Tag: 200-300

Palladium-Catalyzed Phthalazinone Synthesis Using Paraformaldehyde as Carbon Source was written by Wang, Huamin;Cai, Jinhui;Huang, Huawen;Deng, Guo-Jun. And the article was included in Organic Letters in 2014.COA of Formula: C8H6BrFO2 This article mentions the following:

A palladium-catalyzed one-pot synthesis of phthalazinones I [ Ar = ph, 4-Me-ph, 4-Et-ph, 4-OMe-ph, etc.] from 2-halomethyl benzoates, paraformaldehyde, and aryl hydrazines is described. Various substituted phthalazinones were selectively obtained in good yields using paraformaldehyde as the cheap carbon source (CH). In the experiment, the researchers used many compounds, for example, Methyl 2-bromo-4-fluorobenzoate (cas: 653-92-9COA of Formula: C8H6BrFO2).

Methyl 2-bromo-4-fluorobenzoate (cas: 653-92-9) 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. 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.COA of Formula: C8H6BrFO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Conjugate Addition of Perfluoroarenes to α,β-Unsaturated Carbonyls Enabled by an Alkoxide-Hydrosilane System: Implication of a Radical Pathway was written by Xie, Weilong;Park, Sung-Woo;Jung, Hoimin;Kim, Dongwook;Baik, Mu-Hyun;Chang, Sukbok. And the article was included in Journal of the American Chemical Society in 2018.Recommanded Product: 57293-19-3 This article mentions the following:

Conjugate addition of organometallic reagents to α,β-unsaturated carbonyls is a key strategy for the construction of carbon-carbon bond in organic synthesis. Although direct C-H addition to unsaturated bonds via transition metal catalysis is explored in recent years, electron-deficient arenes that do not bear directing groups continue to be challenging. Herein we disclose the first example of a conjugate addition of perfluoroarenes to α,β-unsaturated carbonyls enabled by an alkoxide-hydrosilane system. The reaction is convenient to carry out at room temperature over a broad range of substrates and reactants to furnish synthetically versatile products in high to excellent yields. Mechanistic experiments in combination with computational studies suggest that a radical pathway is most likely operative in this transformation. The hypervalent silicate and silanide species, which are relevant to the proposed mechanism, were observed exptl. by NMR and single crystal X-ray diffraction analyses. In the experiment, the researchers used many compounds, for example, 1-(3-Bromopropyl)-4-methoxybenzene (cas: 57293-19-3Recommanded Product: 57293-19-3).

1-(3-Bromopropyl)-4-methoxybenzene (cas: 57293-19-3) belongs to organobromine compounds. Many of the organo bromine compounds are relatively nonpolar. Bromine is more electronegative than carbon (2.8 vs 2.5) and hence the carbon in a carbon–bromine bond is electrophilic in nature. The principal reactions for organobromides include dehydrobromination, Grignard reactions, reductive coupling, and nucleophilic substitution.Recommanded Product: 57293-19-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

An antimonene/Cp*Rh(phen)Cl/black phosphorus hybrid nanosheet-based Z-scheme artificial photosynthesis for enhanced photo/bio-catalytic CO₂ reduction was written by Ji, Xiaoyuan;Kang, Yong;Fan, Taojian;Xiong, Qingqing;Zhang, Songping;Tao, Wei;Zhang, Han. And the article was included in Journal of Materials Chemistry A: Materials for Energy and Sustainability in 2020.Quality Control of 2-Bromo-1,10-phenanthroline This article mentions the following:

Developing a biocatalyzed artificial photosynthesis system (APS) with a Z-scheme for CO₂ conversion has a promising outlook. However, it remains unexplored and challenging. Herein, we present an antimonene (AM) and black phosphorus (BP) hybrid nanosheet (HNSs) based Z-scheme APS for enhanced photo/bio-catalytic CO₂ reduction An “amphipathic” polymer PEI-PEG-C18 with a pos. charged PEI-head and hydrophobic C18-tail was synthesized and further modified with an electron mediator (M, Cp*Rh(phen)Cl). Using this PEI-PEG-C18-M as a “double-side tap”, AM/M/BP HNS-based Z-scheme photocatalytic systems were constructed through catenating AM NSs via a hydrophobic interaction with the hydrophobic C18-tail and subsequent BP NSs via electrostatic interactions with the pos. charged PEI-head. Thereafter, the biocatalytic system, including NAD(H)⁺ and redox enzymes, were sandwiched between the AM and BP layers through an electrostatic attraction with the amide groups in the “double-side tap”. Due to the high separation efficiency of the photogenerated electrons and holes and the improved reduction and oxidation potentials, the integrated Z-scheme APS shows excellent performance. In particular, although neither AM nor BP could catalyze NADH regeneration using H₂O as an electron donor under visible light, a 35 ± 4% regeneration of NADH and 160 ± 24μmol formic acid production were achieved by the AM/M/BP HNS-based Z-scheme APS. Moreover, the compatibility and omnipotence of the HNS-based APS for the synthesis of other high value-added products from CO₂ have been demonstrated through assembling the corresponding biocatalysts. In the experiment, the researchers used many compounds, for example, 2-Bromo-1,10-phenanthroline (cas: 22426-14-8Quality Control of 2-Bromo-1,10-phenanthroline).

2-Bromo-1,10-phenanthroline (cas: 22426-14-8) belongs to organobromine compounds. Bromine is more electronegative than carbon (2.9 vs 2.5). Consequently, the carbon in a carbon–bromine bond is electrophilic, i.e. alkyl bromides are alkylating agents. In the pharmaceutical industry organo bromine derivatives are used as sedatives, vasodilators, antiseptic agents, and anticancer agents.Quality Control of 2-Bromo-1,10-phenanthroline

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

A Study of Boronic Acid Based Fluorescent Glucose Sensors was written by Kawanishi, T.;Romey, M. A.;Zhu, P. C.;Holody, M. Z.;Shinkai, S.. And the article was included in Journal of Fluorescence in 2004.Electric Literature of C12H16BBrO2 This article mentions the following:

Boronic acid based anthracene dyes were designed, synthesized, and immobilized to solid phase, creating a continuous glucose sensor. Glucose sensitivities of dyes can decrease drastically after immobilization, therefore how to immobilize a dye to solid phase without changing the dye property is a key issue in developing the sensor. The glucose sensitivity of the simplest 1st generation sensor, which is based on an immobilized mono-phenylboronate/single-arm type, came short of the sensitivity requirement for practical use, because of the very moderate fluorescence intensity change over the physiol. glucose range. However, the 2nd generation, an immobilized bis-phenylboronate/double-arm type sensor, which contained two boronate groups in the dye moiety in expectation of a large intensity change, brought about considerable improvement on its glucose sensitivity. The authors tried to introduce functional groups onto an anthracene ring to improve the dyes’ fluorescence properties. Acetyl or carboxyl substitution on anthracene contributed to shift the fluorescence wavelength into the more visible range (red-shift) and a divergence of wavelength between an excitation peak and an emission peak. This improvement is advantageous to the design of an optical detection system. Furthermore, single arm immobilization to this carboxyl group, thus linking directly to the fluorophore led to a 3rd generation sensor, an immobilized bis-phenylboronate/single-arm type, that was twice as sensitive as that of the 2nd generation sensor, presumably due to increased mobility of the dye moiety. The results of the authors’ study advance closer toward a clin. useful continuous fluorescent glucose sensor. In the experiment, the researchers used many compounds, for example, 2-(2-(Bromomethyl)phenyl)-5,5-dimethyl-1,3,2-dioxaborinane (cas: 166821-88-1Electric Literature of C12H16BBrO2).

2-(2-(Bromomethyl)phenyl)-5,5-dimethyl-1,3,2-dioxaborinane (cas: 166821-88-1) belongs to organobromine compounds. Many of the organo bromine compounds are relatively nonpolar. Bromine is more electronegative than carbon (2.8 vs 2.5) and hence the carbon in a carbon–bromine bond is electrophilic in nature. Commercially available organobromine pharmaceuticals include the vasodilator nicergoline, the sedative brotizolam, the anticancer agent pipobroman, and the antiseptic merbromin. Electric Literature of C12H16BBrO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Reactions of organic anions. 114. Specific ortho orientation in the vicarious substitution of hydrogen in aromatic nitro compounds with carbanion of chloromethylphenyl sulfone was written by Makosza, M.;Glinka, T.;Kinowski, A.. And the article was included in Tetrahedron in 1984.SDS of cas: 76437-44-0 This article mentions the following:

Vicarious nucleophilic substitution of hydrogen atoms in nitroarenes with chloromethyl Ph sulfone proceeds selectively ortho to the nitro group when carried out in Me₃COK/THF base/solvent system. In the majority of 3-substituted nitrobenzene derivatives substitution occurs at the most hindered position 2. These conditions offer an efficient method of synthesis of 2,6 and 2,3-disubstituted nitrobenzene derivatives In the experiment, the researchers used many compounds, for example, 1-(Bromomethyl)-4-fluoro-2-nitrobenzene (cas: 76437-44-0SDS of cas: 76437-44-0).

1-(Bromomethyl)-4-fluoro-2-nitrobenzene (cas: 76437-44-0) belongs to organobromine compounds. Bromine is more electronegative than carbon (2.9 vs 2.5). Consequently, the carbon in a carbon–bromine bond is electrophilic, i.e. alkyl bromides are alkylating agents. The principal reactions for organobromides include dehydrobromination, Grignard reactions, reductive coupling, and nucleophilic substitution.SDS of cas: 76437-44-0

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Utilization of an Active Site Mutant Receptor for the Identification of Potent and Selective Atypical 5-HT_2C Receptor Agonists was written by Carpenter, Joseph;Wang, Ying;Wu, Gang;Feng, Jianxin;Ye, Xiang-Yang;Morales, Christian L.;Broekema, Matthias;Rossi, Karen A.;Miller, Keith J.;Murphy, Brian J.;Wu, Ginger;Malmstrom, Sarah E.;Azzara, Anthony V.;Sher, Philip M.;Fevig, John M.;Alt, Andrew;Bertekap, Robert L.;Cullen, Mary Jane;Harper, Timothy M.;Foster, Kimberly;Luk, Emily;Xiang, Qian;Grubb, Mary F.;Robl, Jeffrey A.;Wacker, Dean A.. And the article was included in Journal of Medicinal Chemistry in 2017.Formula: C7H8BrNO2 This article mentions the following:

Agonism of the 5-HT_2C receptor represents one of the most well-studied and clin. proven mechanisms for pharmacol. weight reduction Selectivity over the closely related 5-HT_2A and 5-HT_2B receptors is critical as their activation has been shown to lead to undesirable side effects and major safety concerns. In this communication, we report the development of a new screening paradigm that utilizes an active site mutant D134A (D3.32) 5-HT_2C receptor to identify atypical agonist structures. We addnl. report the discovery and optimization of a novel class of nonbasic heterocyclic amide agonists of 5-HT_2C. SAR investigations around the screening hits provided a diverse set of potent agonists at 5-HT_2C with high selectivity over the related 5-HT_2A and 5-HT_2B receptor subtypes. Further optimization through replacement of the amide with a variety of five- and six-membered heterocycles led to the identification of 6-(1-ethyl-3-(quinolin-8-yl)-1H-pyrazol-5-yl)pyridazin-3-amine (69). Oral administration of 69 to rats reduced food intake in an ad libitum feeding model, which could be completely reversed by a selective 5-HT_2C antagonist. In the experiment, the researchers used many compounds, for example, Methyl 4-bromo-1-methyl-1H-pyrrole-2-carboxylate (cas: 1196-90-3Formula: C7H8BrNO2).

Methyl 4-bromo-1-methyl-1H-pyrrole-2-carboxylate (cas: 1196-90-3) 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. Commercially available organobromine pharmaceuticals include the vasodilator nicergoline, the sedative brotizolam, the anticancer agent pipobroman, and the antiseptic merbromin. Formula: C7H8BrNO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Enantioselective Palladium-Catalyzed Intramolecular α-Arylative Desymmetrization of 1,3-Diketones was written by Zhu, Chendan;Wang, Dingyi;Zhao, Yue;Sun, Wei-Yin;Shi, Zhuangzhi. And the article was included in Journal of the American Chemical Society in 2017.Quality Control of 2-Bromo-4-fluorobenzylbromide This article mentions the following:

In the presence of Pd(OAc)₂ and a nonracemic diphenylphosphinoferrocenyloxazoline (FOXAP) (or its enantiomer), 2-bromoarylalkyl 1,3-cycloalkanediones such as I underwent enantioselective intramol. arylation and desymmetrization to yield nonracemic bridged benzo-fused bicycloalkanediones such as II in 35-99% yields and in 73-95% ee; a bromobenzyl phenylcyclohexanedione underwent cyclization to yield a bridged dione as a single diastereomer in 94% ee. Using this method, the sesquiterpene (-)-parvifoline was prepared in fourteen steps and 92% ee. In the experiment, the researchers used many compounds, for example, 2-Bromo-4-fluorobenzylbromide (cas: 61150-57-0Quality Control of 2-Bromo-4-fluorobenzylbromide).

2-Bromo-4-fluorobenzylbromide (cas: 61150-57-0) 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. The reactivity of organobromine compounds resembles but is intermediate between the reactivity of organochlorine and organoiodine compounds. For many applications, organobromides represent a compromise of reactivity and cost.Quality Control of 2-Bromo-4-fluorobenzylbromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Ferroelectric and Antiferroelectric Smectic and Columnar Liquid Crystalline Phases Formed by Silylated and Non-Silylated Molecules with Fluorinated Bent Cores was written by Keith, Christina;Dantlgraber, Gert;Reddy, R. Amaranatha;Baumeister, Ute;Tschierske, Carsten. And the article was included in Chemistry of Materials in 2007.Computed Properties of C8H7BrO2 This article mentions the following:

Novel liquid crystalline materials with fluorinated biphenyl-based bent aromatic cores were synthesized. The influence of F substitution at the aromatic core and the effects of combining oligosiloxane units and F substitution were studied. The mesophases were studied by polarizing microscopy, calorimetry, x-ray diffraction, and electrooptical studies. Different types of polar smectic and columnar phases were observed Depending on the position of the F substituents antiferroelec. and surface-stabilized ferroelec. switching subtypes of optically isotropic smectic phases composed of domains with opposite chirality sense (dark conglomerate phases) were obtained. All columnar phases represent ribbon phases with an oblique lattice. One type of columnar phase shows ferroelec. switching (Col_obP_FE), and the other shows antiferroelec. switching (Col_obP_A) which changes to a nonclassical antiferroelec. switching at reduced temperature During the switching process the mols. reorganize by rotation on a cone in the Col_obP_FE phase and by rotation around the mol. long axis in the antiferroelec. columnar phase. The switching around the long axis is of special interest as it changes the suprastructural chirality of the LC system. Development of phase structures and switching behavior is discussed with respect to the influences of internal and external interfaces. In the experiment, the researchers used many compounds, for example, 3-Bromophenyl acetate (cas: 35065-86-2Computed Properties of C8H7BrO2).

3-Bromophenyl acetate (cas: 35065-86-2) belongs to organobromine compounds. Many of the organo bromine compounds are relatively nonpolar. Bromine is more electronegative than carbon (2.8 vs 2.5) and hence the carbon in a carbon–bromine bond is electrophilic in nature. Commercially available organobromine pharmaceuticals include the vasodilator nicergoline, the sedative brotizolam, the anticancer agent pipobroman, and the antiseptic merbromin. Computed Properties of C8H7BrO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Synthesis of the biotinylated anti-HIV compound BMMP and the target identification study was written by Kamo, Masahiro;Tateishi, Hiroshi;Koga, Ryoko;Okamoto, Yoshinari;Otsuka, Masami;Fujita, Mikako. And the article was included in Bioorganic & Medicinal Chemistry Letters in 2016.Safety of N-(5-Bromopentyl)phthalimide This article mentions the following:

BMMP [2-(benzothiazol-2-ylmethylthio)-4-methylpyrimidine], an inhibitor of HIV-1 replication, was linked to biotin to study the interaction with the presumed target, HIV-1 Pr55^Gag or CA, by means of surface plasmon resonance. The synthesized biotin-BMMP inhibited HIV-1 replication to a similar extent as BMMP alone, but did not interact with Pr55^Gag or CA, suggesting that BMMP exerts its activity by a different mechanism. The synthesis of the target compound was achieved by a reaction of (3aS,4S,6aR)-hexahydro-2-oxo-1H-thieno[3,4-d]imidazole-4-pentanoic acid (biotin) with 2-[[(2-benzothiazolyl)methyl]thio]-4-pyrimidinehexanamine. The title compound thus formed was N-[[[[(benzothiazolyl)methyl]thio]pyrimidinyl]hexyl]biotinamide (biotin-BMMP). In the experiment, the researchers used many compounds, for example, N-(5-Bromopentyl)phthalimide (cas: 954-81-4Safety of N-(5-Bromopentyl)phthalimide).

N-(5-Bromopentyl)phthalimide (cas: 954-81-4) belongs to organobromine compounds. Bromo compounds are employed in a variety of metal-catalyzed coupling reactions. They are also ideal candidates for the synthesis of Grignard reagents that have wide-applicability in organic synthesis. In the pharmaceutical industry organo bromine derivatives are used as sedatives, vasodilators, antiseptic agents, and anticancer agents.Safety of N-(5-Bromopentyl)phthalimide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

One-Pot Base-Mediated Synthesis of Functionalized Aza-Fused Polycyclic Quinoline Derivatives was written by Jiang, Zeng-qiang;Miao, Da-zhuang;Tong, Yao;Pan, Qiang;Li, Xiao-tong;Hu, Ren-he;Han, Shi-qing. And the article was included in Synthesis in 2015.Electric Literature of C10H11BrO2 This article mentions the following:

A new one-pot protocol has been developed for a facile and efficient synthesis of aza-fused polycyclic quinolines (e.g., pyrrolo[1,2-a]quinoline derivatives) by a base-catalyzed reaction of 2-formylpyrrole with and (2-halophenyl)acetonitrile derivatives This reaction proceeded under transition metal-free conditions and showed high functional group tolerance, with the desired products being formed in good yield. Under optimized conditions the synthesis of the target compounds was achieved using phosphoric acid potassium salt (1:3) (potassium phosphate) and DMSO as reagent-solvent combination. Starting materials included 2-(bromo)benzeneacetonitrile, 2-(iodo)benzeneacetonitrile, 2-(chloro)benzeneacetonitrile, 2-(chloro)benzeneacetic acid ester as nitrile components. Aldehydes included 1H-pyrrole-2-carboxaldehyde, 1H-indole-2-carboxaldehyde derivatives, 1H-imidazole-2-carboxaldehyde derivatives The title compounds thus formed included pyrrolo[1,2-a]quinoline derivatives and imidazo[1,2-a]quinoline derivatives (nitriles, carboxylic acid esters). In the experiment, the researchers used many compounds, for example, Ethyl (2-bromophenyl)acetate (cas: 2178-24-7Electric Literature of C10H11BrO2).

Ethyl (2-bromophenyl)acetate (cas: 2178-24-7) 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. Bromine-containing agents predominate because not only are they more efficient than similar chlorine-containing species, but also the high atomic weight of bromine ensures that it is present in a high mass fraction within most organobromine compounds.Electric Literature of C10H11BrO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary