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Search results for: Benzyl 2-Acetamido-2-deoxy-6-O-(β-D-galactopyranosyl) -α-D-galactopyranoside C21H31NO11 CAS: 93496-44-7

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#38419383   2024/02/28 To Up

2D Graphene Oxide Membrane Nanoreactors for Rapid Directional Flow Ring-Opening Reactions with Dominant Same-Configuration Products.

Nanoconfinement within enzymes can increase reaction rate and improve selectivity under mild conditions. However, it remains a great challenge to achieve chemical reactions imitating enzymes with directional molecular motion, short reaction time, ≈100% conversion, and chiral conversion in artificial nanoconfined systems. Here, directional flow ring-opening reactions of styrene oxide and alcohols are demonstrated with ≈100% conversion in <120 s at 22 °C using graphene oxide membrane nanoreactors. Dominant products have the same configuration as chiral styrene oxide in confined reactions, which is dramatically opposed to bulk reactions. The unique chiral conversion mechanism is caused by spatial confinement, limiting the inversion of benzylic chiral carbon. Moreover, the enantiomeric excess of same-configuration products increased with higher alkyl charge in confined reactions. This work provides a new route to achieve rapid flow ring-opening reactions with specific chiral conversion within 2D nanoconfined channels, and insights into the impact of nanoconfinement on ring-opening reaction mechanisms.
Jiangwei Fu, Shuai Pang, Yuhui Zhang, Xiang Li, Bo Song, Daoling Peng, Xiqi Zhang, Lei Jiang

2987 related Products with: 2D Graphene Oxide Membrane Nanoreactors for Rapid Directional Flow Ring-Opening Reactions with Dominant Same-Configuration Products.

1 kit1 kit1 kit 96 Tests 10 mg100ug Lyophilized100ug Lyophilized10020 Reactions50 ml100 reactions100ug Lyophilized

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#38373587   2024/02/17 To Up

RIFM fragrance ingredient safety assessment, isoeugenyl benzyl ether, CAS Registry Number 120-11-6.


A M Api, A Bartlett, D Belsito, D Botelho, M Bruze, A Bryant-Freidrich, G A Burton, M A Cancellieri, H Chon, M L Dagli, W Dekant, C Deodhar, K Farrell, A D Fryer, L Jones, K Joshi, A Lapczynski, M Lavelle, I Lee, H Moustakas, J Muldoon, T M Penning, G Ritacco, N Sadekar, I Schember, T W Schultz, F Siddiqi, I G Sipes, G Sullivan, Y Thakkar, Y Tokura

2540 related Products with: RIFM fragrance ingredient safety assessment, isoeugenyl benzyl ether, CAS Registry Number 120-11-6.

5 G 100 G 5 G 5 MG 25 G 1 G 1KG 1 G 5 G 25 G 5 G 5 G

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#38359754   2024/02/07 To Up

1,3-Disubstituted-1,2,4-triazin-6-ones with potent activity against androgen receptor-dependent prostate cancer cells.

Synthesis and biological evaluation of a small, focused library of 1,3-disubstituted-1,2,4-triazin-6-ones for in vitro inhibitory activity against androgen-receptor-dependent (22Rv1) and androgen-receptor independent (PC3) castration-resistant prostate cancer (CRPC) cells led to highly active compounds with in vitro IC values against 22Rv1 cells of <200 nM, and with apparent selectivity for this cell type over PC3 cells. From metabolic/PK evaluations of these compounds, a 3-benzyl-1-(2,4-dichlorobenzyl) derivative had superior properties and showed considerably stronger activity, by nearly an order of magnitude, against AR-dependent LNCaP and C4-2B cells compared to AR-independent DU145 cells. This lead compound decreased AR expression in a dose and time dependent manner and displayed promising therapeutic effects in a 22Rv1 CRPC xenograft mouse model. Computational target prediction and subsequent docking studies suggested three potential known prostate cancer targets: p38a MAPK, TGF-β1, and HGFR/c-Met, with the latter case of c-Met appearing stronger, owing to close structural similarity of the lead compound to known pyridazin-3-one derivatives with potent c-Met inhibitory activity. RNA-seq analysis showed dramatic reduction of AR signalling pathway and/or target genes by the lead compound, subsequently confirmed by quantitative PCR analysis. The lead compound was highly inhibitory against HGF, the c-Met ligand, which fitted well with the computational target prediction and docking studies. These results suggest that this compound could be a promising starting point for the development of an effective therapy for the treatment of CRPC.
Shiting Zhao, Abdelsalam S Ali, Xiaomin Liu, Zhiwei Yu, Xinyu Kong, Yan Zhang, G Paul Savage, Yong Xu, Bin Lin, Donghai Wu, Craig L Francis

1138 related Products with: 1,3-Disubstituted-1,2,4-triazin-6-ones with potent activity against androgen receptor-dependent prostate cancer cells.

96T1.00 flask100ug100ug100.00 ul200ug100ul100ug

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#38228780   2024/01/16 To Up

Semi-synthesis and structure-activity relationship study yield antibacterial vicenistatin derivatives with low cytotoxicity.

Vicenistatin (1) is a 20-membered polyketide macrocyclic antibiotic with potent antimicrobial and cytotoxic activities. In this study, to further explore the potential of 1 as candidates of antibacterial drug development, 4'-N-demethyl vicenistatin (2), a secondary metabolite obtained from the ∆vicG mutant strain of Monodonata labio-associated Streptomyces parvus SCSIO Mla-L010, was utilized as a starting material for modifications of 4'-amino group of vicenistatin. Six new vicenistatin derivatives (3-8) were semi-synthesized through a concise route of amino modification with various aliphatic and aromatic aldehydes. Our study reveals that the bioactivity of vicenistatin is closely related to amino modification in sugar moiety, which results from the length of alkyl side chain as well as the presence of electron withdrawing/denoting group on the benzene ring. Importantly, compounds 4 with a butyl group and 8 with a 3,5-dihydroxyl-benzyl group at 4'-amino group, respectively, exhibited good antimicrobial activities, with MIC values spanning 0.5-4 μg ml to Gram-positive pathogens, including methicillin-resistant Staphylococcus aureus, methicillin-resistant Staphylococcus epidermidis, Micrococcus luteus and Bacillus subtilis, with low cytotoxicity. This research promotes the further exploration of structure-activity relationships of vicenistatin and provides new vicenistatin derivatives for development of future anti-infectious agents with reduced cytotoxicity.
Jun Li, Zhenye Yang, Chuanling Shi, Xiaoyun Wu, Le Zhou, Yongqian Liang, Qinglian Li, Jianhua Ju

2808 related Products with: Semi-synthesis and structure-activity relationship study yield antibacterial vicenistatin derivatives with low cytotoxicity.

96 Tests 40 assays100tests100 mg1 kit100 assays2x96 well plates 25 MG100ug100ul

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#38126374   2024/01/17 To Up

Exploring the impact of alignment media on RDC analysis of phosphorus-containing compounds: a molecular docking approach.

Residual dipolar couplings (RDCs) are employed in NMR analysis when conventional methods, such as -couplings and nuclear Overhauser effects (NOEs) fail. Low-energy (optimized) conformers are often used as input structures in RDC analysis programs. However, these low-energy structures do not necessarily resemble conformations found in anisotropic environments due to interactions with the alignment medium, especially if the analyte molecules are flexible. Considering interactions with alignment media in RDC analysis, we developed and evaluated a molecular docking-based approach to generate more accurate conformer ensembles for compounds in the presence of the poly-γ-benzyl-L-glutamate alignment medium. We designed chiral phosphorus-containing compounds that enabled us to utilize P NMR parameters for the stereochemical analysis. Using P3D/PALES software to evaluate diastereomer discrimination, we found that our conformer ensembles outperform moderately the standard, low-energy conformers in RDC analysis. To further improve our results, we (i) averaged the experimental values of the molecular docking-based conformers by applying the Boltzmann distribution and (ii) optimized the structures through normal mode relaxation, thereby enhancing the Pearson correlation factor and even diastereomer discrimination in some cases. Nevertheless, we presume that significant differences between -couplings in isotropic and in anisotropic environments may preclude RDC measurements for flexible molecules. Therefore, generating conformer ensembles based on molecular docking enhances RDC analysis for mildly flexible systems while flexible molecules may require applying more advanced approaches, in particular approaches including dynamical effects.
Markéta Christou Tichotová, Lucie Tučková, Hugo Kocek, Aleš Růžička, Michal Straka, Eliška Procházková

2082 related Products with: Exploring the impact of alignment media on RDC analysis of phosphorus-containing compounds: a molecular docking approach.

1 module 120 ml 3 modules 100 UG1 module0.2 mg50 ug2 modules100.00 ul

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#38097085   2023/12/12 To Up

Insight into modified CeMn based catalysts for efficient degradation of toluene by in situ infrared.

Trace activated carbon (AC) and diatomaceous earth (DE) were used as structural promoters to be incorporated into Ce-Mn-based solid-solution catalysts by the redox precipitation method. The modified catalysts exhibit superior reducibility, with abundant Ce, Mnand reactive oxygen species, which are facilitated to the migration of oxygen and the generation of oxygen vacancies. In particular, the catalytic combustion temperatures of 90 % toluene (3000 ppm) on CeMnOx-AC/DE were 84 °C (dry) and 123 °C (10 vol% HO), respectively. The role of lattice oxygen and adsorbed oxygen was revealed by in situ DRIFTS. Additionally, in situ DRIFTS was employed to verify that the degradation of toluene by CeMnOx-AC/DE satisfied the Langmuir-Hinshelwood (L-H) mechanism and the Mars-Van Krevelen (MvK) mechanism. The possible reaction pathway was elucidated (toluene → benzyl alcohol → benzoic acid → maleic anhydride → CO + HO). Furthermore, final products attributed to toluene oxidation were detected by in situ DRIFTS at 50 °C in the absence of oxygen, confirming that the catalyst possessed outstanding performance at low temperatures beyond mere adsorption.
Xuelian Li, Rujie Chen, Min Yang, Yongfang Niu, Jing Li, Dan Shao, Xinmei Zheng, Chuanwei Zhang, Yanxing Qi

2630 related Products with: Insight into modified CeMn based catalysts for efficient degradation of toluene by in situ infrared.

1 kit 5 G1 mg1 kit500 MG1 mg250 mg 100 G1 mg 1 G

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#38039319   2023/12/01 To Up

Discovery of Insect Attractants Based on the Functional Analyses of Female-Biased Odorant Receptors and Their Orthologs in Two Closely Related Species.

Olfaction plays an instrumental role in host plant selection by phytophagous insects. and are two closely related moth species with different host plant ranges. In this study, we first comparatively analyzed the function of 11 female-biased odorant receptors (ORs) and their orthologs in the two species by the T1 neuron expression system and then examined the electroantennography responses of the two species to the most effective OR ligands. Behavioral assays using a Y-tube olfactometer indicate that guaiene, the primary ligand of HassOR21-2 and HarmOR21-2, only attracts the females, while benzyl acetone, the main ligand of HassOR35 and HarmOR35, attracts both sexes of the two species. Oviposition preference experiments further confirm that guaiene and benzyl acetone are potent oviposition attractants for the mated females of both species. These findings deepen our understanding of the olfactory coding mechanisms of host plant selection in herbivorous insects and provide valuable attractants for managing pest populations.
Bao-Tong Mo, Hao Guo, Guo-Cheng Li, Lin-Lin Cao, Xin-Lin Gong, Ling-Qiao Huang, Chen-Zhu Wang

1864 related Products with: Discovery of Insect Attractants Based on the Functional Analyses of Female-Biased Odorant Receptors and Their Orthologs in Two Closely Related Species.

2 Pieces/Box1x10e7 cells3 inhibitors1 mL15 inhibitors2 Pieces/Box 100ul

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#38012996   2023/11/25 To Up

Update to RIFM fragrance ingredient safety assessment, benzyl propionate, CAS Registry Number 122-63-4.


A M Api, D Belsito, D Botelho, M Bruze, G A Burton, M A Cancellieri, H Chon, M L Dagli, M Date, W Dekant, C Deodhar, A D Fryer, L Jones, K Joshi, M Kumar, A Lapczynski, M Lavelle, I Lee, D C Liebler, H Moustakas, M Na, T M Penning, G Ritacco, J Romine, N Sadekar, T W Schultz, D Selechnik, F Siddiqi, I G Sipes, G Sullivan, Y Thakkar, Y Tokura

1277 related Products with: Update to RIFM fragrance ingredient safety assessment, benzyl propionate, CAS Registry Number 122-63-4.

100 G 5 G 5 G 100 G 5 G 5 G 5 G 25 G 100 G 1 G500 mg

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#37965884   2023/11/15 To Up

Novel harmine derivatives as potent acetylcholinesterase and amyloid beta aggregation dual inhibitors for management of Alzheimer's disease.

In this study, a series of potential ligands for the treatment of AD were synthesised and characterised as novel harmine derivatives modified at position 9 with benzyl piperazinyl. In studies revealed that the majority of the derivatives exhibited moderate to potent inhibition against AChE and A aggregation. Notably, compounds and displayed potent drug - likeness and ADMET properties, demonstrating remarkable inhibitory activities towards AChE (IC = 58.76 nM and 89.38 nM, respectively) as well as A aggregation (IC = 9.31 M and 13.82 M, respectively). More importantly, compounds and showed exceptional neuroprotective effects against A-induced SH - SY5Y damage, while maintaining low toxicity in SH - SY5Y cells. Further exploration of the mechanism through kinetic studies and molecular modelling confirmed that compound could interact with both the CAS and the PAS of AChE. These findings suggested that harmine derivatives hold great potential as dual - targeted candidates for treating AD.
Hongtao Du, Jinzhi Song, Fang Ma, Hongxin Gao, Xinyan Zhao, Renjun Mao, Xiaolong He, Yan Yan

2239 related Products with: Novel harmine derivatives as potent acetylcholinesterase and amyloid beta aggregation dual inhibitors for management of Alzheimer's disease.

96 tests96 tests96 tests96 tests1,000 tests50ug100μg 100ul96 tests100 assays100tests100 plates

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