Month: October 2022

Luo, Kai; Chen, Yao-Zhong; Chen, Li-Xian; Wu, Lei published the artcile< Autoxidative C(sp2)-P Formation: Direct Phosphorylation of Heteroarenes under Oxygen, Metal-Free, and Solvent-Free Conditions>, Synthetic Route of 20582-55-2, the main research area is phosphorylation heteroarene arylphosphine oxide; heteroaryl phosphine oxide preparation.

The authors reveal here a direct autoxidative phosphorylation of heteroarenes induced by O under metal-free and solvent-free conditions. This new methodol. provides an economical, operationally simple, and environmentally friendly approach toward (Het)C(sp2)-P formation with medium to excellent yields. Heteroarenes including thiazole and quinoxaline derivatives are applicable under standard conditions, which is testified via a radical mechanism.

Journal of Organic Chemistry published new progress about Aromatic hydrocarbons Role: RCT (Reactant), RACT (Reactant or Reagent) (heteroarenes). 20582-55-2 belongs to class thiazole, and the molecular formula is C7H9NO2S, Synthetic Route of 20582-55-2.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Moreira, A. C.; Amaral, D. T.; Gabriel, G. V. M.; Viviani, V. R. published the artcile< Cloning and molecular properties of a novel luciferase from the Brazilian Bicellonycha lividipennis (Lampyridae: Photurinae) firefly: comparison with other firefly luciferases>, Product Details of C11H8N2O3S2, the main research area is Bicellonycha Photuris Luciola cloning mol properties luciferase cDNA; Bicellonycha lividipennis; Firefly luciferase; Luciferase; Metal sensitive luciferase; pH-sensitive luciferase.

Several firefly luciferases eliciting light emission in the yellow-green range of the spectrum and with distinct kinetic properties have been already cloned, sequenced, and characterized. Some of them are currently being applied as anal. reagents and reporter genes for bioimaging and biosensors, and more recently as potential color tuning indicators of intracellular pH and toxic metals. They were cloned from the subfamilies Lampyrinae (Photinini: Photinus pyralis, Macrolampissp2; Cratomorphini: Cratomorphus distinctus), Photurinae (Photuris pennsylvanica), Luciolinae (Luciola cruciata, L. lateralis, L. mingrelica, L. italica, Hotaria parvula), and Amydetinae (Amydetes vivianii) occurring in different parts of the world. The largest number has been cloned from fireflies occurring in Brazilian biomes. Taking advantage of the large biodiversity of fireflies occurring in the Brazilian Atlantic rainforest, here we report the cloning and characterization of a novel luciferase cDNA from the Photurinae subfamily, Bicellonycha lividipennis, which is a very common firefly in marshlands in Brazil. As expected, multialignements and phylogenetic anal. show that this luciferase clusters with Photuris pennsylvanica adult isoenzyme, and with other adult lantern firefly luciferases, in reasonable agreement with traditional phylogenetic anal. The luciferase elicits light emission in the yellow-green region, has kinetics properties similar to other adult lantern firefly luciferases, including pH- and metal sensitivities, but displays a lower sensitivity to nickel, which is suggested to be caused by the natural substitution of H310Y. Graphical abstract: [graphic not available: see fulltext].

Photochemical & Photobiological Sciences published new progress about Amino acids Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 2591-17-5 belongs to class thiazole, and the molecular formula is C11H8N2O3S2, Product Details of C11H8N2O3S2.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Bilchak, Connor R.; Jhalaria, Mayank; Adhikari, Sabin; Midya, Jiarul; Huang, Yucheng; Abbas, Zaid; Nikoubashman, Arash; Benicewicz, Brian C.; Rubinstein, Michael; Kumar, Sanat K. published the artcile< Understanding Gas Transport in Polymer-Grafted Nanoparticle Assemblies>, Formula: C3H5NS2, the main research area is gas transport polymer grafted nanoparticle.

We rationalize the unusual gas transport behavior of polymer-grafted nanoparticle (GNP) membranes. While gas permeabilities depend specifically on the chem. of the polymers considered, we focus here on permeabilities relative to the corresponding pure polymer, which show interesting, “”universal”” behavior. For a given NP radius, Rc, and for large enough areal grafting densities, σ, to be in the dense brush regime, we find that gas permeability enhancements display a maximum as a function of the graft chain mol. weight, Mn. Based on a recently proposed theory for the structure of a spherical brush in a melt of GNPs, we conjecture that this peak permeability occurs when the densely grafted polymer brush has the highest, packing-induced extension free energy per chain. The corresponding brush thickness is predicted to be hmax = sqr3Rc, independent of chain chem. and σ, i.e., at an apparently universal value of the NP volume fraction (or loading), ϕNP, ϕNP,max = [Rc/(Rc + hmax)]3 ≈ 0.049. Motivated by this conclusion, we measured CO2 and CH4 permeability enhancements across a variety of Rc, Mn, and σ and find that they behave in a similar manner when considered as a function of ϕNP, with a peak in the near vicinity of the predicted ϕNP,max. Thus, the chain length-dependent extension free energy appears to be the critical variable in determining the gas permeability for these hybrid materials. The emerging picture is that these curved polymer brushes, at high enough σ, behave akin to a two-layer transport medium-the region in the near vicinity of the NP surface is comprised of extended polymer chains that speed up gas transport relative to the unperturbed melt. The chain extension free energy increases with increasing chain length, up to a maximum, and apparently leads to an increasing gas permeability. For long enough grafts, there is an outer region of chain segments that is akin to an unperturbed melt with slow gas transport. The permeability maximum and decreasing permeability with increasing chain length then follow naturally.

Macromolecules (Washington, DC, United States) published new progress about Annealing. 96-53-7 belongs to class thiazole, and the molecular formula is C3H5NS2, Formula: C3H5NS2.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Pietkiewicz, Adrian L.; Zhang, Yuqi; Rahimi, Marwa N.; Stramandinoli, Michael; Teusner, Matthew; McAlpine, Shelli R. published the artcile< RITA Mimics: Synthesis and Mechanistic Evaluation of Asymmetric Linked Trithiazoles>, Related Products of 96929-05-4, the main research area is RITA mimic trithiazole preparation antitumor colorectal p53 cMyc Mcl1; Heterocycle; Mcl-1; RITA; antitumor; c-Myc; p53; thiazole.

The established cytotoxic agent RITA contains a thiophene-furan-thiophene backbone and two terminal alc. groups. Herein the authors investigate the effect of using thiazoles as the backbone in RITA-like mols. and modifying the terminal groups of these trithiazoles, thereby generating 41 unique structures. Incorporating side chains with varied steric bulk allowed the authors to investigate how size and a stereocenter impacted biol. activity. Subjecting compounds to growth inhibition assays on HCT-116 cells showed that the most potent compounds 7d (BocHN-D-Val-Thiazole-Thiazole-Thiazole-OEt), 7e (BocHN-L-Val-Thiazole-Thiazole-Thiazole-OEt), and 7h (BocHN-CHA-thiazole-thiazole-thiazole-OEt) had GIC50 values of 4.4, 4.4, and 3.4 μM, resp., vs. RITA (GIC50 of 800 nM). Anal. of these compounds in apoptosis assays proved that 7d, 7e, and 7h were as effective as RITA at inducing apoptosis. Evaluating the impact of 7h on proteins targeted by RITA (p53, c-Myc, and Mcl-1) indicated that it acts via a different mechanism of action to that of RITA. RITA suppressed Mcl-1 protein via p53, whereas compound 7h suppressed Mcl-1 expression via an alternative mechanism independent of p53.

ACS Medicinal Chemistry Letters published new progress about Antiproliferative agents. 96929-05-4 belongs to class thiazole, and the molecular formula is C12H18N2O4S, Related Products of 96929-05-4.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Medina, Jose M.; Kang, Taeho; Erbay, Tugce G.; Shao, Huiling; Gallego, Gary M.; Yang, Shouliang; Tran-Dube, Michelle; Richardson, Paul F.; Derosa, Joseph; Helsel, Ryan T.; Patman, Ryan L.; Wang, Fen; Ashcroft, Christopher P.; Braganza, John F.; McAlpine, Indrawan; Liu, Peng; Engle, Keary M. published the artcile< Cu-Catalyzed Hydroboration of Benzylidenecyclopropanes: Reaction Optimization, (Hetero)Aryl Scope, and Origins of Pathway Selectivity>, Application of C4H3NOS, the main research area is benzylidenecyclopropane preparation copper catalyzed hydroboration diborane; cyclopropylboronic ester preparation reactivity; potential energy surface copper catalyzed hydroboration benzylidenecyclopropane; Copper catalysis; benzylidenecyclopropanes; cyclopropylboronic esters; heterocycles; hydroborations; β-carbon elimination.

The Cu-catalyzed hydroboration of benzylidenecyclopropanes, conveniently accessed in one step from readily available benzaldehydes, is reported. Under otherwise identical reaction conditions, two distinct phosphine ligands grant access to different products by either suppressing or promoting the cyclopropane opening via β-C elimination. Computational studies provide insight into how the rigidity and steric environment of these different bis-phosphine ligands influence the relative activation energies of β-C elimination vs. protodecupration from the key benzylcopper intermediate. The method tolerates a wide variety of heterocycles prevalent in clin. and preclin. drug development, giving access to valuable synthetic intermediates. The versatility of the tertiary cyclopropylboronic ester products is demonstrated through several derivatization reactions.

ACS Catalysis published new progress about Alkenes Role: PEP (Physical, Engineering or Chemical Process), PRP (Properties), RCT (Reactant), SPN (Synthetic Preparation), PROC (Process), RACT (Reactant or Reagent), PREP (Preparation) (benzylidenecyclopropanes). 1003-32-3 belongs to class thiazole, and the molecular formula is C4H3NOS, Application of C4H3NOS.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Shin, Chung-gi; Okumura, Kazuo; Ito, Akio; Nakamura, Yutaka published the artcile< Synthesis of a common main skeleton of thiostrepton peptide antibiotics, A 10255G and J>, Safety of Ethyl 2-(((tert-butoxycarbonyl)amino)methyl)thiazole-4-carboxylate, the main research area is thiostrepton peptide antibiotic A 10255G; peptide thiostrepton antibiotic A 10255J.

The synthesis of protected, common main skeleton I (boc = Me3CO2C) of thiostrepton peptides, A10255G and J, containing a few kinds of unusual amino acids is described.

Chemistry Letters published new progress about 96929-05-4. 96929-05-4 belongs to class thiazole, and the molecular formula is C12H18N2O4S, Safety of Ethyl 2-(((tert-butoxycarbonyl)amino)methyl)thiazole-4-carboxylate.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Yin, Zhiping; Zhang, Zhuan; Soule, Jean-Francois; Dixneuf, Pierre H.; Wu, Xiao-Feng published the artcile< Iron-catalyzed carbonylative alkyl-acylation of heteroarenes>, Quality Control of 1003-32-3, the main research area is alkyl heteroaryl ketone preparation chemoselective; heteroarene carbon monoxide carbonylative alkyl acylation iron triflate.

Herein, an efficient carbonylative protocol for the introduction of an alkyl-acyl group into heteroarenes from cyclobutanone oximes is presented. In the presence of Fe(OTf)2 catalyst, proceeds via intermol. alkyl-acylation of different heteroarenes. A broad range of alkyl heteroaryl ketones are synthesized with excellent functional group tolerance with good chemoselectivity.

Journal of Catalysis published new progress about Acylation (alkyl-). 1003-32-3 belongs to class thiazole, and the molecular formula is C4H3NOS, Quality Control of 1003-32-3.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Zhou, Yibo; Yin, Keyi; Dong, Hao; Yang, Sheng; Li, JunBin; Luo, Jinqiu; Li, Yi; Yang, Ronghua published the artcile< Long-Lasting Bioluminescence Imaging of the Fibroblast Activation Protein by an Amphiphilic Block Copolymer-Based Probe>, Electric Literature of 2591-17-5, the main research area is bioluminescence imaging fibroblast activation protein amphiphilic block copolymer probe.

Long-term specific tracing of the fibroblast activation protein (FAP) has been of great importance because it is heavily expressed by stromal fibroblasts of multiple diseases, and several disorders associated with FAP are chronical. Bioluminescence (BL) imaging has its advantages to detect FAP in vivo since no external excitation is required, but the current FAP-responsive BL probe was constructed by covalently masking the firefly luciferase substrate and easily secreted out from the animal, resulting in transient BL imaging of FAP. To circumvent this problem, a peptide-linked amphiphilic block copolymer-based probe (PABC) was developed and applied to the long-lasting BL image of FAP in vivo. For this purpose, an amphiphilic block copolymer containing an FAP-responsive peptide was fabricated to self-assemble into micelles, which act as a depot to load amounts of D-luciferin for constructing the BL probe. Upon reaction with FAP, the micelle would be destroyed to release the internal D-luciferin for BL emission by a luciferase-catalyzed reaction. By virtue of the high loading capability of micelles, the FAP was determined from 0.5 to 10 ng/mL with a detection limit of 0.105 ng/mL, and the high sensitivity makes the PABC capable of distinguishing cancer cells from normal ones. Importantly, compared with free D-luciferin, PABC can be used to persistently image the FAP in living cells and in vivo. This characteristic of long-lasting specific tracing of the FAP makes us envision that this BL probe could be used for screening of FAP inhibitors and diagnosing various FAP-related diseases in future.

Analytical Chemistry (Washington, DC, United States) published new progress about Amphiphiles. 2591-17-5 belongs to class thiazole, and the molecular formula is C11H8N2O3S2, Electric Literature of 2591-17-5.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

Tao, Zhi-Fu; Wang, Le; Stewart, Kent D.; Chen, Zehan; Gu, Wendy; Bui, Mai-Ha; Merta, Philip; Zhang, Haiying; Kovar, Peter; Johnson, Eric; Park, Chang; Judge, Russell; Rosenberg, Saul; Sowin, Thomas; Lin, Nan-Horng published the artcile< Structure-based design, synthesis, and biological evaluation of potent and selective macrocyclic checkpoint kinase 1 inhibitors>, COA of Formula: C4H3NOS, the main research area is macrocyclic diarylurea preparation checkpoint kinase inhibitor.

Based on the crystallog. anal. of a urea-checkpoint kinase 1 (Chk1) complex and mol. modeling, a class of macrocyclic Chk1 inhibitors were designed and their biol. activities were evaluated. An efficient synthetic methodol. for macrocyclic ureas was developed with Grubbs metathesis macrocyclization as the key step. The structure-activity relationship studies demonstrated that the macrocyclization retains full Chk1 inhibition activity and that the 4-position of the Ph ring can tolerate a wide variety of substituents. These Chk1 inhibitors exhibited excellent selectivity over a panel of more than 70 kinases. Some compounds, e.g., I, were identified as ideal Chk1 inhibitors, which showed little or no single-agent activity but significantly potentiate the cytotoxicities of the DNA-damaging antitumor agents doxorubicin and camptothecin. These Chk1 inhibitors abrogate the doxorubicin-induced G2 and camptothecin-induced S checkpoint arrests, confirming that their potent biol. activities are mechanism-based through Chk1 inhibition.

Journal of Medicinal Chemistry published new progress about Aldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 1003-32-3 belongs to class thiazole, and the molecular formula is C4H3NOS, COA of Formula: C4H3NOS.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica

da Silva, Monize M.; Ribeiro, Gabriel H.; de Camargo, Mariana S.; Ferreira, Antonio G.; Ribeiro, Leandro; Barbosa, Marilia I. F.; Deflon, Victor M.; Castelli, Silvia; Desideri, Alessandro; Correa, Rodrigo S.; Ribeiro, Arthur B.; Nicolella, Heloiza D.; Ozelin, Saulo D.; Tavares, Denise C.; Batista, Alzir A. published the artcile< Ruthenium(II) Diphosphine Complexes with Mercapto Ligands That Inhibit Topoisomerase IB and Suppress Tumor Growth In Vivo>, HPLC of Formula: 96-53-7, the main research area is melanoma antitumor lung breast cancer hTopIB docking ruthenium complexes.

Ruthenium(II) complexes (Ru1-Ru5), with the general formula [Ru(N-S)(dppe)2]PF6, bearing two 1,2-bis(diphenylphosphino)ethane (dppe) ligands and a series of mercapto ligands (N-S), have been developed. The combination of these ligands in the complexes endowed hydrophobic species with high cytotoxic activity against five cancer cell lines. For the A549 (lung) and MDA-MB-231 (breast) cancer cell lines, the IC50 values of the complexes were 288- to 14-fold lower when compared to cisplatin. Furthermore, the complexes were selective for the A549 and MDA-MB-231 cancer cell lines compared to the MRC-5 nontumor cell line. The multitarget character of the complexes was investigated by using calf thymus DNA (CT DNA), human serum albumin, and human topoisomerase IB (hTopIB). The complexes potently inhibited hTopIB. In particular, complex [Ru(dmp)(dppe)2]PF6 (Ru3) (I), bearing the 4,6-diamino-2-mercaptopyrimidine (dmp) ligand, effectively inhibited hTopIB by acting on both the cleavage and religation steps of the catalytic cycle of this enzyme. Mol. docking showed that the Ru1-Ru5 complexes have binding affinity by active sites on the hTopI and hTopI-DNA, mainly via π-alkyl and alkyl hydrophobic interactions, as well as through hydrogen bonds. Complex Ru3 displayed significant antitumor activity against murine melanoma in mouse xenograph models, but this complex did not damage DNA, as revealed by Ames and micronucleus tests.

Inorganic Chemistry published new progress about Antitumor agents. 96-53-7 belongs to class thiazole, and the molecular formula is C3H5NS2, HPLC of Formula: 96-53-7.

Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica