Tag: 300-400

Synthesis of saturated fatty acids ¹¹C(¹³C)-labeled in the ω-methyl position was written by Neu, Henrik;Kihlberg, Tor;Laangstroem, Bengt. And the article was included in Journal of Labelled Compounds & Radiopharmaceuticals in 1997.Synthetic Route of C15H29BrO2 This article mentions the following:

A method for the preparation of ω-labeled saturated fatty acids ¹¹C(¹³C)H₃(CH₂)_nCO₂H (n = 1,2,3,,6,10,14) is described. A highly reactive zerovalent copper complex was prepared from lithium naphthalenide reduced lithium(2-thienyl)iodocuprate. The labeling precursors were obtained by addition of tert-Bu ω-iodocarboxylates to the organocuprate and these were reacted with [¹¹C]methyl iodide to form ¹¹C-labeled, protected intermediates. The tert-Bu ester protecting group was rapidly removed with trifluoroacetic acid, affording fatty acids ¹¹C-labeled in the ω-Me position. A solid phase extraction method was developed and preceded final HPLC purification In a typical run starting with 2.75 GBq of [¹¹C]methyl iodide, 375 MBq (66%) [16-¹¹C]palmitic acid was obtained within 46 min from the end of radionuclide production In the experiment, the researchers used many compounds, for example, 15-Bromopentadecanoic acid (cas: 56523-59-2Synthetic Route of C15H29BrO2).

15-Bromopentadecanoic acid (cas: 56523-59-2) 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. alpha-Bromoesters are employed in the Reformatsky reaction for the synthesis of beta-hydroxyesters. Commercially available organobromine pharmaceuticals include the vasodilator nicergoline, the sedative brotizolam, the anticancer agent pipobroman, and the antiseptic merbromin. Synthetic Route of C15H29BrO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Molecular diodes with rectification ratios exceeding 10⁵ driven by electrostatic interactions was written by Chen, Xiaoping;Roemer, Max;Yuan, Li;Du, Wei;Thompson, Damien;del Barco, Enrique;Nijhuis, Christian A.. And the article was included in Nature Nanotechnology in 2017.Reference of 56523-59-2 This article mentions the following:

Mol. diodes operating in the tunnelling regime are intrinsically limited to a maximum rectification ratio R of ∼10³. To enhance this rectification ratio to values comparable to those of conventional diodes (R ≥ 10⁵) an alternative mechanism of rectification is therefore required. Here, the authors report a mol. diode with R = 6.3 × 10⁵ based on self-assembled monolayers with Fc-C≃C-Fc (Fc, ferrocenyl) termini. The number of mols. (n(V)) involved in the charge transport changes with the polarity of the applied bias. More specifically, n(V) increases at forward bias because of an attractive electrostatic force between the pos. charged Fc units and the neg. charged top electrode, but remains constant at reverse bias when the Fc units are neutral and interact weakly with the pos. charged electrode. The authors successfully model this mechanism using mol. dynamics calculations In the experiment, the researchers used many compounds, for example, 15-Bromopentadecanoic acid (cas: 56523-59-2Reference of 56523-59-2).

15-Bromopentadecanoic acid (cas: 56523-59-2) 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. When the molecular ion is detected, the bromine and chlorine isotope patterns are very distinct, but caution is to be exercised for certain mixed chlorinated/brominated compounds, which can look similar to homohalogen patterns.Reference of 56523-59-2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Synthesis and Self-Assembly of Liquid Crystalline Triphenylenedicarboxythioimides was written by Psutka, Katie M.;Le Drew, Joshua;Taing, Hi;Eichhorn, S. Holger;Maly, Kenneth E.. And the article was included in Journal of Organic Chemistry in 2019.Recommanded Product: 859299-66-4 This article mentions the following:

We report the synthesis and properties of a series of novel triphenylenedicarboxyimides and thioimides (R = decyl) to probe the effect of thionation on the formation of columnar mesophases. These materials display broad columnar mesophases and high clearing points and self-associate in solution to form dimers. Overall, thionation improved the self-assembly in solution and led to a stabilization of the columnar mesophase. Furthermore, increasing the thionation of these materials led to a lowering of the LUMO energy level and a narrowing of the HOMO-LUMO gap. In the experiment, the researchers used many compounds, for example, Dimethyl 4,5-dibromophthalate (cas: 859299-66-4Recommanded Product: 859299-66-4).

Dimethyl 4,5-dibromophthalate (cas: 859299-66-4) belongs to organobromine compounds. Organo bromine compounds are versatile compounds and are widely used in diverse fields. Organo bromine derivatives are used in the dye sector, as an indicator in analytical chemistry (Bromothymol blue is a popular indicator). The principal reactions for organobromides include dehydrobromination, Grignard reactions, reductive coupling, and nucleophilic substitution.Recommanded Product: 859299-66-4

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Synthesis of ω-hydroxy quaternary ammonium bolaform surfactants was written by Davey, Tim W.;Hayman, Alan R.. And the article was included in Australian Journal of Chemistry in 1998.Application of 56523-59-2 This article mentions the following:

Several members of a novel class of ω-substituted asym. bolaform surfactants were synthesized to investigate their surfactant and biol. properties. The ω-hydroxy trialkylammonium and pyridinium surfactants have significant antimicrobial and antifungal activity relative to their conventional analogs. For conventional quaternary ammonium alkyl surfactants, increasing the hydrocarbon chain length causes a decrease in the surfactant monomer solubility and a corresponding decrease in the biol. activity. No such trend is observed for the ω-hydroxy quaternary ammonium bromide series. In the experiment, the researchers used many compounds, for example, 15-Bromopentadecanoic acid (cas: 56523-59-2Application of 56523-59-2).

15-Bromopentadecanoic acid (cas: 56523-59-2) 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. Commercially available organobromine pharmaceuticals include the vasodilator nicergoline, the sedative brotizolam, the anticancer agent pipobroman, and the antiseptic merbromin. Application of 56523-59-2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Macrocyclic musk compounds: Synthetic approaches to key intermediates for exaltolide, exaltone and dilactones was written by Ravi, S.;Padmanabhan, D.;Mamdapur, V. R.. And the article was included in Journal of the Indian Institute of Science in 2001.Product Details of 56523-59-2 This article mentions the following:

Facile syntheses to key intermediates 15-bromopentadecanoic acid and Me 15-hydroxypentadecanoate (for exaltolide), di-Me pentadecanedioate (for exaltone) and tridecanedioic acid and undecanedioic acid (for ethylene brassylate and cyclic ethylene undecanedioate), resp., was achieved from easily accessible aleuritic acid and 10-undecenoic acid. In the experiment, the researchers used many compounds, for example, 15-Bromopentadecanoic acid (cas: 56523-59-2Product Details of 56523-59-2).

15-Bromopentadecanoic acid (cas: 56523-59-2) 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. 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.Product Details of 56523-59-2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Fatty acid and phytoplankton compositions of different types of mucilaginous aggregates in the northern Adriatic was written by Najdek, Mirjana;Debobbis, Danilo;Miokovic, Danijela;Ivancic, Ingrid. And the article was included in Journal of Plankton Research in 2002.Reference of 56523-59-2 This article mentions the following:

The biomarkers (fatty acid proportions and ratios characteristic of phytoplankton and bacteria) and phytoplankton species in small (0.5-2.0 cm) and large (0.5-5 m) marine aggregates were determined in samples from the northern Adriatic Sea, during a mucilage event in 1997, as well as in 1993, 1994 and 1998, when events were not observed Types of aggregates were identified according to various biomarker relations, particularly those related to bacterial and phytoplankton activities and changes in the diatom species composition Aged mucilaginous aggregates (summer 1997) showed fatty acid proportions (16P/18P, 3.9-7.7) characteristic of the highest phytoplankton activities, and also showed the highest bacterial fatty acid proportions (13.3-17.1%) and ratios (C15:br/C15:0, 4.4-6.0). They showed an different diatom community (dominated by Cylindrotheca closterium) from that in surrounding waters. These characteristics suggest a continuous renewal of the aggregate organic matter, supporting the hypothesis that aggregate is a self-sustaining community. In contrast, both freshly formed marine snow, dominant during periods without mucilage events, and freshly formed mucilaginous aggregates presented biomarker proportions and ratios similar to those of suspended matter (bacterial fatty acids 3-6.7%, C15:br/C15:0 1.2-4.6, 16P/18P 0.4-4.0), and diatom composition similar to that of the ambient water. This indicates that marine snow sinks more rapidly than large aggregates, before significant changes can occur in its plankton composition Other aging aggregate types showed intermediate characteristics, suggesting that their residence times in the water column were still sufficient to develop organic production-decomposition cycles that modified to various extents their biochem. composition In the experiment, the researchers used many compounds, for example, 15-Bromopentadecanoic acid (cas: 56523-59-2Reference of 56523-59-2).

15-Bromopentadecanoic acid (cas: 56523-59-2) 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. The principal reactions for organobromides include dehydrobromination, Grignard reactions, reductive coupling, and nucleophilic substitution.Reference of 56523-59-2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Acidic products of reaction of isoöctane with nitric acid was written by Nametkin, S. S.;Zabrodina, K. S.. And the article was included in Doklady Akademii Nauk SSSR in 1951.Recommanded Product: 56523-59-2 This article mentions the following:

Fractional steam distillation used as the basis for the separation of the acidic products of the reaction of isoöctane with HNO₃ (d. 1.075) showed the presence of: AcOH, iso-PrCO₂H, Me₃CCO₂H (p-phenylphenacyl ester, m. 112.8-13.0°), tert-BuCH₂CO₂H, α,α-dimethylsuccinic acid, and traces of (CO₂H)₂. In the experiment, the researchers used many compounds, for example, 15-Bromopentadecanoic acid (cas: 56523-59-2Recommanded Product: 56523-59-2).

15-Bromopentadecanoic acid (cas: 56523-59-2) 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. 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.Recommanded Product: 56523-59-2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Octathienyl/phenyl-substituted zinc phthalocyanines J-aggregated through conformational planarization was written by Chen, Zihui;Niu, Lihong;Cheng, Yuanhua;Zhou, Xinyu;Zhong, Cheng;Zhang, Fushi. And the article was included in Dalton Transactions in 2011.Synthetic Route of C10H8Br2O4 This article mentions the following:

A novel family of thiophene-decorated phthalocyanines (M-TPcs) was efficiently synthesized, during which the key intermediate of these compounds was purified through a chem. approach. In the optimized geometries of M-TPcs, the peripherally linked thiophene rings are tilted from the Pc core, which oppose aggregation considering the mutual steric hindrance. However, Zn-TPc formed J-aggregates in many solvents while Ni-TPc and Cu-TPc did not. Octaphenyl-substituted Zn Pc (Zn-PPc) showed similar J-aggregation behavior as Zn-TPc. This unusual J-aggregation was attributed to the conformational planarization of the corresponding mols. In the experiment, the researchers used many compounds, for example, Dimethyl 4,5-dibromophthalate (cas: 859299-66-4Synthetic Route of C10H8Br2O4).

Dimethyl 4,5-dibromophthalate (cas: 859299-66-4) 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. alpha-Bromoesters are employed in the Reformatsky reaction for the synthesis of beta-hydroxyesters. 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.Synthetic Route of C10H8Br2O4

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Stoichiometric Self-Assembly of Isomeric, Shape-Persistent, Supramacromolecular Bowtie and Butterfly Structures was written by Schultz, Anthony;Li, Xiaopeng;Barkakaty, Balaka;Moorefield, Charles N.;Wesdemiotis, Chrys;Newkome, George R.. And the article was included in Journal of the American Chemical Society in 2012.Synthetic Route of C10H8Br2O4 This article mentions the following:

Two novel macromol. constitutional isomers have been self-assembled from previously unreported terpyridine ligands in a three-component system. The terpyridine ligands were synthesized in high yields via a key Suzuki coupling. Restrictions of the possible outcomes for self-assembly ultimately provided optimum conditions for isolation of either a mol. bowtie or its isomeric butterfly motif. These isomers have been characterized by ESI-MS, TWIM-MS, ¹H NMR, and ¹³C NMR. Notably, these structural isomers have remarkably different drift times in ion mobility separation, corresponding to different sizes and shapes at high charge states. In the experiment, the researchers used many compounds, for example, Dimethyl 4,5-dibromophthalate (cas: 859299-66-4Synthetic Route of C10H8Br2O4).

Dimethyl 4,5-dibromophthalate (cas: 859299-66-4) belongs to organobromine compounds. Organo bromine compounds are versatile compounds and are widely used in diverse fields. Organo bromine derivatives are used in the dye sector, as an indicator in analytical chemistry (Bromothymol blue is a popular indicator). 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.Synthetic Route of C10H8Br2O4

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

New indolium and quinolinium dyes sensitive to aqueous halide ions at physiological concentrations was written by Geddes, Chris. D.;Douglas, Peter;Moore, Christopher P.;Wear, Trevor J.;Egerton, Peter L.. And the article was included in Journal of Heterocyclic Chemistry in 1999.Computed Properties of C15H29BrO2 This article mentions the following:

New highly fluorescent dyes have been produced by the reaction of two heterocyclic nitrogen bases (6-methoxyquinoline and harmane) with 8-bromooctanoic acid, 11-bromoundecanoic acid, and 15-bromopentadecanoic acid. The bromide counter ions of the first six dyes were also replaced with the tetraphenylborate ion. Unlike the bases themselves, the quaternary salts are water soluble and have fluorescence characteristics independent of pH in the pH range 7-11. Both the fluorescence intensity and fluorescence lifetime of the 12 dyes are reduced in the presence of aqueous halide ions allowing halide concentrations to be determined accurately at physiol. levels. All the dyes have been characterized in terms of steady state fluorescence spectra and steady-state Stern-Volmer anal. In the experiment, the researchers used many compounds, for example, 15-Bromopentadecanoic acid (cas: 56523-59-2Computed Properties of C15H29BrO2).

15-Bromopentadecanoic acid (cas: 56523-59-2) 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. alpha-Bromoesters are employed in the Reformatsky reaction for the synthesis of beta-hydroxyesters. 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.Computed Properties of C15H29BrO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary