Tag: 100-200

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

《Wide thermal range, exclusive occurrence of technically significant chiral nematic phase: synthesis and mesomorphism of cholesterol-based non-symmetric dimers》 was published in Bulletin of Materials Science in 2020. These research results belong to Nayak, Rashmi Ashwathama; Bhat, Sachin A.; Rao, D. S. Shankar; Yelamaggad, C. V.. Quality Control of 4-Bromobutanoic acid The article mentions the following:

Fifteen new non-sym. chiral dimers belonging to three different series have been synthesized and evaluated for their mesomorphic properties. They were formed by interlinking cholesterol with salicylaldimine (SAN) cores (with reverse imine groups) via an ω-oxyalkanoyloxy spacer. Within a series, the length of the terminal n-alkoxy tails had been varied for a fixed even-parity spacer. Three even-parity spacers such as 4-oxybutanoyloxy, 6-oxyhexanoyloxy and 8-oxyoctanoyloxy have been used to join two cores, whereas the terminal tails such as n-butyloxy, n-hexyloxy, n-octyloxy, n-decyloxy and n-dodecyloxy chains have been attached to the SAN core. Microscopic and calorimetric exptl. results show that all the dimers behave identically exhibiting the chiral nematic (N*) phase solely, which was authenticated by powder X-ray diffraction studies carried out on some selected samples. In the vast majority of the cases,the phase was thermodynamically stable, and while cooling, it exists over a wide thermal range covering room temperature(RT)due to supercooling. Finding was notable given the fact that the N* phase possesses technol. significant optical properties. At RT, the N* phase displayed one of the iridescent colors characteristically caused by interference and diffraction of the reflected and scattered light. A comparative study reveals that the lengths of both the terminal chain and central spacer influence the clearing temperature of the dimers, and also the temperature range of the N* phase. The selective reflection measurements revealed that the pitch of the N* phase was either temperature sensitive or temperature insensitive. Temperature-dependent CD (CD) spectra were recorded for the planar texture of the N* phase formed by a dimer, as a representative case. The presence of an intense neg. CD band suggests the left-handed screw sense of the N* phase helix. In the experiment, the researchers used 4-Bromobutanoic acid(cas: 2623-87-2Quality Control of 4-Bromobutanoic acid)

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.).Quality Control of 4-Bromobutanoic acid

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Decarboxylative Bromination of Sterically Hindered Carboxylic Acids with Hypervalent Iodine(III) Reagents》 was published in Organic Process Research & Development in 2020. These research results belong to Watanabe, Ayumi; Koyamada, Kenta; Miyamoto, Kazunori; Kanazawa, Junichiro; Uchiyama, Masanobu. Electric Literature of C4H7Br The article mentions the following:

Sterically hindered three-dimensional (3D) alkyl halides are promising precursors for various reactions; however, they are difficult to synthesize via conventional reactions. Reported is an efficient and practical method for decarboxylative bromination of sterically hindered 3D aliphatic carboxylic acids using com. available (diacetoxyiodo)benzene and potassium bromide, one of the most stable and cheapest bromine sources in nature. The method features a metal-free/Br2-free system, mild reaction conditions, one-pot operation under air at room temperature, wide functional group compatibility, and gram-scale synthetic capability. This highly efficient reaction cleanly converts a broad range of carboxylic acids, the most inexpensive and readily available sources of highly strained/naturally occurring/drug-related scaffolds, into the corresponding alkyl bromides in good to high yields. In the part of experimental materials, we found many familiar compounds, such as (Bromomethyl)cyclopropane(cas: 7051-34-5Electric Literature of C4H7Br)

(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.Electric Literature of C4H7Br

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 《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

Quality Control of Ethyl 3-bromopropanoateIn 2021 ,《Discovery of a cryptic site at the interface 2 of TEAD – Towards a new family of YAP/TAZ-TEAD inhibitors》 appeared in European Journal of Medicinal Chemistry. The author of the article were Sturbaut, Manon; Bailly, Fabrice; Coevoet, Mathilde; Sileo, Pasquale; Pugniere, Martine; Liberelle, Maxime; Magnez, Romain; Thuru, Xavier; Chartier-Harlin, Marie-Christine; Melnyk, Patricia; Gelin, Muriel; Allemand, Frederic; Guichou, Jean-Francois; Cotelle, Philippe. The article conveys some information:

The Hippo pathway is involved in organ size control and tissue homeostasis by regulating cell growth, proliferation and apoptosis. It controls the phosphorylation of the transcription co-activator YAP (Yes associated protein) and TAZ (Transcriptional coactivator with PDZ-binding motif) in order to control their nuclear import and their interaction with TEAD (Transcriptional Enhanced Associated Domain). YAP, TAZ and TEADs are dysregulated in several cancers making YAP/TAZ-TEAD interaction a new emerging anti-cancer target. We report the synthesis of a set of trisubstituted pyrazoles which bind to hTEAD2 at the interface 2 revealing for the first time a cryptic pocket created by the movement of the phenol ring of Y382. Compound I disrupts YAP/TAZ-TEAD interaction in HEK293T cells and inhibits TEAD target genes and cell proliferation in MDA-MB-231 cells. Compound I is therefore the first inhibitor of YAP/TAZ-TEAD targeting interface 2. This mol. could serve with other pan-TEAD inhibitors such as interface 3 ligands, for the delineation of the relative importance of VGLL vs YAP/TAZ in a given cellular model. The results came from multiple reactions, including the reaction of Ethyl 3-bromopropanoate(cas: 539-74-2Quality Control of Ethyl 3-bromopropanoate)

Ethyl 3-bromopropanoate(cas: 539-74-2) belongs to organobromine compounds.Depending on the type of carbon to which the bromine is bonded, organic bromide could be alkyl, alkenyl, alkynyl, or aryl. Quality Control of Ethyl 3-bromopropanoate Due to the reactivity of bromide, they are used as potential precursors or important intermediates in organic synthesis.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Zhang, Dapeng; Atochina-Vasserman, Elena N.; Lu, Juncheng; Maurya, Devendra S.; Xiao, Qi; Liu, Matthew; Adamson, Jasper; Ona, Nathan; Reagan, Erin K.; Ni, Houping; Weissman, Drew; Percec, Virgil published an article in Journal of the American Chemical Society. The title of the article was 《The Unexpected Importance of the Primary Structure of the Hydrophobic Part of One-Component Ionizable Amphiphilic Janus Dendrimers in Targeted mRNA Delivery Activity》.Name: 4-Bromobutanoic acid The author mentioned the following in the article:

Viral and synthetic vectors for delivery of nucleic acids impacted genetic nanomedicine by aiding the rapid development of the extraordinarily efficient Covid-19 vaccines. Access to targeted delivery of nucleic acids is expected to expand the field of nanomedicine beyond most expectations. Both viral and synthetic vectors have advantages and disadvantages. The major advantage of the synthetic vectors is their unlimited synthetic capability. The four-component lipid nanoparticles (LNPs) are the leading nonviral vector for mRNA used by Pfizer and Moderna in Covid-19 vaccines. Their synthetic capacity inspired us to develop a one-component multifunctional sequence-defined ionizable amphiphilic Janus dendrimer (IAJD) delivery system for mRNA. The first experiments on IAJDs provided, through a rational-library design combined with orthogonal-modular accelerated synthesis and sequence control in their hydrophilic part, some of the most active synthetic vectors for the delivery of mRNA to lung. The second experiments employed a similar strategy, generating, by a less complex hydrophilic structure, a library of IAJDs targeting spleen, liver, and lung. Here, we report preliminary studies designing the hydrophobic region of IAJDs by using dissimilar alkyl lengths and demonstrate the unexpectedly important role of the primary structure of the hydrophobic part of IAJDs by increasing up to 90.2-fold the activity of targeted delivery of mRNA to spleen, lymph nodes, liver, and lung. The principles of the design strategy reported here and in previous publications indicate that IAJDs could have a profound impact on the future of genetic nanomedicine. After reading the article, we found that the author used 4-Bromobutanoic acid(cas: 2623-87-2Name: 4-Bromobutanoic acid)

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.).Name: 4-Bromobutanoic acid

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2022,Nozawa-Kumada, Kanako; Ono, Kanako; Kurosu, Satoshi; Shigeno, Masanori; Kondo, Yoshinori published an article in Organic & Biomolecular Chemistry. The title of the article was 《Copper-catalyzed aerobic benzylic C(sp3)-H lactonization of 2-alkylbenzamides via N-centered radicals》.Formula: C9H11Br The author mentioned the following in the article:

Copper-catalyzed aerobic C(sp3)-H functionalization of 2-alkylbenzamides for the synthesis of benzolactones were reported. This reaction proceeded via 1,5-hydrogen atom transfer of N-centered radicals directly generated by N-H bond cleavage and did not require the synthesis of pre-functionalized N-centered radical precursors or the use of strong stoichiometric oxidants. In the experiment, the researchers used many compounds, for example, 1-Bromo-2-isopropylbenzene(cas: 7073-94-1Formula: C9H11Br)

1-Bromo-2-isopropylbenzene(cas: 7073-94-1) belongs to organobromine compounds.Organobromine chemicals are produced naturally by an array of biological and other chemical processes in our environment. Some of these compounds are identical to man-made organobromine compounds, such as methyl bromide, bromoform, and bromophenols, but many others are entirely new moleclar entities, often possessing extraordinary and important biological properties. Formula: C9H11Br

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary