual Targeting of Topoisomerase 1 and the c-MYC G-Quadruplex>, SDS of cas: 27841-33-4, the main research area is dibenzoquinoxaline preparation breast cancer topoisomerase 1 MYC quadruplex inhibitor.

As c-MYC is one of the central players in triple-neg. breast cancer (TNBC) oncogenesis, inhibiting c-MYC expression would be an effective anticancer strategy. Transcription-induced neg. supercoiling is crucial in the regulation of c-MYC transcription, which facilitates the formation of a G4 structure in NHE III1 that can silence the transcription. However, topoisomerase 1 (Topo1) can dissipate this neg. supercoiling, leading to continuous activation of c-MYC transcription. Thus, dual ligands targeting both Topo1 and c-MYC G4 appear to be significant in cancer therapy. In this study, a series of new dibenzoquinoxaline derivatives were designed, synthesized, and evaluated for both Topo1 and c-MYC inhibition. Among them, 11-Methoxy-3,6-bis(4-methylpiperazin-1-yl)dibenzo[a,c]-phenazine was identified as the most promising dual ligand, which could effectively inhibit Topo1 activity and strongly stabilize c-MYC G4, thereby inhibiting cancer cell growth. Accordingly, this work suggests that this dual-targeting strategy may be effective in cancer therapy.

Journal of Medicinal Chemistry published new progress about Animal gene, c-myc Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 27841-33-4 belongs to class chlorides-buliding-blocks, and the molecular formula is C8H12N2O2, SDS of cas: 27841-33-4.

Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics