Category: bromides-buliding-blocks

《Asymmetric Total Synthesis of (+)-Waihoensene》 was published in Journal of the American Chemical Society in 2020. These research results belong to Qu, Yongzheng; Wang, Zheyuan; Zhang, Zhongchao; Zhang, Wendou; Huang, Jun; Yang, Zhen. Category: bromides-buliding-blocks The article mentions the following:

The asym. total synthesis of (+)-waihoensene (I), which has a cis-fused [6,5,5,5] tetracyclic core bearing an angular triquinane, a cis-fused six-membered ring, and four contiguous quaternary carbon atoms, was achieved through a sequence of chem. reactions in a stereochem. well-defined manner. The total synthesis features the following: (1) Cu-catalyzed asym. conjugated 1,4-addition; (2) diastereoselective Conia-ene type reaction; (3) diastereoselective intramol. Pauson-Khand reaction; (4) Ni-catalyzed diastereoselective conjugated 1,4-addition; and (5) radical-initiated intramol. hydrogen atom transfer (HAT). Control experiments and d. functional theory calculations support the proposed HAT process.Methyltriphenylphosphonium bromide(cas: 1779-49-3Category: bromides-buliding-blocks) was used in this study.

Methyltriphenylphosphonium bromide(cas: 1779-49-3) is used for methylenation through the Wittig reaction. It is utilized in the synthesis of an enyne and 9-isopropenyl -phenanthrene by using sodium amide as reagent. Category: bromides-buliding-blocks

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Scope, Kinetics, and Mechanism of “”On Water”” Cu Catalysis in the C-N Cross-Coupling Reactions of Indole Derivatives》 was published in European Journal of Organic Chemistry in 2020. These research results belong to Malavade, Vrunda; Patil, Manish; Patil, M.. Product Details of 6825-20-3 The article mentions the following:

In the presence of CuI and 1,10-phenanthroline, indoles and carbazoles underwent cross-coupling reactions with aryl iodides in (on) aqueous DME at 95° to yield N-aryl indoles and carbazoles. The reaction was accelerated significantly in aqueous DME over with DME or water alone. The kinetics and mechanism of the copper-catalyzed cross-coupling were studied; the mechanism, transition state structures and activation barriers, and effect of water on the oxidative addition and reductive elimination steps were studied using DFT calculations The water accelerated the cross-coupling rate acceleration by stabilizing the transition state of oxidative addition of iodobenzene to a copper phenanthroline complex (the rate-limiting step of reaction) through hydrogen bonding. The experimental part of the paper was very detailed, including the reaction process of 3,6-Dibromo-9H-carbazole(cas: 6825-20-3Product Details of 6825-20-3)

3,6-Dibromo-9H-carbazole(cas: 6825-20-3) is used as a reagent in the synthesis of P7C3-A20 which is a potent neuroprotective agent. And it has been used in the preparation of N-(2-hydroxyethyl)-3,6-dibromocarbazole.Product Details of 6825-20-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Identification of C10 nitrogen-containing aporphines with dopamine D1 versus D5 receptor selectivity》 was published in Bioorganic & Medicinal Chemistry Letters in 2020. These research results belong to Karki, Anupam; Juarez, Reecan; Namballa, Hari K.; Alberts, Ian; Harding, Wayne W.. Product Details of 7051-34-5 The article mentions the following:

New aporphines containing C10 nitrogen substituents (viz. nitro, aniline or amide moieties), were synthesized and evaluated for affinity at human serotonin 5-HT1A and 5-HT2A receptors and at human dopamine D1, D2 and D5 receptors. Two series of analogs were investigated: series A which contain a sole C10 nitrogen substituent on the tetracyclic aporphine core and series B which are 1,2,10-trisubstituted aporphines. Remarkably, compounds from both series lacked affinity for the D5 receptor, thus attaining D1 vs. D5 selectivity. Compound I was the most potent D1 ligand identified. Docking studies at D1 and D5 receptors indicate that the binding mode of I at the D1 receptor allows for stronger hydrophobic contacts, (primarily with Phe residues) as compared to the D5 receptor, accounting for its D1 vs. D5 selectivity. Considering the lack of affinity for the D5 receptor (and low affinity at other receptors tested), compound I represents an interesting starting point for further structural diversification of aporphines as sub-type selective D1 receptor tools. In addition to this study using (Bromomethyl)cyclopropane, there are many other studies that have used (Bromomethyl)cyclopropane(cas: 7051-34-5Product Details of 7051-34-5) was used in this study.

(Bromomethyl)cyclopropane(cas: 7051-34-5) is used as a synthetic building block for the introduction of the cyclopropylmethyl group. It was also used in the synthesis of 1,4-dienes via iron-catalyzed cross-coupling with alkenyl Grignard reagents.Product Details of 7051-34-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Visible-Light-Driven C4-Selective Alkylation of Pyridinium Derivatives with Alkyl Bromides》 was published in Journal of the American Chemical Society in 2020. These research results belong to Jung, Sungwoo; Shin, Sanghoon; Park, Seongjin; Hong, Sungwoo. Quality Control of (Bromomethyl)cyclopropane The article mentions the following:

Reported herein is a general strategy for the photochem. cross-coupling between N-amidopyridinium salts and various alkyl bromides under photocatalyst-free conditions, granting facile access to various C4-alkylated pyridines. This approach exploits the intriguing photochem. activity of electron donor-acceptor (EDA) complexes between N-amidopyridinium salts and bromide, which provides a photoactive handle capable of generating silyl radicals and driving the alkylation process. The robustness of this protocol was further demonstrated by the late-stage functionalization of complex compounds, e.g., dehydroepiandrosterone and oxaprozin, under mild and metal-free conditions. The experimental process involved the reaction of (Bromomethyl)cyclopropane(cas: 7051-34-5Quality Control of (Bromomethyl)cyclopropane)

(Bromomethyl)cyclopropane(cas: 7051-34-5) is used as a synthetic building block for the introduction of the cyclopropylmethyl group. It was also used in the synthesis of 1,4-dienes via iron-catalyzed cross-coupling with alkenyl Grignard reagents.Quality Control of (Bromomethyl)cyclopropane

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

The author of 《Hydrogen Bonding Phase-Transfer Catalysis with Potassium Fluoride: Enantioselective Synthesis of β-Fluoroamines》 were Pupo, Gabriele; Vicini, Anna Chiara; Ascough, David M. H.; Ibba, Francesco; Christensen, Kirsten E.; Thompson, Amber L.; Brown, John M.; Paton, Robert S.; Gouverneur, Veronique. And the article was published in Journal of the American Chemical Society in 2019. COA of Formula: C6H5Br2N The author mentioned the following in the article:

Potassium fluoride (KF) is an ideal reagent for fluorination because it is safe, easy to handle and low-cost. However, poor solubility in organic solvents coupled with limited strategies to control its reactivity has discouraged its use for asym. C-F bond formation. Here, we demonstrate that hydrogen bonding phase-transfer catalysis with KF provides access to valuable β-fluoroamines in high yields and enantioselectivities. This methodol. employs a chiral N-Et bis-urea catalyst that brings solid KF into solution as a tricoordinated urea-fluoride complex. This operationally simple reaction affords enantioenriched fluoro-diphenidine (up to 50 g scale) using 0.5 mol % of recoverable bis-urea catalyst.3,5-Dibromoaniline(cas: 626-40-4COA of Formula: C6H5Br2N) was used in this study.

3,5-Dibromoaniline(cas: 626-40-4) belongs to anime. Halogenation, in which one or more hydrogen atoms of an amine is replaced by a halogen atom, occurs with chlorine, bromine, and iodine, as well as with some other reagents, notably hypochlorous acid (HClO). With primary amines the reaction proceeds in two stages, producing N-chloro- and N,N-dichloro-amines, RNHCl and RNCl2, respectively. With tertiary amines, an alkyl group may be displaced by a halogen.COA of Formula: C6H5Br2N

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

The author of 《Acid-selective mass spectrometric analysis of petroleum fractions》 were Omari, Isaac; Zhu, Haoxuan; McGarvey, G. Bryce; McIndoe, J. Scott. And the article was published in International Journal of Mass Spectrometry in 2019. Electric Literature of C8H8Br2 The author mentioned the following in the article:

Naphthenic acids are cycloaliphatic carboxylic acids that are naturally-occurring constituents of petroleum. Anal. mass spectrometric methods aimed at carboxylic acids tend to involve deprotonation to generate carboxylate anions, but also produce detectable ions of every acidic component of the mixture A charged tag carbodiimide is able to facilitate detection of model naphthenic acids as well as low levels of naphthenic acids in petroleum fractions via tandem electrospray ionization mass spectrometry. This approach exhibits greater selectivity than deprotonation, and a picture of the acidic components of a petroleum fraction emerges after a quick derivatization step and without the use of chromatog. separation The method may prove useful in the context of characterizing the naphthenic acid components of complicated matrixes. In the experiment, the researchers used 1,4-Bis(bromomethyl)benzene(cas: 623-24-5Electric Literature of C8H8Br2)

1,4-Bis(bromomethyl)benzene(cas: 623-24-5) belongs to organobromine compounds. A variety of minor organobromine compounds are found in nature, but none are biosynthesized or required by mammals. Organobromine compounds have fallen under increased scrutiny for their environmental impact. Electric Literature of C8H8Br2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

The author of 《Copper-Catalyzed 1,2-Methoxy Methoxycarbonylation of Alkenes with Methyl Formate》 were Budai, Balazs; Leclair, Alexandre; Wang, Qian; Zhu, Jieping. And the article was published in Angewandte Chemie, International Edition in 2019. Formula: C19H18BrP The author mentioned the following in the article:

Reported here is a copper-catalyzed 1,2-methoxy methoxycarbonylation of alkenes by an unprecedented use of Me formate as a source of both the methoxy and the methoxycarbonyl groups. This reaction transforms styrene and its derivatives into value-added β-methoxy alkanoates and cinnamates, as well as medicinally important five-membered heterocycles, such as functionalized tetrahydrofurans, γ-lactones, and pyrrolidines. These findings suggest that pre-coordination of electron-rich alkenes to copper might play an important role in accelerating the addition of nucleophilic radicals to electron-rich alkenes, and could have general implications in the design of novel radical-based transformations.Methyltriphenylphosphonium bromide(cas: 1779-49-3Formula: C19H18BrP) was used in this study.

Methyltriphenylphosphonium bromide(cas: 1779-49-3) is a lipophilic molecule with a cation allowing for it to be used to deliver molecules to specific cell components. Also considered an antineoplastic agent.Formula: C19H18BrP

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

The author of 《A Novel Fluorescence Sensor Towards Hydrazine in Living Cells》 were Wang, Jinjin; Guo, Jing; Dou, Lili; Wang, Rui; Song, Yan; Yang, Qingbiao; Du, Jianshi; Li, Yaoxian. And the article was published in Chemical Research in Chinese Universities in 2019. Computed Properties of C4H7BrO2 The author mentioned the following in the article:

By a simple one-step reaction, a new fluorescein-based probe, 3′-hydroxy-3-oxo-3H-spiro[isobenzofu-ran-1,9′-xanthen]-6′-yl-4-bromobutanoate(FLB), was designed and synthesized. Relative to other cations, anions or amines, the probe exhibited high sensitivity and specificity towards hydrazine with approx. 40-fold fluorescence enhancement at 515 nm. The detection limit(DL) was calculated to be 2.87×10-8 mol/L, which was about 10 times lower than maximum allowable level of hydrazine(3.12×10-7 mol/L) in drinking water permitted by the US Environment and Protection Association(EPA). Simultaneously, through mass spectroscopy and proton NMR titration, the detection mechanism was further confirmed. Eventually, due to the low cytotoxicity and excellent water solubility, FLB could be employed to detect hydrazine in living cells. In the experiment, the researchers used 4-Bromobutanoic acid(cas: 2623-87-2Computed Properties of C4H7BrO2)

4-Bromobutanoic acid(cas: 2623-87-2) belongs to carboxylic acids. The chief chemical characteristic of the carboxylic acids is their acidity. They are generally more acidic than other organic compounds containing hydroxyl groups but are generally weaker than the familiar mineral acids (e.g., hydrochloric acid, HCl, sulfuric acid, H2SO4, etc.).Computed Properties of C4H7BrO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Recommanded Product: 1-Bromo-2-isopropylbenzeneIn 2017 ,《Ruthenium-Catalyzed Site-Selective Intramolecular Silylation of Primary C-H Bonds for Synthesis of Sila-Heterocycles》 was published in Journal of the American Chemical Society. The article was written by Fang, Huaquan; Hou, Wenjun; Liu, Guixia; Huang, Zheng. The article contains the following contents:

Incorporating the silicon element into bioactive organic mols. has received increasing attention in medicinal chem. Moreover, organosilanes are valuable synthetic intermediates for fine chems. and materials. Transition metal-catalyzed C-H silylation has become an important strategy for C-Si bond formations. However, despite the great advances in aromatic C(sp2)-H bond silylations, catalytic methods for aliphatic C(sp3)-H bond silylations are relatively rare. Here we report a pincer ruthenium catalyst for intramol. silylations of various primary C(sp3)-H bonds adjacent to heteroatoms (O, N, Si, Ge), including the first intramol. silylations of C-H bonds α to O, N, and Ge. This method provides a general, synthetically efficient approach to novel classes of Si-containing five-membered [1,3]-sila-heterocycles, including oxasilolanes, azasilolanes, disila-heterocycles, and germasilolane. The trend in the reactivity of five classes of C(sp3)-H bonds toward the Ru-catalyzed silylation is elucidated. Mechanistic studies indicate that the rate-determining step is the C-H bond cleavage involving a ruthenium silyl complex as the key intermediate, while a η2-silene ruthenium hydride species is determined to be an off-cycle intermediate. In addition to this study using 1-Bromo-2-isopropylbenzene, there are many other studies that have used 1-Bromo-2-isopropylbenzene(cas: 7073-94-1Recommanded Product: 1-Bromo-2-isopropylbenzene) was used in this study.

1-Bromo-2-isopropylbenzene(cas: 7073-94-1) belongs to organobromine compounds.Most of the natural organobromine compounds are produced by marine organisms , and several brominated metabolites with antibacterial , antitumor , antiviral , and antifungal activity have been isolated from seaweed, sponges, corals, molluscs, and others. Recommanded Product: 1-Bromo-2-isopropylbenzene Moreover, several studies demonstrate that the average proportion of bromine in drugs is significantly higher than that in natural products.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Recommanded Product: 14660-52-7In 2022 ,《Potent Inhibition of SARS-CoV-2 nsp14 N7-Methyltransferase by Sulfonamide-Based Bisubstrate Analogues》 was published in Journal of Medicinal Chemistry. The article was written by Ahmed-Belkacem, Rostom; Hausdorff, Marcel; Delpal, Adrien; Sutto-Ortiz, Priscila; Colmant, Agathe M. G.; Touret, Franck; Ogando, Natacha S.; Snijder, Eric J.; Canard, Bruno; Coutard, Bruno; Vasseur, Jean-Jacques; Decroly, Etienne; Debart, Francoise. The article contains the following contents:

Enzymes involved in RNA capping of SARS-CoV-2 are essential for the stability of viral RNA, translation of mRNAs, and virus evasion from innate immunity, making them attractive targets for antiviral agents. In this work, we focused on the design and synthesis of nucleoside-derived inhibitors against the SARS-CoV-2 nsp14 (N7-guanine)-methyltransferase (N7-MTase) that catalyzes the transfer of the Me group from the S-adenosyl-L-methionine (SAM) cofactor to the N7-guanosine cap. Seven compounds out of 39 SAM analogs showed remarkable double-digit nanomolar inhibitory activity against the N7-MTase nsp14. Mol. docking supported the structure-activity relationships of these inhibitors and a bisubstrate-based mechanism of action. The three most potent inhibitors significantly stabilized nsp14 (ΔTm ≈ 11°C), and the best inhibitor demonstrated high selectivity for nsp14 over human RNA N7-MTase. After reading the article, we found that the author used Ethyl 5-bromovalerate(cas: 14660-52-7Recommanded Product: 14660-52-7)

Ethyl 5-bromovalerate(cas: 14660-52-7) belongs to bromides. One prominent application of synthetic organobromine compounds is the use of polybrominated diphenyl ethers as fire-retardants, and in fact fire-retardant manufacture is currently the major industrial use of the element bromine.Recommanded Product: 14660-52-7

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary