Month: October 2022

Mansha, Muhammad; Ullah, Nisar; Kalgaonkar, Rajendra A.; Baqader, Nour published their research in Journal of Surfactants and Detergents in 2021. The article was titled 《Synthesis, Characterization, and Viscosification of Amidosulfobutaine and Zwitterionic Gemini Surfactants》.Electric Literature of C6H11BrO2 The article contains the following contents:

The viscoelastic surfactants (VES)-based acid diverters are frequently used to divert acid flow from high-permeability layers into low-permeability for enhanced overall productivity of the treated well. In general, an optimum VES-based system possesses advantages of decrease in absorption loss, damage of reservoir, and improved adaptability of active agents to high salinity. Herein, we report the synthesis of three new zwitterionic gemini surfactants (1-3) and previously known amidosulfobutaine (C18AMP3SB) has been accomplished for the investigation of diverting acid performance. The synthesis of these surfactants was achieved by the amidation of the acid chlorides of com. available fatty acids with 3-(dimethylamino)-1-propylamine followed by subsequent reactions with appropriate sultone or Et 4-bromobutanoate. The synthesized surfactants were well characterized by spectroscopic methods including IR and NMR spectroscopy. The thermogravimetric anal. (TGA) results suggested that surfactants (1-3) and C18AMP3SB possess excellent thermal stability, with no appreciable loss of mass up to 300°C. The viscosity measurements of the neat surfactants (1-3) and C18AMP3SB were performed under various temperatures, in the presence of different concentration of calcium chloride salt with the aid shear viscosimetry. The anal. revealed that the viscosity of neat C18AMP3SB increases with increase in concentration of CaCl2. In the experiment, the researchers used many compounds, for example, Ethyl 4-bromobutyrate(cas: 2969-81-5Electric Literature of C6H11BrO2)

Ethyl 4-bromobutyrate(cas: 2969-81-5) belongs to bromides. Most organobromine compounds, like most organohalide compounds, are relatively nonpolar. 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.Electric Literature of C6H11BrO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Pomogaeva, Anna V.; Timoshkin, Alexey Y. published their research in Journal of Computational Chemistry in 2021. The article was titled 《Influence of the solvent on the Lewis acidity of antimony pentahalides and group 13 Lewis acids toward acetonitrile and pyridine》.Related Products of 13465-09-3 The article contains the following contents:

Energetic effects of solvation of SbF5, SbCl5, and 21 group 13 Lewis acids (LA) and their mol. complexes with acetonitrile and pyridine are evaluated using SMD approach. Compared to the gas phase, solvation increases the stability of boron- and aluminum-containing complexes but decreases the stability of gallium and indium-containing homologs due to larger solvation energies of free LA. New Lewis acidity scales, based on the Gibbs energy of dissociation of the mol. complexes LA·pyridine and LA·acetonitrile in the gas phase, in benzene and acetonitrile solutions, are proposed. The experimental process involved the reaction of Indium(III) bromide(cas: 13465-09-3Related Products of 13465-09-3)

Indium(III) bromide(cas: 13465-09-3) is used in organic synthesis as a water tolerant Lewis acid. It efficiently catalyzes the three-component coupling of β-keto esters, aldehydes and urea (or thiourea) to afford the corresponding dihydropyrimidinones.Related Products of 13465-09-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Vang, Zoua Pa; Reyes, Albert; Sonstrom, Reilly E.; Holdren, Martin S.; Sloane, Samantha E.; Alansari, Isabella Y.; Neill, Justin L.; Pate, Brooks H.; Clark, Joseph R. published their research in Journal of the American Chemical Society in 2021. The article was titled 《Copper-Catalyzed Transfer Hydrodeuteration of Aryl Alkenes with Quantitative Isotopomer Purity Analysis by Molecular Rotational Resonance Spectroscopy》.Name: Ethyltriphenylphosphonium bromide The article contains the following contents:

A copper-catalyzed alkene transfer hydrodeuteration reaction that selectively incorporates one hydrogen and one deuterium atom across an aryl alkene was described. The transfer hydrodeuteration protocol was selective across a variety of internal and terminal alkenes and was also demonstrated on an alkene-containing complex natural product analog. Beyond using 1H, 2H, and 13C NMR anal. to measure reaction selectivity, six transfer hydrodeuteration products were analyzed by mol. rotational resonance (MRR) spectroscopy. The application of MRR spectroscopy to the anal. of isotopic impurities in deuteration chem. was further explored through a measurement methodol. that was compatible with high-throughput sample anal. In the first step, the MRR spectroscopy signatures of all isotopic variants accessible in the reaction chem. were analyzed using a broadband chirped-pulse Fourier transform microwave spectrometer. With the signatures in hand, measurement scripts were created to quant. analyze the sample composition using a com. cavity enhanced MRR spectrometer. The sample consumption was below 10 mg with anal. times on the order of 10 min using this instrument-both representing order-of-magnitude reduction compared to broadband MRR spectroscopy. To date, these measurements represent the most precise spectroscopic determination of selectivity in a transfer hydrodeuteration reaction and confirm that product regioselectivity ratios of >140:1 were achievable under this mild protocol. In the part of experimental materials, we found many familiar compounds, such as Ethyltriphenylphosphonium bromide(cas: 1530-32-1Name: Ethyltriphenylphosphonium bromide)

Ethyltriphenylphosphonium bromide(cas: 1530-32-1) is a phase transfer catalyst, used to accelerate the cure of phenolic-based epoxy resins, certain fluoroelastomer resins and thermosetting powder coatings. It is also used as catalysts in the synthesis of certain organic compounds and as a pharmaceutical intermediate.Name: Ethyltriphenylphosphonium bromide

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Zhao, Guofeng; Wu, Yi; Wu, Hai-Hong; Yang, Junfeng; Zhang, Junliang published their research in Journal of the American Chemical Society in 2021. The article was titled 《Pd/GF-Phos-Catalyzed Asymmetric Three-component Coupling Reaction to Access Chiral Diarylmethyl Alkynes》.Computed Properties of C9H11Br The article contains the following contents:

Herein, a Pd-catalyzed enantioselective three-component coupling of N-tosylhydrazone, aryl halide and terminal alkyne under mild conditions utilizing a novel chiral sulfinamide phosphine ligand (GF-Phos), which provided a facile access to chiral diarylmethyl alkynes, the useful synthons in organic synthesis as well as exists as skeleton in many bioactive mols. was reported. A pair of enantiomers of the product could be easily prepared using the same chiral ligand by simply changing the aryl substituents of the N-tosylhydrazone, aryl halide. The salient features of this reaction included the readily available starting materials, general substrate scope, high enantioselectivity, ease of scale up, mild reaction conditions and versatile transformations. After reading the article, we found that the author used 1-Bromo-2-isopropylbenzene(cas: 7073-94-1Computed Properties of C9H11Br)

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. Computed Properties of C9H11Br In contrast, terrestrial plants account only for a few bromine-containing compounds.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Upp, David M.; Huang, Rui; Li, Ying; Bultman, Max J.; Roux, Benoit; Lewis, Jared C. published their research in Angewandte Chemie, International Edition in 2021. The article was titled 《Engineering Dirhodium Artificial Metalloenzymes for Diazo Coupling Cascade Reactions》.Formula: C9H9BrO2 The article contains the following contents:

Artificial metalloenzymes (ArMs) are commonly used to control the stereoselectivity of catalytic reactions, but controlling chemoselectivity remains challenging. In this study, we engineer a dirhodium ArM to catalyze diazo cross-coupling to form an alkene that, in a one-pot cascade reaction, is reduced to an alkane with high enantioselectivity (typically >99% ee) by an alkene reductase. The numerous protein and small mol. components required for the cascade reaction had minimal effect on ArM catalysis. Directed evolution of the ArM led to improved yields and E/Z selectivities for a variety of substrates, which translated to cascade reaction yields. MD simulations of ArM variants were used to understand the structural role of the cofactor on ArM conformational dynamics. These results highlight the ability of ArMs to control both catalyst stereoselectivity and chemoselectivity to enable reactions in complex media that would otherwise lead to undesired side reactions. In the experimental materials used by the author, we found Benzyl 2-bromoacetate(cas: 5437-45-6Formula: C9H9BrO2)

Benzyl 2-bromoacetate(cas: 5437-45-6) belongs to benzyl acetate. Benzyl acetate is an aromatic chemical, usually appearing as a clear liquid with a moderate sweet-jasmine fragrance. This compound appears as a component of some of our fragrance blends.Formula: C9H9BrO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Merad, Jeremy; Grant, Phillip S.; Stopka, Tobias; Sabbatani, Juliette; Meyrelles, Ricardo; Preinfalk, Alexander; Matyasovsky, Jan; Maryasin, Boris; Gonzalez, Leticia; Maulide, Nuno published an article in 2022. The article was titled 《Direct stereodivergent olefination of carbonyl compounds with sulfur ylides》, and you may find the article in Journal of the American Chemical Society.Application of 5437-45-6 The information in the text is summarized as follows:

The reactivity of phosphorus and sulfur ylides towards carbonyl compounds constitutes a well-known dichotomy: the former gives olefins, while the latter gives epoxides. Herein, a stereodivergent carbonyl olefination which challenges this dichotomy, showcasing thiuronium ylides as valuable olefination reagents is presented. With this method, aldehydes are converted to Z-alkenes with high stereoselectivity and broad substrate scope, while N-tosylimines provide a similarly proficient entry to E-alkenes. In-depth computational and exptl. studies clarified the mechanistic details of this unusual reactivity. In addition to this study using Benzyl 2-bromoacetate, there are many other studies that have used Benzyl 2-bromoacetate(cas: 5437-45-6Application of 5437-45-6) was used in this study.

Benzyl 2-bromoacetate(cas: 5437-45-6) belongs to benzyl acetate. Benzyl acetate is a synthetic chemical produced for industry from benzyl alcohol and acetic acid, but is also naturally present in the essential oils of many plants, including jasmine and ylang ylang.Application of 5437-45-6

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Hosseinijei, Reyhaneh; Zahedian Tejeneki, Hossein; Nikbakht, Ali; Rominger, Frank; Balalaie, Saeed published an article in 2022. The article was titled 《Synthesis of functionalized 1-aminoisoquinolines through cascade three-component reaction of ortho-alkynylbenzaldoximes, 2H-azirines, and electrophiles》, and you may find the article in Organic & Biomolecular Chemistry.Synthetic Route of C7H5BrO The information in the text is summarized as follows:

A new three-component approach using ortho-alkynylbenzaldoximes involving the formation of a cyclic nitrone in the presence of Br2 or ICl for the synthesis of 1-aminoisoquinolines via cascade 6-endo-cyclization, 1,3-dipolar cycloaddition reaction with 2H-azirines, and ring-opening reaction sequences was reported. The broad range of structurally diverse products, good to high yields, high atom-economy and high bond-formation efficiency made this method an attractive alternative for the synthesis of 1-aminoisoquinolines.o-Bromobenzaldehyde(cas: 6630-33-7Synthetic Route of C7H5BrO) was used in this study.

o-Bromobenzaldehyde(cas: 6630-33-7) is used in L-threonine aldolase-catalyzed enantio/diastereoselective aldol reactions.Synthetic Route of C7H5BrOIt is a key starting material in the total synthesis of an anticancer agent, (-)-taxol.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Chen, Haifeng; Yue, Huifeng; Zhu, Chen; Rueping, Magnus published an article in 2022. The article was titled 《Reactivity in Nickel-Catalyzed Multi-component Sequential Reductive Cross-Coupling Reactions》, and you may find the article in Angewandte Chemie, International Edition.SDS of cas: 7051-34-5 The information in the text is summarized as follows:

The nickel-catalyzed three-component reductive carbonylation of alkyl halides, aryl halides, and Et chloroformate is described. Et chloroformate is utilized as a safe and readily available source of CO in this multi-component protocol, providing an efficient and practical alternative for the synthesis of aryl-alkyl ketones. The reaction exhibits a wide substrate scope and good functional group compatibility. Exptl. and DFT mechanistic studies highlight the complexity of the cross-electrophile coupling and provide insight into the sequence of the three consecutive oxidative additions of aryl halide, chloroformate, and alkyl halide.(Bromomethyl)cyclopropane(cas: 7051-34-5SDS of cas: 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.SDS of cas: 7051-34-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Yang, Ju-Song; Lu, Ka; Li, Chen-Xiao; Zhao, Zu-Hang; Zhang, Xiao-Ming; Zhang, Fu-Min; Tu, Yong-Qiang published an article in Angewandte Chemie, International Edition. The title of the article was 《Chiral 1,2,3-Triazolium Salt Catalyzed Asymmetric Mono- and Dialkylation of 2,5-Diketopiperazines with the Construction of Tetrasubstituted Carbon Centers》.SDS of cas: 5437-45-6 The author mentioned the following in the article:

Novel asym. mono- and dialkylation reactions of α-substituted 2,5-diketopiperazines catalyzed by new chiral spirocyclic-amide-derived triazolium organocatalysts was developed, resulting in a range of enantioenriched 2,5-diketopiperazine derivatives containing one or two tetrasubstituted carbon stereocenters. The reactions featured high yields (up to 98%) and excellent cis-diastereo- and enantioselectivities (up to >20:1 dr, >99% ee) and they provided a new asym. synthetic approach to important functionalized 2,5-diketopiperazine skeletons. Furthermore, a possible reaction mechanism was proposed based on both control experiments and extensive DFT calculations In addition to this study using Benzyl 2-bromoacetate, there are many other studies that have used Benzyl 2-bromoacetate(cas: 5437-45-6SDS of cas: 5437-45-6) was used in this study.

Benzyl 2-bromoacetate(cas: 5437-45-6) belongs to benzyl acetate. Benzyl acetate is an aromatic chemical, usually appearing as a clear liquid with a moderate sweet-jasmine fragrance. This compound appears as a component of some of our fragrance blends.SDS of cas: 5437-45-6

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Lamiable-Oulaidi, Farah; Harijan, Rajesh K.; Shaffer, Karl J.; Crump, Douglas R.; Sun, Yan; Du, Quan; Gulab, Shivali A.; Khan, Ashna A.; Luxenburger, Andreas; Woolhouse, Anthony D.; Sidoli, Simone; Tyler, Peter C.; Schramm, Vern L. published an article in Journal of Medicinal Chemistry. The title of the article was 《Synthesis and Characterization of Transition-State Analogue Inhibitors against Human DNA Methyltransferase 1》.Safety of Methyl 3-bromopropanoate The author mentioned the following in the article:

Hypermethylation of CpG regions by human DNA methyltransferase 1 (DNMT1) silences tumor-suppression genes, and inhibition of DNMT1 can reactivate silenced genes. The 5-azacytidines are approved inhibitors of DNMT1, but their mutagenic mechanism limits their utility. A synthon approach from the analogs of S-adenosylhomocysteine, methionine, and deoxycytidine recapitulated the chem. features of the DNMT1 transition state in the synthesis of 16 chem. stable transition-state mimics. Inhibitors causing both full and partial inhibition of purified DNMT1 were characterized. The inhibitors show modest selectivity for DNMT1 vs. DNMT3b. Active-site docking predicts inhibitor interactions with S-adenosyl-L-methionine and deoxycytidine regions of the catalytic site, validated by direct binding anal. Inhibitor action with purified DNMT1 is not reflected in cultured cells. A partial inhibitor activated cellular DNA methylation, and a full inhibitor had no effect on cellular DNA methylation. These compounds provide chem. access to a new family of noncovalent DNMT chem. scaffolds for use in DNA methyltransferases. In the experimental materials used by the author, we found Methyl 3-bromopropanoate(cas: 3395-91-3Safety of Methyl 3-bromopropanoate)

Methyl 3-bromopropanoate(cas: 3395-91-3) belongs to bromides. 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.Safety of Methyl 3-bromopropanoate

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary