Tag: 200-300

In 2022,Tavella, Christian; Luciano, Giorgio; Lova, Paola; Patrini, Maddalena; D’Arrigo, Cristina; Comoretto, Davide; Stagnaro, Paola published an article in RSC Advances. The title of the article was 《2,5-Diisopropenylthiophene by Suzuki-Miyaura cross-coupling reaction and its exploitation in inverse vulcanization: a case study》.Application of 3141-27-3 The author mentioned the following in the article:

A novel thiophene derivative, namely 2,5-diisopropenylthiophene (DIT) was synthesized by Suzuki-Miyaura cross-coupling reaction (SMCCR). The influence of reaction parameters, such as temperature, solvent, stoichiometry of reagents, role of the base and reaction medium were thoroughly discussed in view of yield optimization and environmental impact minimization. Basic design of experiment (DoE) and multiple linear regression (MLR) modeling methods were used to interpret the obtained results. DIT was employed as a comonomer in the copolymerization with waste elemental sulfur through a green process, inverse vulcanization (IV), to obtain sulfur-rich polymers named inverse vulcanized polymers (IVPs) possessing high refractive index (n 1̃.8). The DIT comonomer was purposely designed to (i) favor the IV process owing to the high reactivity of the isopropenyl functionalities and (ii) enhance the refractive index of the ensuing IVPs owing to the presence of the sulfur atom itself and to the high electronic polarizability of the π-conjugated thiophene ring. A series of random sulfur-r-diisopropenylthiophene (S-r-DIT) copolymers with sulfur content from 50-90 weight% were synthesized by varying the S/DIT feed ratio. Spectroscopic, thermal and optical characterizations of the new IVPs were carried out to assess their main chem.-phys. features. In addition to this study using 2,5-Dibromothiophene, there are many other studies that have used 2,5-Dibromothiophene(cas: 3141-27-3Application of 3141-27-3) was used in this study.

2,5-Dibromothiophene(cas: 3141-27-3) , is mainly used as pharmaceutical intermediate and synthesis intermediate. 2,5-Dibromothiophene may be used in the preparation of soluble α,ω-diformyl-a-oligothiophenes.Application of 3141-27-3

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Belitz, Florian; Seitz, Ann-Katrin; Goebel, Jonas F.; Hu, Zhiyong; Goossen, Lukas J. published an article in Organic Letters. The title of the article was 《Ru-Catalyzed C-H Arylation of Acrylic Acids with Aryl Bromides》.Formula: C7H5BrO2 The author mentioned the following in the article:

In the presence of a [Ru(p-cymene)Cl2]2/triethylphosphine/lithium carbonate catalyst system, aryl bromides underwent (Z)-selective couplings with unprotected 2-arylacrylic acids to form (Z)-1,2-diarylacrylic acids. This vinylic C-H functionalization proceeds in high yields of up to 94% and (Z/E)-ratios of up to 99:1, tolerating a wide range of functional groups. Mechanistic studies indicate that the vinylic C-H activation proceeds via base-assisted cyclometalation rather than via a Heck-type mechanism, which explains its orthogonal stereoselectivity.5-Bromobenzo[d][1,3]dioxole(cas: 2635-13-4Formula: C7H5BrO2) was used in this study.

Furthermore, the coupling of 5-Bromobenzo[d][1,3]dioxole(cas: 2635-13-4) with β-methallyl alcohol was catalyzed by Pd(OAc)2 in combination with P(t-Bu)3.Formula: C7H5BrO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Wang, Huai-Wei; Wu, Jia-Xue; Huang, Xian-Qiang; Li, Da-Cheng; Wang, Su-Na; Lu, Yi; Dou, Jian-Min published an article in 2022. The article was titled 《RhIII-Catalyzed C-H N-Heteroarylation and Esterification Cascade of Carboxylic Acid with Organoboron Reagents and 1,2-Dichloroethane in One-Pot Synthesis》, and you may find the article in Organic Letters.HPLC of Formula: 76006-33-2 The information in the text is summarized as follows:

A RhIII-catalyzed C(sp2)-H N-heteroarylation and esterification cascade of aryl carboxylic acids with N-heteroaromatic boronates and 1,2-dichloroethane in a one-pot synthesis has been disclosed. The strong coordinating ability of ortho- and meta-substituted pyridine boronates and pyrazoles as well as unsubstituted pyrimidine allows them to serve as the coupling partners. This protocol allows late-stage modification of the key precursor of roflumilast and compounds of pharmaceutical interest, which highlights the potential application of this synthetic method. The experimental part of the paper was very detailed, including the reaction process of 3-Bromo-2-methylbenzoic acid(cas: 76006-33-2HPLC of Formula: 76006-33-2)

3-Bromo-2-methylbenzoic acid(cas: 76006-33-2) belongs to organobromine compounds. A variety of minor organobromine compounds are found in nature, but none are biosynthesized or required by mammals. The most pervasive is the naturally produced bromomethane.HPLC of Formula: 76006-33-2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Uji, Hirotaka; Watabe, Naoki; Komi, Tatsuya; Sakaguchi, Tomoki; Akamatsu, Ryo; Mihara, Kenta; Kimura, Shunsaku published an article in 2022. The article was titled 《Downsizing to 25-nm Reverse Polymeric Micelle Composed of AB3-type Polydepsipeptide with Comprising siRNA》, and you may find the article in Chemistry Letters.Application of 5437-45-6 The information in the text is summarized as follows:

Amphiphilic block polydepsipeptides of AB-type and AB3-type (hydrophilic A block: poly(sarcosine), hydrophobic B block: poly(l-lactic acid)) were prepared, and the N-terminals were arranged by guanidium or guanidino-peptide nucleic acid for loading siRNA in a reverse polymeric micelle. The amphiphilic polymers were successfully dispersed and assembled into reverse micelles in triglyceride or diisopropyl adipate. With loading siRNA into the core of the polymeric micelles, the micelle size was reduced down to a diameter of 25 nm in the case of the guanidino-peptide nucleic acid used as the capturing site. This small-size reverse micelle may be available for a transdermal drug delivery system (DDS) for siRNA. In the experiment, the researchers used many compounds, for example, Benzyl 2-bromoacetate(cas: 5437-45-6Application of 5437-45-6)

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

Liu, Yong-Liang; Wang, Xiao-Ping; Li, Ya published an article in 2022. The article was titled 《Lewis Base-catalyzed β-Addition of (Arylsulfonyl) fluoromethane Derivatives to Allenoates》, and you may find the article in ChemistrySelect.Quality Control of Benzyl 2-bromoacetate The information in the text is summarized as follows:

A highly selective TMG-catalyzed β-addition of (arylsulfonyl)fluoromethane derivatives to allenoates has been developed. Cyano, nitro, and ester-functionalized (arylsulfonyl)fluoromethanes were all suitable substrates, giving a series of structurally diverse β-addition products bearing a stereogenic fluorinated carbon center. A possible reaction pathway was also presented. After reading the article, we found that the author used Benzyl 2-bromoacetate(cas: 5437-45-6Quality Control of Benzyl 2-bromoacetate)

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.Quality Control of Benzyl 2-bromoacetate

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Jiang, Huimin; Yan, Liting; Zhang, Shuo; Zhao, Yanchao; Yang, Xue; Wang, Yameng; Shen, Jianxing; Zhao, Xuebo; Wang, Lianzhou published an article in 2021. The article was titled 《Electrochemical surface restructuring of phosphorus-doped carbon@MoP electrocatalysts for hydrogen evolution》, and you may find the article in Nano-Micro Letters.SDS of cas: 623-24-5 The information in the text is summarized as follows:

The hydrogen evolution reaction (HER) through electrocatalysis is promising for the production of clean hydrogen fuel. However, designing the structure of catalysts, controlling their electronic properties, and manipulating their catalytic sites are a significant challenge in this field. Here, we propose an electrochem. surface restructuring strategy to design synergistically interactive phosphorus-doped carbon@MoP electrocatalysts for the HER. A simple electrochem. cycling method is developed to tune the thickness of the carbon layers that cover on MoP core, which significantly influences HER performance. Exptl. investigations and theor. calculations indicate that the inactive surface carbon layers can be removed through electrochem. cycling, leading to a close bond between the MoP and a few layers of coated graphene. The electrons donated by the MoP core enhance the adhesion and electronegativity of the carbon layers; the neg. charged carbon layers act as an active surface. The electrochem. induced optimization of the surface/interface electronic structures in the electrocatalysts significantly promotes the HER. Using this strategy endows the catalyst with excellent activity in terms of the HER in both acidic and alk. environments (c.d. of 10 mA cm-2 at low overpotentials, of 68 mV in 0.5 M H2SO4 and 67 mV in 1.0 M KOH). The experimental part of the paper was very detailed, including the reaction process of 1,4-Bis(bromomethyl)benzene(cas: 623-24-5SDS of cas: 623-24-5)

1,4-Bis(bromomethyl)benzene(cas: 623-24-5) belongs to organobromine compounds.Organobromine chemicals are produced naturally by an array of biological and other chemical processes in our environment. Organobromine compounds are produced naturally by marine creatures (sponges, corals, sea slugs, tunicates, sea fans) and seaweed, plants, fungi, lichen, algae, bacteria, microbes, and some mammals. SDS of cas: 623-24-5

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

The author of 《Magnetic Lignosulfonate-Supported Pd Complex: Renewable Resource-Derived Catalyst for Aqueous Suzuki-Miyaura Reaction》 were Nasrollahzadeh, Mahmoud; Issaabadi, Zahra; Varma, Rajender S.. And the article was published in ACS Omega in 2019. Electric Literature of C7H5BrO2 The author mentioned the following in the article:

A novel strategy is described to prepare magnetic Pd nanocatalyst by conjugating lignin with Fe3O4 nanoparticles via activation of calcium lignosulfonate, followed by combination with Fe3O4 nanoparticles. Tethering 5-amino-1H-tetrazole to calcium lignosulfonate-magnetite hybrid through 3-chloropropyl triethoxysilane enabled coordination of Pd salt with Fe3O4-lignosulfonate@5-amino-1H-tetrazole. The underlying changes of the lignosulfonate are identified, and the structural morphol. of attained Fe3O4-lignosulfonate@5-amino-1H-tetrazole-Pd(II) (FLA-Pd) is characterized by Fourier transform IR, thermogravimetry DTA, energy-dispersive spectrometry, field-emission SEM, transmission electron microscopy, and vibrating sample magnetometer (VSM). The synthesized FLA-Pd displayed high activity for phosphine-free C(sp2)-C(sp2) coupling in water, and the catalyst could be reused for seven successive cycles.4-Bromobenzoic acid(cas: 586-76-5Electric Literature of C7H5BrO2) was used in this study.

4-Bromobenzoic acid(cas: 586-76-5) has been used to study the metabolic fate of 2-,3-and 4-bromo benzoic acids in rat hepatocytes incubation using high temperature liquid chromatography. It was used in bromine-specific detection of the metabolites of 2-,3-and 4-bromobenzoic acid in the urine and bile of rats by inductively coupled plasma mass spectrometry.Electric Literature of C7H5BrO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

The author of 《Gemini surfactant as multifunctional corrosion and biocorrosion inhibitors for mild steel》 were Pakiet, Marta; Kowalczyk, Iwona; Leiva Garcia, Rafael; Moorcroft, Robert; Nichol, Tim; Smith, Thomas; Akid, Robert; Brycki, Bogumil. And the article was published in Bioelectrochemistry in 2019. Category: bromides-buliding-blocks The author mentioned the following in the article:

Biocorrosion is an important type of corrosion which leads to economic losses across oil and gas industries, due to increased monitoring, maintenance, and a reduction in platform availability. Ideally, a chem. compound engineered to mitigate against biocorrosion would possess both antimicrobial properties, as well as efficient corrosion inhibition. Gemini surfactants have shown efficacy in both of these properties, however there still remains a lack of electrochem. information regarding biocorrosion inhibition. The inhibition of corrosion and biocorrosion, by cationic gemini surfactants, of carbon steel was investigated. The results showed that the inhibition efficiency of the gemini surfactants was high (consistently >95%), even at low concentrations Gemini surfactants also showed strong antimicrobial activity, with a min. inhibitory concentration (0.018 mM). Corrosion inhibition was investigated by electrochem. impedance spectroscopy (EIS) and linear polarisation resistance (LPR), with biocorrosion experiments carried out in an anaerobic environment. Surface morphol. was analyzed using SEM (SEM). In the part of experimental materials, we found many familiar compounds, such as 1,6-Dibromohexane(cas: 629-03-8Category: bromides-buliding-blocks)

1,6-Dibromohexane(cas: 629-03-8) is generally used to introduce C6 spacer in the molecular architecture. Some of the examples are: synthesis of solvent processable and conductive polyfluorene ionomers for alkaline fuel cell applications; synthesis of cross-linkable regioregular poly(3-(5-hexenyl)thiophene) (P3HNT) for stabilizing the film morphology in polymer photovoltaic cells.Category: bromides-buliding-blocks

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

The author of 《Chemoselective formal β-functionalization of substituted aliphatic amides enabled by a facile stereoselective oxidation event》 were Bauer, Adriano; Maulide, Nuno. And the article was published in Chemical Science in 2019. Category: bromides-buliding-blocks The author mentioned the following in the article:

A facile and stereoselective dehydrogenation event enabling the functionalization of aliphatic amides, e.g., 1-(indolin-1-yl)-2-methylpropan-1-one at different positions in a one-pot fashion has been described. Derivatives of relevant pharmaceuticals were formally functionalized in the β-position in late-stage manner. A single-step synthesis of incrustoporine from a simple precursor further showcases the potential utility of this approach. The experimental part of the paper was very detailed, including the reaction process of Ethyl 5-bromovalerate(cas: 14660-52-7Category: bromides-buliding-blocks)

Ethyl 5-bromovalerate(cas: 14660-52-7) 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.Category: bromides-buliding-blocks

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2018,Yeap, Guan-Yeow; Ooi, Yew-Hong published 《λ-Shaped liquid crystal trimers with dual terminal cholesteryl moieties: synthesis and concomitant of N*, SmA and cholesteric glassy phases》.Liquid Crystals published the findings.Application In Synthesis of 8-Bromooctanoic acid The information in the text is summarized as follows:

Two homologous series of λ-shaped chiral liquid crystal trimers composed of a laterally substituted benzylidene-aniline as the central core armed by two cholesteryl ester moieties via odd-even alkyl spacer are synthesized (I; X = halo, Me, OH; n = 4-10). All the compounds are mesogenic exhibiting both chiral nematic (N*) and SmA phases except for trimers bearing long spacers (n = 9-10). A pronounced odd-even effect is observed on the phase transition temperatures and clearing enthalpies when the spacer length is varied in which the even-parity members show higher value. The widening of N* phase upon elongation of the alkyl spacer can be interpreted as a result of the destabilization of SmA phase. Full recrystallization from the cholesteric phase upon cooling is not observed for all the compounds bearing long spacer, especially oxydecanoyl spacer. Instead, the anisotropic fluid vitrified to form the cholesteric glassy state characteristic of polymer at low temperature This finding is also evident from the polarizing optical microscope whereby non-crystalline texture which resembles the Grandjean texture with various reflection colors is observed upon cooling to low temperature The effect of the lateral substituents on the liquid-crystalline behavior is also discussed. In the experiment, the researchers used 8-Bromooctanoic acid(cas: 17696-11-6Application In Synthesis of 8-Bromooctanoic acid)

8-Bromooctanoic acid(cas: 17696-11-6) acid is used in the synthesis of 8-(N-Methyl-4,4′-bipyridinyl)- octanoic acid. 8-Mercaptooctanoic acid was prepared from 8-bromooctanoic acid.Application In Synthesis of 8-Bromooctanoic acid

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary