Category: bromides-buliding-blocks

Moon, Patrick J.; Yin, Shengkang; Lundgren, Rylan J. published the artcile< Ambient Decarboxylative Arylation of Malonate Half-Esters via Oxidative Catalysis>, Related Products of 14062-30-7, the main research area is monoaryl acetate preparation; decarboxylative arylation coupling arylboron nucleophile malonic acid.

We report decarboxylative carbonyl α-arylation by coupling of arylboron nucleophiles with malonic acid derivatives This process is enabled by the merger of aerobic oxidative Cu catalysis with decarboxylative enolate interception reminiscent of malonyl-CoA reactivity in polyketide biosynthesis. This method enables the synthesis of monoaryl acetate derivatives containing electrophilic functional groups that are incompatible with existing α-arylation reactivity paradigms. The utility of the reaction is demonstrated in drug intermediate synthesis and late-stage functionalization.

Journal of the American Chemical Society published new progress about Arylation. 14062-30-7 belongs to class bromides-buliding-blocks, and the molecular formula is C10H11BrO2, Related Products of 14062-30-7.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Garcia, Kevin J.; Gilbert, Michael M.; Weix, Daniel J. published the artcile< Nickel-Catalyzed Addition of Aryl Bromides to Aldehydes To Form Hindered Secondary Alcohols>, Formula: C9H11Br, the main research area is aryl halide aldehyde nickel catalyst zinc reducing agent addition; hindered secondary alc preparation.

Transition-metal-catalyzed addition of aryl halides across carbonyls remains poorly developed, especially for aliphatic aldehydes and hindered substrate combinations. We report here that simple nickel complexes of bipyridine and PyBox can catalyze the addition of aryl halides to both aromatic and aliphatic aldehydes using zinc metal as the reducing agent. This convenient approach tolerates acidic functional groups that are not compatible with Grignard reactions, yet sterically hindered substrates still couple in high yield (33 examples, 70% average yield). Mechanistic studies show that an arylnickel, and not an arylzinc, adds efficiently to cyclohexanecarboxaldehyde, but only in the presence of a Lewis acid co-catalyst (ZnBr2).

Journal of the American Chemical Society published new progress about Addition reaction. 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, Formula: C9H11Br.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Albano, Gianluigi; Colli, Tony; Biver, Tarita; Aronica, Laura Antonella; Pucci, Andrea published the artcile< Photophysical properties of new p-phenylene- and benzodithiophene-based fluorophores for luminescent solar concentrators (LSCs)>, COA of Formula: C8H5BrS2, the main research area is photophys property phenylene benzodithiophene based fluorophore luminescent solar concentrator.

In this study, we report on the synthesis of new organic fluorophores containing either the p-phenylene or the benzodithiophene cyclic nucleus connected to thiophene units via triple bonds and carbonyl group, and on their application for the fabrication of luminescent solar concentrators (LSCs). Their optical properties were evaluated. Independent of the core, dyes containing the CO-thiophene residues seem to be the most promising for LSCs applications. In fact, carbonyl groups slightly enhance the quantum yield but significantly increase the red-shift of the emission so that the superimposition between the absorbance spectrum and the emission one is diminished. In the case of the benzodithiophene center, light emission in the yellow-red portion of the spectrum is achieved. The latter dye is then selected for tests in a poly(Me methacrylate) (PMMA) matrix. It showed good compatibility and homogenous distribution, no auto-absorption phenomena, and optical efficiencies of about 8% at 1 weight %, i.e. comparable with those PMMA/Lumogen Red films in the same range of concentration

Dyes and Pigments published new progress about Fluorescent substances. 3480-11-3 belongs to class bromides-buliding-blocks, and the molecular formula is C8H5BrS2, COA of Formula: C8H5BrS2.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Garcia-Rodriguez, Jose; Mendiratta, Saurabh; White, Michael A.; Xie, Xiao-Song; De Brabander, Jef K. published the artcile< Synthesis and structure-activity studies of the V-ATPase inhibitor saliphenylhalamide (SaliPhe) and simplified analogs>, HPLC of Formula: 6942-39-8, the main research area is salicylihalamide synthesis anticancer antiviral structure activity relationship; VATPase inhibitor salicylihalamide analog preparation; Anticancer; Antiviral; Benzolactone; Salicylihalamide; V-ATPase.

An efficient total synthesis of the potent V-ATPase inhibitor saliphenylhalamide (SaliPhe), a synthetic variant of the natural product salicylihalamide A (SaliA), has been accomplished aimed at facilitating the development of SaliPhe as an anticancer and antiviral agent. This new approach enabled facile access to derivatives for structure-activity relationship studies, leading to simplified analogs that maintain SaliPhe’s biol. properties. These studies will provide a solid foundation for the continued evaluation of SaliPhe and analogs as potential anticancer and antiviral agents.

Bioorganic & Medicinal Chemistry Letters published new progress about Antitumor agents. 6942-39-8 belongs to class bromides-buliding-blocks, and the molecular formula is C8H6BrFO2, HPLC of Formula: 6942-39-8.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Schmidt, Olivia P.; Blackmond, Donna G. published the artcile< Temperature-Scanning Reaction Protocol Offers Insights into Activation Parameters in the Buchwald-Hartwig Pd-Catalyzed Amination of Aryl Halides>, HPLC of Formula: 401-78-5, the main research area is temperature scanning reaction protocol Buchwald Hartwig amination activation parameter.

A temperature-scanning reaction (TSR) protocol allows deconvolution of the driving forces of concentration and temperature in a single experiment, demonstrated here for the Buchwald-Hartwig amination reaction using different amine substrates that exhibit different rate-determining steps. An Eyring anal. reveals that the observed reactivity differences between 1-hexylamine and benzophenone hydrazone are related primarily to the different contributions of activation entropy in the two cases. This TSR protocol combined with other in situ kinetic methodologies including reaction progress kinetic anal. and variable time normalization anal. provides a rapid and comprehensive mechanistic picture of complex multistep catalytic reactions.

ACS Catalysis published new progress about Activation enthalpy. 401-78-5 belongs to class bromides-buliding-blocks, and the molecular formula is C7H4BrF3, HPLC of Formula: 401-78-5.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Li, Xia; Xu, Hui; Shi, Ji-Long; Hao, Huimin; Yuan, Hong; Lang, Xianjun published the artcile< Salicylic acid complexed with TiO2 for visible light-driven selective oxidation of amines into imines with air>, Recommanded Product: 4-Bromobenzylamine, the main research area is salicylic acid complexed anatase visible light selective oxidation amines; selective oxidation amine imines air.

The interplay of salicylic acid (SA) and reactive oxygen species (ROS) can modulate biotic and abiotic stress of plants, essential biol. aerobic oxidation processes. Meanwhile, ROS plays a critical role in TiO2 photocatalytic system for the degradation of organic species. Herein, we developed a system consisted of SA and TiO2 aiming at the selective oxidation of organic mols. by ROS. Interestingly, SA complexed with TiO2 leads to ligand-to-metal charge transfer (LMCT) under visible light irradiation The charge transfer from ligand (chem. adsorbed SA) to metal (conduction band of TiO2) activates O2 to ROS, superoxide (O·-2). The pos. charge located at ligand SA is connected with (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO) catalysis for direct two-electron oxidation of amines and later regenerated by O·2-. SA and its derivatives were screened as ligands of TiO2 for the selective aerobic oxidation of amines into imines under blue light-emitting diode (LED) irradiation in which 5-CH3O-SA (5-methoxysalicylic acid, 0.8 mol%) complexed with anatase TiO2 and coupled with TEMPO (5 mol%) confers significantly better results than the others. By this visible light LMCT route, both primary amines and secondary amines can be selectively oxidized into corresponding imines with atm. O2 as the terminal oxidant. Importantly, the desired product of N-benzylidenebenzylamine can be isolated in 92% yield.

Applied Catalysis, B: Environmental published new progress about Amines Role: PEP (Physical, Engineering or Chemical Process), RCT (Reactant), PROC (Process), RACT (Reactant or Reagent). 3959-07-7 belongs to class bromides-buliding-blocks, and the molecular formula is C7H8BrN, Recommanded Product: 4-Bromobenzylamine.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Schmidt, Jurema; Rotter, Marco; Weiser, Tim; Wittmann, Sandra; Weizel, Lilia; Kaiser, Astrid; Heering, Jan; Goebel, Tamara; Angioni, Carlo; Wurglics, Mario; Paulke, Alexander; Geisslinger, Gerd; Kahnt, Astrid; Steinhilber, Dieter; Proschak, Ewgenij; Merk, Daniel published the artcile< A Dual Modulator of Farnesoid X Receptor and Soluble Epoxide Hydrolase To Counter Nonalcoholic Steatohepatitis>, COA of Formula: C9H8BrFO2, the main research area is benzylbenzamide dual modulator analog preparation nonalcoholic steatohepatitis; dual modulator analog FXR sEH benzylbenzamide analog pharmacokinetics.

Nonalcoholic steatohepatitis arising from Western diet and lifestyle is characterized by accumulation of fat in liver causing inflammation and fibrosis. It evolves as serious health burden with alarming incidence, but there is no satisfying pharmacol. therapy to date. Considering the disease’s multifactorial nature, modulation of multiple targets might provide superior therapeutic efficacy. In particular, farnesoid X receptor (FXR) activation that revealed antisteatotic and antifibrotic effects in clin. trials combined with inhibition of soluble epoxide hydrolase (sEH) as anti-inflammatory strategy promises synergies. To exploit this dual concept, we developed agents exerting partial FXR agonism and sEH inhibitory activity. Merging known pharmacophores and systematic exploration of the structure-activity relationship on both targets produced dual modulators with low nanomolar potency. Extensive in vitro characterization confirmed high dual efficacy in cellular context combined with low toxicity, and pilot in vivo data revealed favorable pharmacokinetics as well as engagement on both targets in vivo.

Journal of Medicinal Chemistry published new progress about Antifibrotic agents. 85070-57-1 belongs to class bromides-buliding-blocks, and the molecular formula is C9H8BrFO2, COA of Formula: C9H8BrFO2.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Aliboni, Eraldo published the artcile< Vitamin C in human saliva>, Related Products of 82-73-5, the main research area is .

By the method of Farmer and Abt (C.A. 30, 8273.5) the vitamin C content of human saliva (50 cases) was 12-50 (average 23) γ per 100 cc., no remarkable differences being found between men and women, or normal and pathol. subjects.

Clin. odontoiat. published new progress about Saliva. 82-73-5 belongs to class bromides-buliding-blocks, and the molecular formula is C8H3BrO3, Related Products of 82-73-5.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Baker, Sarah I.; Yaghoubi, Mahshid; Bidwell, Samantha L.; Pierce, Savannah L.; Hratchian, Hrant P.; Baxter, Ryan D. published the artcile< Enhanced Reactivity for Aromatic Bromination via Halogen Bonding with Lactic Acid Derivatives>, COA of Formula: C9H11Br, the main research area is arene bromination regioselective lactic acid bromosuccinimide.

Herein, a new method for regioselective aromatic bromination using lactic acid derivatives as halogen bond acceptors with N-bromosuccinimide (NBS) is reported. Several structural analogs of lactic acid affected the efficiency of aromatic brominations, presumably via Lewis acid/base halogen-bonding interactions. Rate comparisons of aromatic brominations demonstrated the reactivity enhancement available via catalytic additives capable of halogen bonding. Computational results demonstrated that Lewis basic additives interact with NBS to increase the electropos. character of bromine prior to electrophilic transfer. An optimized procedure using catalytic mandelic acid under aqueous conditions at room temperature has been developed to promote aromatic bromination on a variety of arene substrates with complete regioselectivity.

Journal of Organic Chemistry published new progress about Aryl bromides Role: SPN (Synthetic Preparation), PREP (Preparation). 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, COA of Formula: C9H11Br.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Schuisky, Peter; Federsel, Hans-Jurgen; Tian, Wei published the artcile< Regioisomerism in the Synthesis of a Chiral Aminotetralin Drug Compound: Unraveling Mechanistic Details and Diastereomer-Specific In-Depth NMR Investigations>, Recommanded Product: 2-(4-Bromo-3-methylphenyl)acetic acid, the main research area is regioisomerism synthesis chiral aminotetralin drug ARA2 unraveling mechanism.

During chem. process development of a novel 2-aminotetralin derivative(I) intended for use as an antidepressant, scrutiny of the byproduct present in the drug mol. revealed a set of regioisomers. Detailed studies showed that this impurity issue originated from an early synthetic step in which a brominated tetralone motif was generated in a ring-closing protocol. It was found that this reaction was accompanied by a migration of the aromatic bromo substituent via different bromonium species along two discrete pathways. This example of the halogen dance reaction resulted in the formation of a series of tetralone impurities with a bromine distributed across all available aromatic positions of the tetralin nucleus. Subsequently, when subjected to reductive amination conditions, each of these tetralones gave rise to pairs of aminotetralins in a diastereomeric relationship. NMR investigations revealed that the alicyclic portion of the compounds thus formed displayed very complex signal patterns, which required further in-depth studies using a variety of sophisticated techniques. As a result, a deep insight into the structural features of the current 2-aminotetralin family was obtained, which is emphasized by the definition of a novel “”0.2 ppm rule”” allowing the absolute configuration at tetralin C-2 to be determined

Journal of Organic Chemistry published new progress about Absolute configuration. 215949-57-8 belongs to class bromides-buliding-blocks, and the molecular formula is C9H9BrO2, Recommanded Product: 2-(4-Bromo-3-methylphenyl)acetic acid.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary