Author: Jessica.F

LeMahieu, Ronald A. published the artcileSubstituted (aryloxy)alkanoic acids as antagonists of slow-reacting substance of anaphylaxis, Related Products of bromides-buliding-blocks, the main research area is aryloxyalkanoic acid preparation leukotriene antagonist activity; slow reacting substance anaphylaxis antagonist preparation; antiasthmatic aryloxyalkanoic acid preparation.

A series of aryloxyalkanoic acids [e.g., I, X = CH2)5, n = 3] containing the 4-acetyl-3-hydroxy-2-propylphenoxy moiety of the standard slow-reacting substances of anaphylaxis (SRS-A) antagonist, FPL-55712, was prepared Thus, dihydroxypropylacetophenone II (R = R1 = H) was successively alkylated by treatment with Br(CH2)3CO2Et and K2CO3 in DMF, followed by Br(CH2)5Br in Me2CO to give II [R = Br(CH2)5, R1 = EtO2C(CH2)3] which was treated with II (R = R1 = H) and K2CO3, and then NaOH in aqueous MeOH to give I [X = (CH2)5, n = 3]. The compounds were evaluated for their ability to antagonize SRS-A-induced contractions of guinea pig ilea and leukotriene E4-induced bronchoconstriction in the guinea pig. The results showed that the compounds were all less potent than FPL-55712 in vitro, yet surprisingly, most were more potent by the inhalation route of administration. Some of the most potent analogs were selected for further pharmacol. evaluation and exhibited selective antagonism of leukotrienes as compared with platelet activating factor or histamine. In comparison to FPL-55712, compounds I [X = (CH2)5 n = 1] and I [X = (CH2)3O(CH2)3, n = 3] were more potent against leukotriene E4 and (40- and 80-fold, resp.), leukotriene D4 (4- and 3-fold, resp.), and leukotriene C4 (27- and 20-fold, resp.) induced bronchoconstriction when tested by inhalation.

Journal of Medicinal Chemistry published new progress about Antiasthmatics. 58929-72-9 belongs to class bromides-buliding-blocks, name is 1-Bromo-3-(3-bromopropoxy)propane, and the molecular formula is C6H12Br2O, Related Products of bromides-buliding-blocks.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Seemaisamy, Revathi published the artcileAnti-microbial and anti-cancer activity of Aegle marmelos and gas chromatography coupled spectrometry analysis of their chemical constituents, Application In Synthesis of 55099-31-5, the main research area is Staphylococcus Bacillus Aegle breast cancer cell anticancer antimicrobial.

In this study, we investigated anti-cancer and antimicrobial activity of Aegle marmelos leaf extracts and their chem. profile characterized by gas chromatog. coupled mass spectrometry (GC-MS). A. marmelos leaves were extracted with acetone, methanol, ethanol, and chloroform. Presence of phenolic compounds was identified in these extracts by qual. anal. All the extracts were subjected for anti-bacterial activity against the different strains of bacteria (Staphylococcus aureus, Bacillus subtilis, Bacillus cereus, Bacillus ariyabattai, Bacillus megaterium, Pseudomonas putida, Klebsiella pneumonia, Serratia marcescens, and Escherichia coli). It is noteworthy that acetone extract elicited maximum growth inhibition on Serratia marcescens. Based on profound anti bacterial activity, acetone and methanol extract of A. marmelos were checked for cytotoxicity against MDA-MB-231, HEp-2 and vero cells. MDA-MB-231 cells were more sensitive to acetone extract of A. marmelos with an IC50 value of 79.62 μg/mL where as HEp-2 cells are more sensitive to methanol extract of A. marmelos with an IC50 value of 47.08 μg/mL. Vero cells withstand 24 h treatment of both extract, and it is evidenced that both acetone and methanol extract of A. marmelos exhibited chemo sensitive property towards cancer cells. GCMS anal. was performed to characterize the active principles of acetone and methanol extracts of A. marmelos. GC MS data revealed the presence of ten major components. Overall, both acetone and methanol extract of A. marmelos found to be promising anti antibacterial and anti-cancer agent however the active principle of these should be isolated and characterized before reaching a concrete scientific conclusion.

International Journal of Pharmaceutical Sciences and Research published new progress about Aegle marmelos. 55099-31-5 belongs to class bromides-buliding-blocks, name is Ethyl 10-bromodecanoate, and the molecular formula is C12H23BrO2, Application In Synthesis of 55099-31-5.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Garner, Charles W. published the artcileBoronic acid inhibitors of porcine pancreatic lipase, Computed Properties of 74386-13-3, the main research area is lipase pancreas inhibition boronic acid.

Porcine pancreatic lipase was inhibited by alkane and arene boronic acids. The inhibition by octadecane boronic acid was competitive when measured against the hydrolysis of dissolved tripropionin in the presence of siliconized glass beads. The value of Ki in this system was 1.34 × 103 mols. μm-2. The ratio of substrate to inhibitor concentrations giving 50% inhibition was in the range 700-2200, indicating that lipase has a greater affinity for boronic acids than for tripropionin. Boronic acids did not interfere with the interaction of lipase with the siliconized glass/water interface, demonstrating that the binding of lipase to substrate interfaces, the 1st step in lipase action, was not the step at which inhibition occurred. The boronic acid binding site on lipase is at or near the active center serine since modification of this residue by di-Et p-nitrophenyl phosphate was prevented by boronic acids. Modification of the active center serine residue by di-Et p-nitrophenyl phosphate also prevented boronic acid binding. Binding of a chromophoric boronic acid, 7-nitrobenzo-2-oxa-1,3-diazolyl m-aminobenzene boronic acid, to lipase was demonstrated by equilibrium gel filtration on polyacrylamide beads (Bio-Gel P-60) in the presence of 4 mM Na taurodeoxycholate. The complex contained 1 mol. of boronic acid/mol. of lipase and had a dissociation constant of 5 × 10-6 M. The boronic acid was not bound in the absence of taurodeoxycholate. Boronic acids are apparently analogs of the tetrahedral intermediate in the action of lipase.

Journal of Biological Chemistry published new progress about Enzyme kinetics. 74386-13-3 belongs to class bromides-buliding-blocks, name is 4-Bromo-3-nitrophenylboronic acid, and the molecular formula is C6H5BBrNO4, Computed Properties of 74386-13-3.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Dey, Mishtu published the artcileCharacterization of Alkyl-Nickel Adducts Generated by Reaction of Methyl-Coenzyme M Reductase with Brominated Acids, SDS of cas: 56523-59-2, the main research area is methyl coenzyme M reductase active site electron transfer.

Methyl-coenzyme M reductase (MCR) from methanogenic archaea catalyzes the final step in the biol. synthesis of methane. Using coenzyme B (CoBSH) as the two-electron donor, MCR reduces methyl-coenzyme M (methyl-SCoM) to methane and the mixed disulfide, CoB-S-S-CoM. MCR contains coenzyme F430, an essential redox-active nickel tetrahydrocorphin, at its active site. The active form of MCR (MCRred1) contains Ni(I)-F430. When 3-bromopropane sulfonate (BPS) is incubated with MCRred1, an alkyl-Ni(III) species is formed that elicits the MCRPS EPR signal. Here we used EPR and UV-visible spectroscopy and transient kinetics to study the reaction between MCR from Methanothermobacter marburgensis and a series of brominated carboxylic acids, with carbon chain lengths of 4-16. All of these compounds give rise to an alkyl-Ni intermediate with an EPR signal similar to that of the MCRPS species. Reaction of the alkyl-Ni(III) adduct, formed from brominated acids with eight or fewer total carbons, with HSCoM as nucleophile at pH 10.0 results in the formation of a thioether coupled to regeneration of the active MCRred1 state. When reacted with 4-bromobutyrate, MCRred1 forms the alkyl-Ni(III) MCRXA state and then, surprisingly, undergoes “”self-reactivation”” to regenerate the Ni(I) MCRred1 state and a bromocarboxy ester. The results demonstrate an unexpected reactivity and flexibility of the MCR active site in accommodating a broad range of substrates, which act as mol. rulers for the substrate channel in MCR.

Biochemistry published new progress about Electron donors. 56523-59-2 belongs to class bromides-buliding-blocks, name is 15-Bromopentadecanoic acid, and the molecular formula is C15H29BrO2, SDS of cas: 56523-59-2.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Tanaka, Shinji published the artcileSystematic asymmetric analog synthesis of fluspidine, a σ1 receptor ligand, to improve ligand affinity, COA of Formula: C8H7BrO3, the main research area is fluspidine systematic asym preparation sigma receptor ligand.

Herein, fluspidine analogs I (R1 = H, 5-F, 6-Cl, 6-MeO, etc.; R2 = Ph, 3-FC6H4, 4-MeOC6H4, etc.; R3 = CH2F, CH2Cl, CH2Br, CH2I, COOH) were systematically synthesized and screened to improve the ligand affinity. To design the modified ligand analogs, a docking simulation of the protein-ligand complex structure was examined By using the developed synthetic strategy involving asym. catalytic 1,4-reduction of α,β-unsaturated carboxylic esters catalyzed by a chiral cobalt complex, 20 candidates of modified fluspidines were synthesized. The structure-activity relationships showed the development of a hybridized modified fluspidine. In addition, the inhibitory rate could be improved from 45% to 71%. This result demonstrated the importance of the development of a new synthetic method toward improving the ligand performance by providing a series of analogs.

Tetrahedron Letters published new progress about Drug metabolism. 74317-85-4 belongs to class bromides-buliding-blocks, name is 2-Bromo-4-methoxybenzoic acid, and the molecular formula is C8H7BrO3, COA of Formula: C8H7BrO3.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Villalgordo, Jose M. published the artcileNovel Regioselective Synthesis of Urolithin Glucuronides-Human Gut Microbiota Cometabolites of Ellagitannins and Ellagic Acid, Quality Control of 74317-85-4, the main research area is urolithin glucuronide synthesis gut microbiota metabolite ellagitannin ellagate; ellagic acid; glucuronides; gut microbiota metabolites; synthesis; urolithins.

Urolithins (dibenzo-pyran-[b,d]-6 one derivatives) are human gut microbiota metabolites produced from the natural food antioxidant ellagic acid. Urolithins are better absorbed than ellagic acid and demonstrate biol. activities that suggest that they are responsible for the health effects observed after consuming ellagitannin- and ellagic acid-containing foods. Urolithins occur in the systemic circulation as glucuronide conjugates following phase II metabolism These phase II conjugates are essential for testing the urolithin mechanisms of action in human cell line bioassays. Urolithin glucuronides are not com. available, and their biosynthesis leads to mixtures of regional isomers. This study describes a novel and regioselective synthesis of urolithin A (3,8-dihydroxy urolithin) 3- and 8-glucuronides and isourolithin A (3,9-dihydroxy urolithin) 3- and 9-glucuronides. The metabolites were characterized using 1H and 13C NMR spectroscopy and UV spectrophotometry. The presence of these metabolites in human subjects belonging to different urolithin metabotypes was also investigated.

Journal of Agricultural and Food Chemistry published new progress about Drug metabolism. 74317-85-4 belongs to class bromides-buliding-blocks, name is 2-Bromo-4-methoxybenzoic acid, and the molecular formula is C8H7BrO3, Quality Control of 74317-85-4.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Katz, Eugenii published the artcileElectron transfer in self-assembled monolayers of N-methyl-N’-carboxyalkyl-4,4′-bipyridinium linked to gold electrodes, Computed Properties of 56523-59-2, the main research area is electron transfer methylcarboxyalkylbipyridinium gold electrode; cystamine bipyridine derivative electrode modification; chemisorption adsorption electrode modification; redox electrochem tunneling electrode modification; alkylbipyridinium modification kinetics electron transfer.

Electron transfer processes in monolayer assemblies formed by covalent linkage of N-methyl-N’-carboxyalkyl-4,4′-bipyridinium (1) to cystamine, chemisorbed onto Au electrodes, are examined The resulting monolayer exhibits nonordered structure being reflected by a similar rate constant to the bipyridinium redox sites, that is independent of the bridging alkyl chain length, ket = 550 s-1. The nonordered structure is also confirmed by the low electron transfer coefficients αa and αc, corresponding to 0.25 ± 0.05 and 0.3 ± 0.05, resp. By treatment of the nonordered monolayer assembly with 1-hexadecanethiol, C16SH, a more densely packed organized monolayer is formed, where the alkyl-substituted bipyridinium sites are stretched in the monolayer configuration. In these assemblies the electron transfer rate constants to the bipyridinium sites depend on the alkyl chain length bridging the redox site to the electrode. The electron transfer rate constants follow Marcus theory and the electron tunneling coefficient corresponds to β = 0.006 A-1.

Langmuir published new progress about Chemical chains. 56523-59-2 belongs to class bromides-buliding-blocks, name is 15-Bromopentadecanoic acid, and the molecular formula is C15H29BrO2, Computed Properties of 56523-59-2.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Najdek, Mirjana published the artcileFatty acid and phytoplankton compositions of different types of mucilaginous aggregates in the northern Adriatic, Synthetic Route of 56523-59-2, the main research area is fatty acid phytoplankton mucilaginous aggregate Adriatic Ocean.

The biomarkers (fatty acid proportions and ratios characteristic of phytoplankton and bacteria) and phytoplankton species in small (0.5-2.0 cm) and large (0.5-5 m) marine aggregates were determined in samples from the northern Adriatic Sea, during a mucilage event in 1997, as well as in 1993, 1994 and 1998, when events were not observed Types of aggregates were identified according to various biomarker relations, particularly those related to bacterial and phytoplankton activities and changes in the diatom species composition Aged mucilaginous aggregates (summer 1997) showed fatty acid proportions (16P/18P, 3.9-7.7) characteristic of the highest phytoplankton activities, and also showed the highest bacterial fatty acid proportions (13.3-17.1%) and ratios (C15:br/C15:0, 4.4-6.0). They showed an different diatom community (dominated by Cylindrotheca closterium) from that in surrounding waters. These characteristics suggest a continuous renewal of the aggregate organic matter, supporting the hypothesis that aggregate is a self-sustaining community. In contrast, both freshly formed marine snow, dominant during periods without mucilage events, and freshly formed mucilaginous aggregates presented biomarker proportions and ratios similar to those of suspended matter (bacterial fatty acids 3-6.7%, C15:br/C15:0 1.2-4.6, 16P/18P 0.4-4.0), and diatom composition similar to that of the ambient water. This indicates that marine snow sinks more rapidly than large aggregates, before significant changes can occur in its plankton composition Other aging aggregate types showed intermediate characteristics, suggesting that their residence times in the water column were still sufficient to develop organic production-decomposition cycles that modified to various extents their biochem. composition

Journal of Plankton Research published new progress about Bacillariophyta. 56523-59-2 belongs to class bromides-buliding-blocks, name is 15-Bromopentadecanoic acid, and the molecular formula is C15H29BrO2, Synthetic Route of 56523-59-2.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Carson, J. R. published the artcile2-Ethynylbenzenealkanamines. A new class of calcium entry blockers, Recommanded Product: 1-Bromo-4-fluoro-2-methylbenzene, the main research area is acetylenic benzenealkanamine calcium blocker; amine araliph calcium blocker; araliph amine antihypertensive vasodilator.

A series of 2-[aryl(alkyl)ethynyl]benzenealkanamines was synthesized. The compounds exhibit antihypertensive activity in spontaneously hypertensive rats and coronary vasodilator activity with minimal neg. inotropic activity in the Langendorff guinea pig heart in vitro. They exert their activity by inhibition of Ca2+ influx across cell membranes. Optimal activity is found among the N-(arylethyl)-5-methoxy-α-methyl-2-(phenylethynyl)benzeneethanamines and -propanamines, e.g., I.

Journal of Medicinal Chemistry published new progress about Angina pectoris. 452-63-1 belongs to class bromides-buliding-blocks, name is 1-Bromo-4-fluoro-2-methylbenzene, and the molecular formula is C7H6BrF, Recommanded Product: 1-Bromo-4-fluoro-2-methylbenzene.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Nishiyama, Yuko published the artcileStructure-activity relationship-guided development of retinoic acid receptor-related orphan receptor gamma (RORγ)-selective inverse agonists with a phenanthridin-6(5H)-one skeleton from a liver X receptor ligand, Synthetic Route of 74317-85-4, the main research area is retinoate receptor orphan gamma ROR phenanthridinone skeleton liver X; Inverse agonist; LXR; Phenanthridinone; ROR.

Retinoic acid receptor-related orphan receptors (RORs), which belong to the nuclear receptor superfamily, regulate many physiol. processes, including hepatic gluconeogenesis, lipid metabolism, immune function and circadian rhythm. Since RORs resemble liver X receptors (LXRs) in the fold structure of their ligand-binding domains, the authors speculated that ROR-mediated transcription might be modulated by LXR ligands, in line with the multi-template hypothesis. Therefore, the authors screened the authors’ LXR ligand library for compounds with ROR ligand activity and identified a novel ROR ligand with a phenanthridin-6(5H)-one skeleton. Structure-activity relationship studies aimed at separating ROR inverse agonistic activity from LXR-agonistic activity enabled the authors to develop a series of ROR inverse agonists based on the phenanthridin-6(5H)-one skeleton, including a RORγ-selective inverse agonist.

Bioorganic & Medicinal Chemistry published new progress about Circadian rhythm. 74317-85-4 belongs to class bromides-buliding-blocks, name is 2-Bromo-4-methoxybenzoic acid, and the molecular formula is C8H7BrO3, Synthetic Route of 74317-85-4.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary