Month: December 2022

Yang, Xi published the artcileDihydropyrimidinone imidazoles as unique structural antibacterial agents for drug-resistant gram-negative pathogens, Recommanded Product: 3-Chlorobenzylchloride, the publication is European Journal of Medicinal Chemistry (2022), 114188, database is CAplus and MEDLINE.

The health crisis caused by severe multidrug resistance increasingly compels the exploitation of new alternative antibacterial drugs. A library of structurally unique dihydropyrimidinone imidazoles as novel potential antibacterial agents was developed with the aim to confront drug resistance. Some target compounds exhibited strong antibacterial activities, especially, sulfamethoxazole hybridized dihydropyrimidinone imidazole 8b was found to be extremely active against multidrug-resistant K. pneumonia and A. baumanii at a low concentration of 0.5 μg/mL, which outperformed norfloxacin even clinafloxacin. This active compound not only exhibited low cytotoxicity to mammalian cells (human red blood cells, HepG2 and ECs), but also possessed rapid bactericidal property, good biofilm inhibition ability, and a low propensity to induce K. pneumonia and A. baumanii resistance. Further studies revealed that the inhibitory effect of the active compound 8b might be achieved by disrupting membrane integrity, increasing ROS generation, reducing GSH activity and interacting with DNA. These findings provided a bright hope for developing dihydropyrimidinone imidazoles to combat emergent drug resistance.

European Journal of Medicinal Chemistry published new progress about 620-20-2. 620-20-2 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Benzyl chloride,Benzene, name is 3-Chlorobenzylchloride, and the molecular formula is C17H14F3N3O2S, Recommanded Product: 3-Chlorobenzylchloride.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Liu, Hongyan published the artcileSynthesis and biological evaluation of tryptophan-derived rhodanine derivatives as PTP1B inhibitors and anti-bacterial agents, Formula: C7H6Cl2, the publication is European Journal of Medicinal Chemistry (2019), 163-173, database is CAplus and MEDLINE.

Several series of novel tryptophan-derived rhodanine derivatives were synthesized and identified as potential competitive PTP1B inhibitors and antibacterial agents. Among the compounds studied, I [R = 4-Br] was found to have the best in vitro inhibition activity against PTP1B (IC₅₀ = 0.36 ± 0.02 μM). In addition, the compounds also showed potent inhibition against other PTPs, especially CDC25B. Mol. docking anal. demonstrated that compounds II and I [R = 4-Br] could occupy both the catalytic site and the adjacent pTyr binding site simultaneously. The compounds also showed higher levels of activity against gram-pos. strains, the gram-neg. strain Escherichia coli 1924, and multidrug-resistant gram-pos. bacterial strains. Compounds II, III, IV and I [R = 4-Me, 4-F] had comparable or more potent antibacterial activity than the pos. controls.

European Journal of Medicinal Chemistry published new progress about 620-20-2. 620-20-2 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Benzyl chloride,Benzene, name is 3-Chlorobenzylchloride, and the molecular formula is C7H6Cl2, Formula: C7H6Cl2.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Lee, Jia-Shuai published the artcilePreparation of D-phenylglycinyl derivatives of cefuroxime as double ester prodrugs, HPLC of Formula: 90906-61-9, the publication is Chinese Pharmaceutical Journal (Taipei) (1997), 49(3), 195-205, database is CAplus.

D-Phenylglycine was attached at the 4-COOH of cefuroxime via an ethylidene linkage to form double ester derivatives The D-phenylglycine moiety was considered as a tool for delivering the poorly absorbed cefuroxime through the intestine. The Δ³ â†?Δ² isomerization commonly reported along the preparation of cephalosporin esters was successfully eliminated by adding TBA ⁺HSO₄^– as phase transfer catalyst in the alkylation reaction. The prodrugs were stable in acidic phosphate buffer solutions, but degraded fairly rapidly in pH 7.39 phosphate buffer solution and in rat intestinal mucosa suspension. The t_1/2 for these 2 drugs were 10 min and 5 min resp., indicating that both compounds fail to demonstrate satisfactory stability for formulation as oral prodrugs of cefuroxime.

Chinese Pharmaceutical Journal (Taipei) published new progress about 90906-61-9. 90906-61-9 belongs to chlorides-buliding-blocks, auxiliary class Aliphatic Chain, name is 1-Chloroethyl sulfochloridate, and the molecular formula is C2H4Cl2O3S, HPLC of Formula: 90906-61-9.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Al Musaimi, Othman published the artcileCombining solid phase synthesis and chromatographic purification for efficient peptide manufacture, Application In Synthesis of 42074-68-0, the publication is Chimica Oggi (2020), 38(2), 18-21, database is CAplus.

In recent years, peptides have gained an important position in the drug arena for a variety of treatments. Solid-phase peptide synthesis (SPPS) continues to have a significant impact in both R&D as well as in production of com. peptides. The combination of SPPS with reverse-phase (RP) chromatog. separations allowed for the peptides to be purified to levels suitable for drug usage. Thanks to their chem. and phys. stability to high pressure, chems., temperature and oxidising reagents, polystyrene / divinyl benzene (PS/DVB) resins are the main solid support for peptide synthesis as well as being suitable for the chromatog. purification of the peptides by RP and ion exchange (IEX). Depending on the application, the optimal crosslinking changes, as do the optimal particle size, the uniformity in particle size distribution and the porosity of the resin. The characteristics and applications of the PS/DVB resins are explored in this paper for the synthesis and purification of peptides of com. interest.

Chimica Oggi published new progress about 42074-68-0. 42074-68-0 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Benzyl chloride,Benzene, name is 2-Chlorotrityl chloride, and the molecular formula is C19H14Cl2, Application In Synthesis of 42074-68-0.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Gottumukkala, Aditya L. published the artcileEfficient Formation of Benzylic Quaternary Centers via Palladium Catalysis, HPLC of Formula: 480438-56-0, the publication is ChemSusChem (2013), 6(9), 1636-1639, database is CAplus and MEDLINE.

Pd(O₂CCF₃)₂ and 2,2-bipyridine catalyzed the formation of benzylic quaternary centers from arylboronic acids and β-disubstituted enones. For cyclic substrates, only 1 mol% of palladium is required for full conversion, and a variety of arylboronic acids could be reacted with yields exceeding 90%. 5-Membered cyclic enones were found to be most reactive, followed by 6-membered rings and then 7-membered rings. E.g., reaction of 3-methyl-2-cyclohexenone and PhB(OH)₂ gave 92% I. In the case of acyclic substrates, e.g. (E)-Me₃COCH₂CMe:CHCOMe, 5 mol% Pd was found to be necessary, along with the addition of 20 mol% KSbF6 to afford the highest conversion.

ChemSusChem published new progress about 480438-56-0. 480438-56-0 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Boronic acid and ester,Benzene,Ether,Boronic Acids,Boronic acid and ester, name is 3-Chloro-4-isopropoxyphenylboronic acid, and the molecular formula is C9H12BClO3, HPLC of Formula: 480438-56-0.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Murase, Hiroaki published the artcileSynthesis of polysilanes using Mg and Lewis acid and the consideration of this reaction mechanism, Application of Dichloro(hexyl)(methyl)silane, the publication is Materials Sciences and Applications (2015), 6(6), 576-590, database is CAplus.

Reduction of dichlorosilanes with Mg metal in the presence of LiCl and Lewis acid such as FeCl₂ or ZnCl₂ was found to be the highly practical method for the synthesis of polysilanes (PS). This method is so useful and practical that PS can be prepared by stirring dichlorosilanes at room temperature This method was successfully applied for the synthesis of various types of PS having a linear structure, a cyclic structure and silane-styrene copolymers as another type of PS. The structure of the reaction intermediates was also analyzed. At the initiation stage the results of FD-MS (Field desorption mass spectrometry) and GPC (Gel permeation chromatog.) showed that linear oligomers were mainly formed by stepwise reactions, and then the high polymers and cyclic oligomers were formed in parallel.

Materials Sciences and Applications published new progress about 14799-94-1. 14799-94-1 belongs to chlorides-buliding-blocks, auxiliary class Aliphatic Chain, name is Dichloro(hexyl)(methyl)silane, and the molecular formula is C7H16Cl2Si, Application of Dichloro(hexyl)(methyl)silane.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Hamada, Shohei published the artcileChemoselective Oxidation of p-Methoxybenzyl Ethers by an Electronically Tuned Nitroxyl Radical Catalyst, Safety of 1-(Chloromethyl)-4-(trifluoromethyl)benzene, the publication is Organic Letters (2020), 22(14), 5486-5490, database is CAplus and MEDLINE.

The oxidation of p-methoxy benzyl (PMB) ethers e.g., 1-methoxy-4-[(3-phenylpropoxy)methyl]benzene was achieved using nitroxyl radical catalyst I, which contains electron-withdrawing ester groups adjacent to the nitroxyl group. The oxidative deprotection of the PMB moieties on the hydroxy groups was observed upon treatment of I with 1 equiv of the co-oxidant Ph iodonium bis(trifluoroacetate) (PIFA). The corresponding carbonyl compounds e.g., 3-phenylpropanal were obtained by treating the PMB-protected alcs., e.g., 3-phenylpropan-1-ol, with I and an excess of PIFA.

Organic Letters published new progress about 939-99-1. 939-99-1 belongs to chlorides-buliding-blocks, auxiliary class Fluoride,Chloride,Benzyl chloride,Benzene, name is 1-(Chloromethyl)-4-(trifluoromethyl)benzene, and the molecular formula is C8H6ClF3, Safety of 1-(Chloromethyl)-4-(trifluoromethyl)benzene.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Tanaka, Taisaku published the artcileDiscovery of novel series of 6-benzyl substituted 4-aminocarbonyl-1,4-diazepane-2,5-diones as human chymase inhibitors using structure-based drug design, Name: 2-Chloroisonicotinic acid, the publication is Bioorganic & Medicinal Chemistry (2013), 21(14), 4233-4249, database is CAplus and MEDLINE.

A novel series of 6-benzyl substituted 4-aminocarbonyl-1,4-diazepane-2,5-diones were explored as human chymase inhibitors using structure-based drug design according to the x-ray cocrystal structure of chymase and SUN13834. The optimization focused on the prime site led to the attainment of compounds that showed potent inhibitory activity, and among them, 6-(5-Chloro-2-methoxybenzyl)-3,7-dioxo-N-{(1R)-1-[(1H-tetrazol-5-ylamino)carbonyl]propyl}-1,4-diazepan-1-carboxamide shows a novel interaction mode.

Bioorganic & Medicinal Chemistry published new progress about 6313-54-8. 6313-54-8 belongs to chlorides-buliding-blocks, auxiliary class Pyridine,Chloride,Carboxylic acid, name is 2-Chloroisonicotinic acid, and the molecular formula is C8H6ClF3, Name: 2-Chloroisonicotinic acid.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Bhattacherjee, Debojit published the artcileTrisulfides over disulfides: highly selective synthetic strategies, anti-proliferative activities and sustained H₂S release profiles, Product Details of C7H6Cl2, the publication is Chemical Communications (Cambridge, United Kingdom) (2019), 55(90), 13534-13537, database is CAplus and MEDLINE.

Temperature- and solvent-induced selective synthesis of trisulfides and disulfides is demonstrated. A remarkable selectivity was achieved using Na₂S as a sulfur-transfer agent under mild, greener, catalyst-free and additive-free conditions. This study reveals trisulfides as a better model than disulfides in general for a sustained release of H₂S and potent anti-cancer activities.

Chemical Communications (Cambridge, United Kingdom) published new progress about 620-20-2. 620-20-2 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Benzyl chloride,Benzene, name is 3-Chlorobenzylchloride, and the molecular formula is C7H6Cl2, Product Details of C7H6Cl2.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Ma, Hong published the artcileSynthesis and characterization of branched polysilanes, HPLC of Formula: 14799-94-1, the publication is Sichuan Daxue Xuebao, Ziran Kexueban (2001), 38(6), 863-866, database is CAplus.

Synthesis of the monomers was improved by using the “sequential drop”. By this way, the yield of the monomers was increased, and drain of the materials was decreased as compared with “fully mixing”. Using Wurtz-type coupling of methylphenethyldichlorosilane and trichloromethylsilane branched polysilanes: P(MPES-to-MS) were synthesized by “pre-polymerization” and “mixing polymerization”.

Sichuan Daxue Xuebao, Ziran Kexueban published new progress about 14799-94-1. 14799-94-1 belongs to chlorides-buliding-blocks, auxiliary class Aliphatic Chain, name is Dichloro(hexyl)(methyl)silane, and the molecular formula is C7H16Cl2Si, HPLC of Formula: 14799-94-1.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics