Tag: M.W=200-250

Nikulin, M. V. published the artcilePalladium-catalyzed arylation of bis(4-bromo-2-methylinden-1-yl)dimethylsilane and related compounds, Recommanded Product: 7-Bromo-2-methyl-1H-indene, the main research area is palladium catalyst arylation bromomethylindenyl dimethylsilane zirconocene.

A new procedure was developed for the synthesis of a broad range of ansa-zirconocenes containing bis(2-methyl-4-arylindenyl)dimethylsilane ligands. The method is based on the palladium-catalyzed reaction of halogen-substituted bis(indenyl)dimethylsilanes with various organozinc compounds The aryl-substituted bridging ligands thus prepared serve as the starting compounds for the synthesis of ansa-zirconocenes, which can be used as components of promising catalysts for propylene polymerization

Russian Chemical Bulletin published new progress about Arylation catalysts. 880652-93-7 belongs to class bromides-buliding-blocks, name is 7-Bromo-2-methyl-1H-indene, and the molecular formula is C10H9Br, Recommanded Product: 7-Bromo-2-methyl-1H-indene.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Moreno-Sanz, Guillermo published the artcileSynthesis and Structure-Activity Relationship Studies of O-Biphenyl-3-yl Carbamates as Peripherally Restricted Fatty Acid Amide Hydrolase Inhibitors, COA of Formula: C8H7BrO3, the main research area is biphenyl carbamate preparation peripherally restricted FAAH inhibitor SAR; URB937 analog brain impermeant fatty acid amide hydrolase inhibitor; restricted access central nervous system biphenyl carbamate derivative.

The peripherally restricted fatty acid amide hydrolase (FAAH) inhibitor URB937 (I, cyclohexylcarbamic acid 3′-carbamoyl-6-hydroxybiphenyl-3-yl ester) is extruded from the brain and spinal cord by the Abcg2 efflux transporter. Despite its inability to enter the central nervous system (CNS), I exerts profound antinociceptive effects in mice and rats, which result from the inhibition of FAAH in peripheral tissues and the consequent enhancement of anandamide signaling at CB1 cannabinoid receptors localized on sensory nerve endings. In the present study, we examined the structure-activity relationships (SAR) for the biphenyl region of compound I, focusing on the carbamoyl and hydroxyl groups in the distal and proximal Ph rings. Our SAR studies generated a new series of peripherally restricted FAAH inhibitors and identified compound II (cyclohexylcarbamic acid 3′-carbamoyl-5-hydroxybiphenyl-3-yl ester) as the most potent brain-impermeant FAAH inhibitor disclosed to date.

Journal of Medicinal Chemistry published new progress about Blood-brain barrier. 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

Volkov, Oleg A. published the artcileSpecies-Selective Pyrimidineamine Inhibitors of Trypanosoma brucei S-Adenosylmethionine Decarboxylase, SDS of cas: 123158-68-9, the main research area is pyrimidineamine preparation trypanosomicide Trypanosoma adenosylmethionine decarboxylase inhibitor.

New therapeutic options are needed for treatment of human African trypanosomiasis (HAT) caused by protozoan parasite Trypanosoma brucei. S-Adenosylmethionine decarboxylase (AdoMetDC) is an essential enzyme in the polyamine pathway of T. brucei. Previous attempts to target this enzyme were thwarted by the lack of brain penetration of the most advanced series. Herein, the authors describe a T. brucei AdoMetDC inhibitor series based on a pyrimidineamine pharmacophore that the authors identified by target-based high-throughput screening. The pyrimidineamines showed selectivity for T. brucei AdoMetDC over the human enzyme, inhibited parasite growth in whole-cell assay, and had good predicted blood-brain barrier penetration. The medicinal chem. program elucidated structure-activity relationships within the series. Features of the series that were required for binding were revealed by determining the x-ray crystal structure of TbAdoMetDC bound to one analog. The pyrimidineamine series provides a novel starting point for an anti-HAT lead optimization.

Journal of Medicinal Chemistry published new progress about Blood-brain barrier. 123158-68-9 belongs to class bromides-buliding-blocks, name is 3-Bromo-5-ethylaniline, and the molecular formula is C8H10BrN, SDS of cas: 123158-68-9.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Kondo, Hiroki published the artcileBranch-Selective Allylic C-H Carboxylation of Terminal Alkenes by Pd/sox Catalyst, SDS of cas: 74317-85-4, the main research area is regioselective carboxylation terminal alkene carboxylic acid palladium SOX catalyst; branched allylic ester preparation.

A ligand-controlled branch-selective allylic C-H carboxylation through Pd catalysis is described. The developed catalytic system, which consists of Pd(OAc)2, sulfoxide-oxazoline (sox) as a ligand and benzoquinone as an oxidant, couples terminal alkenes and carboxylic acids to furnish the corresponding branched allylic esters with high regioselectivity.

Organic Letters published new progress about C-H bond activation. 74317-85-4 belongs to class bromides-buliding-blocks, name is 2-Bromo-4-methoxybenzoic acid, and the molecular formula is C8H7BrO3, SDS of cas: 74317-85-4.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Rover, Stephan published the artcile6-Alkoxy-5-aryl-3-pyridinecarboxamides, a New Series of Bioavailable Cannabinoid Receptor Type 1 (CB1) Antagonists Including Peripherally Selective Compounds, Formula: C6H4BrNO3, the main research area is alkoxy arylpyridinecarboxamide preparation bioavailable cannabinoid CB1 antagonist.

The authors identified 6-alkoxy-5-aryl-3-pyridinecarboxamides as potent CB1 receptor antagonists with high selectivity over CB2 receptors. The series was optimized to reduce lipophilicity compared to rimonabant to achieve peripherally active mols. with minimal central effects. Several compounds that showed high plasma exposures in rats were evaluated in vivo to probe the contribution of central vs peripheral CB1 agonism to metabolic improvement. Both rimonabant and I, a potent brain penetrant CB1 receptor antagonist, significantly reduced the rate of body weight gain. However, II, a mol. with markedly reduced brain exposure, had no significant effect on body weight PK studies confirmed similarly high exposure of both I and II in the periphery but 10-fold lower exposure in the brain for II. On the basis of these data, which are consistent with reported effects in tissue-specific CB1 receptor KO mice, it was concluded that the metabolic benefits of CB1 receptor antagonists are primarily centrally mediated as originally believed.

Journal of Medicinal Chemistry published new progress about Antiobesity agents. 41668-13-7 belongs to class bromides-buliding-blocks, name is 5-Bromo-6-hydroxynicotinic acid, and the molecular formula is C6H4BrNO3, Formula: C6H4BrNO3.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Scholz, Johannes published the artcileSynthesis of diisocyanides with phenolic groups and their polymerization to helically chiral poly(quinoxaline-2,3-diyl)s, Application In Synthesis of 10172-35-7, the main research area is helically chiral polyquinoxaline diyl stability organocatalyst.

The development of synthetic routes which lead to five new diisocyanide monomers with one or two phenolic groups is described. Their polymerization behavior is studied with Pd- and Ni-based initiators, as well as under microwave irradiation The polymerizability is mainly dominated by steric effects as is concluded from experiments using different protecting groups. Chiroptical properties of these new polymers are studied by CD-spectroscopy. After deprotection, helically chiral poly(quinoxalin-2,3-diyl)s are obtained which display a Bronsted function attached to a stereolabile biaryl axis whose configuration should be influenced by the chiral polymer backbone. © 2015 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2015.

Journal of Polymer Science, Part A: Polymer Chemistry published new progress about Circular dichroism. 10172-35-7 belongs to class bromides-buliding-blocks, name is 2-Bromo-4-methoxy-6-nitroaniline, and the molecular formula is C7H7BrN2O3, Application In Synthesis of 10172-35-7.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Kolluru, Srinivas published the artcileNickel-Catalyzed Annulations of ortho-Haloarylimines, Safety of Ethyl 2-bromo-4-fluorobenzoate, the main research area is nickel catalyzed annulation ortho haloarylimine anti selectivity; amines; catalysis; chemometrics; kinetics; mechanism; nickel; reaction parametrization; spectroscopy; spirocycles.

We report the discovery, development, and mechanism of a nickel-catalyzed annulation reaction between o-haloarylimines and electron-poor olefins. The reaction produces two adjacent anti stereocenters and a free secondary amine. Spirocycles are formed from cyclic imines. We characterized the key oxidative addition intermediate and identified a major path leading to competing homocoupling products. The activation energy of oxidative addition and the rate of oxidative addition complex isomerization were determined The sensitivity of the reaction to reaction conditions was established in a quant. manner and both the scope and limitations of the method are presented.

ACS Catalysis published new progress about Activation energy. 651341-68-3 belongs to class bromides-buliding-blocks, name is Ethyl 2-bromo-4-fluorobenzoate, and the molecular formula is C9H8BrFO2, Safety of Ethyl 2-bromo-4-fluorobenzoate.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Wang, Degui published the artcileFree radical induced oxidation of phloroglucinol. A pulse radiolysis and EPR study, Category: bromides-buliding-blocks, the main research area is radical induced oxidation phloroglucinol ESR; pulse radiolysis phloroglucinol.

Phloroglucinol (I)-derived radicals have been studied using pulse radiolysis and EPR spectroscopy. I (pKa = 8.0) and its anion (II) (pKa = 9.2) have phenolic structures while the 3,5-dihydrocyclohex-2,5-dienone structure predominates in the dianion (III). The neutral OH-adduct radicals (IIIa; λmax = 345 nm) rapidly eliminate water (k = 2 × 105 s-1) yielding the 3,5-dihydroxyphenoxyl radical (IV; λmax = 495 nm, pKa = 6.5). IV and its monoanion (V; λmax = 550 nm, pKa = 8.6), its isomer VI, derived from III (λmax > 800 nm), and the dianion (VII; λmax = 640 nm) can be generated directly with the N3 radical (k = 1.4 × 109 dm3 mol-1 s-1 at pH 6). All four radicals have been characterized by EPR. VI reacts with the phloroglucinol monoanion II with a rate constant of 2 × 107 dm3 mol-1 s-1. Formation of an adduct is excluded by EPR. Therefore, electron transfer from II to VI is favored as an explanation for this reaction. IV does not react with O2 (k < 4 × 105 dm3 mol-1 s-1); the anions V and VI do so quite rapidly (k = 2.1 × 108 and 1.9 × 108 dm3 mol-1 s-1, resp.) and at pH 7, O2 is consumed with G = 15 × 10-7 mol J-1. Although Br2•- mainly produces radicals IV and V, bromination occurs with an efficiency of at least 10%. Journal of the Chemical Society, Perkin Transactions 3: Physical Organic Chemistry published new progress about Autoxidation kinetics. 84743-77-1 belongs to class bromides-buliding-blocks, name is 2-Bromobenzene-1,3,5-triol, and the molecular formula is C6H5BrO3, Category: bromides-buliding-blocks.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Zhang, Nan published the artcileModification of 5-methylphenanthridium from benzothiazoles to indoles as potent FtsZ inhibitors: Broadening the antibacterial spectrum toward vancomycin-resistant enterococci, Synthetic Route of 74317-85-4, the main research area is vancomycin resistant Enterococci 5 methylphenanthridium benzothiazoles FtsZ inhibitors; Antibacterial activity; Benzothiazolyl-5-methylphenanthridium; FtsZ inhibitors; Indolyl-5-methylphenanthridium; Mechanism of action.

The death caused by pathogenic bacteria has always been a severe threat to mankind. The prevalence of drug resistance among bacteria underscores an urgent goal for new antibacterial agents with novel mode of action. Here we first designed and synthesized a class of benzothiazolyl-5-methylphenanthridium derivatives and evaluated their antibacterial activity. On this basis, we further designed and synthesized another class of novel indolyl-5-methylphenanthridium derivatives by optimizing the benzothiazolyl-5-methylphenanthridium core and evaluated their antibacterial activity targeting the bacterial cell division protein FtsZ. The results showed that the indolyl-5-methylphenanthridium derivatives had greatly improved activity against various drug-resistant bacterial strains including methicillin-resistant Staphylococcus aureus and vancomycin-resistant Enterococcus (VRE). Among them, compound C5 displayed excellent antibacterial activity against susceptible (MIC = 1μg/mL), methicillin-resistant and clin. isolated S. aureus (MIC = 2μg/mL). With low hemolytic activity towards mice red blood cells, C5 exhibited good antibacterial effect in vivo in preliminary pharmacodynamic assay. More importantly, C5 was difficult to induce bacterial resistance. Further mechanism studies proved that C5 could inhibit bacterial cell division by promoting FtsZ polymerization, leading to disorderly polymerization and disordered knots. Therefore, our findings suggest that this class of novel indolyl-5-methylphenanthridium derivatives are promising for future antibacterial agents.

European Journal of Medicinal Chemistry published new progress about Antibacterial agents. 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

Trost, Barry M. published the artcileSulfones as Synthetic Linchpins: Transition-Metal-Free sp3-sp2 and sp2-sp2 Cross-Couplings Between Geminal Bis(sulfones) and Organolithium Compounds, Application of 2-Bromo-4-methoxybenzoic acid, the main research area is substituted dihydronaphthalene preparation; geminal bis sulfone organolithium compound coupling; cross-coupling; sulfones; synthesis design; transition-metal-free; umpolung.

A valuable umpolung strategy that highlights the ambiphilic nature of the bis(phenylsulfonyl)methyl synthons and demonstrates its utility as a synthetic linchpin is reported. Alkyl- and aryllithiums couple with the central carbon of the bis(phenylsulfonyl)methyl unit to ultimately generate trisubstituted alkenes I [R = H, 6-MeO, 7-F, etc.; R1 = n-Bu, Ph, (CH2)2C6H5, etc.], comprising formal sp3-sp2 and sp2-sp2 cross-couplings between organolithium reagents and bis(sulfones). This process occurs almost instantaneously at -78 °C in the absence of any transition metals. By developing this curious transformation, it has been demonstrated that bis(phenylsulfonyl)methane is a valuable synthetic linchpin, which can undergo two C-C bond-forming processes as an sp3-nucleophile, followed by a third C-C bond-forming reaction as an effective sp2-electrophile. This discovery significantly enhances the utility of this ubiquitous, but underutilized, linker group.

Chemistry – A European Journal published new progress about Acidity function, Hammett. 74317-85-4 belongs to class bromides-buliding-blocks, name is 2-Bromo-4-methoxybenzoic acid, and the molecular formula is C8H7BrO3, Application of 2-Bromo-4-methoxybenzoic acid.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary