Month: November 2022

Harnden, M. R. published the artcileAn improved synthesis of the antiviral acyclonucleoside 9-(4-hydroxy-3-hydroxymethylbut-1-yl)guanine, Product Details of C8H15BrO2, the publication is Tetrahedron Letters (1985), 26(35), 4265-8, database is CAplus.

Alkylation of 2-amino-6-chloropurine with 5-(2-bromoethyl)-2,2-dimethyl-1,3-dioxane and subsequent acid hydrolysis provides an improved procedure for synthesis of the antiviral title acyclonucleoside I.

Tetrahedron Letters published new progress about 97845-58-4. 97845-58-4 belongs to bromides-buliding-blocks, auxiliary class Other Aliphatic Heterocyclic,Bromide, name is 5-(2-Bromoethyl)-2,2-dimethyl-1,3-dioxane, and the molecular formula is C8H15BrO2, Product Details of C8H15BrO2.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Karlsson, Lina E. published the artcilePolysulfone ionomers for proton-conducting fuel cell membranes: sulfoalkylated polysulfones, Synthetic Route of 55788-44-8, the publication is Journal of Membrane Science (2004), 230(1-2), 61-70, database is CAplus.

Polysulfones (PSUs) carrying short pendant alkyl side-chains with terminal sulfonic acid units were prepared and studied as proton-conducting membrane materials. The 1st step in the preparation involved quenching of lithiated PSU with SO₂ gas, resulting in sulfonated PSU. In the 2nd step, the lithium sulfonate units on the polymer were reacted with sodium 2-bromoethanesulfonate, sodium 3-bromopropanesulfonate, or 1,4-butane sultone to produce sulfoethylated, sulfopropylated, or sulfobutylated PSUs, resp. Anal. by TG showed that membranes based on the sulfoalkylated polymers were stable up to ∼300° under N₂ atmosphere. Calorimetry measurements revealed that the modified polymers absorbed large amounts of non-freezing water, corresponding to 11-14 mol H₂O/mol SO₃H under immersed conditions. The proton conductivity of a membrane based on a PSU carrying 0.9 sulfopropyl chains per repeating unit is 77 mS/cm at 70° under humidifying conditions.

Journal of Membrane Science published new progress about 55788-44-8. 55788-44-8 belongs to bromides-buliding-blocks, auxiliary class Bromide,Salt,Aliphatic hydrocarbon chain,Aliphatic hydrocarbon chain, name is Sodium 3-bromopropane-1-sulfonate, and the molecular formula is C3H6BrNaO3S, Synthetic Route of 55788-44-8.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Dimitrov, Ivaylo published the artcileSynthesis of polystyrene-based random copolymers with balanced number of basic or acidic functional groups, Computed Properties of 55788-44-8, the publication is Journal of Polymer Science, Part A: Polymer Chemistry (2010), 48(9), 2044-2052, database is CAplus.

Pairs of polystyrene-based random copolymers with balanced number of pendant basic or acidic groups were synthesized utilizing the template strategy. The same poly[(4-hydroxystyrene)-ran-styrene] was used as a template backbone for modification. Two different synthetic approaches for the functionalization were applied. The first one involved direct functionalization of the template backbone through alkylation of the phenolic groups with suitable reagents. The second modification approach was based on “click” chem., where the introduction of alkyne groups onto the template backbone was followed by copper-catalyzed 1,3 cycloaddition of aliphatic sulfonate- or amine-containing azides. Both synthetic approaches proved to be highly efficient as evidenced by ¹H-NMR analyses. The thermal properties were evaluated by differential scanning calorimetry and thermal gravimetric analyses and were influenced by the type of functionality and the modification method. The ether-linked functional copolymers were thermally more stable than their “clicked” analogs. © 2010 Wiley Periodicals, Inc. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 2044-2052, 2010.

Journal of Polymer Science, Part A: Polymer Chemistry published new progress about 55788-44-8. 55788-44-8 belongs to bromides-buliding-blocks, auxiliary class Bromide,Salt,Aliphatic hydrocarbon chain,Aliphatic hydrocarbon chain, name is Sodium 3-bromopropane-1-sulfonate, and the molecular formula is C3H6BrNaO3S, Computed Properties of 55788-44-8.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Park, Soyoon published the artcileAsymmetric dithieno[3,2-b:2′,3′-d]thiophene derivatives as solution-processable small molecular organic semiconductors for organic thin film transistors, Related Products of bromides-buliding-blocks, the publication is Thin Solid Films (2022), 139112, database is CAplus.

In this paper, solution-processable asym. dithieno[3,2-d:2′,3′-d]thiophene (DTT) compounds, 2-octyldithieno[3,2-b:2′,3′-d]thiophene (1), 2-octyl-6-(thiophen-2-yl)dithieno[3,2-b:2′,3′-d]thiophene (2), 2-octyl-6-(5-octylthiophen-2-yl)dithieno[3,2-b:2′,3′-d]thiophene (3), and 2-(5-(2-ethylhexyl)thiophen-2-yl)-6-octyldithieno[3,2-b:2′,3′-d]thiophene (4) were synthesized and employed as small mol. organic semiconductors for top-contact/bottom-gate organic thin-film transistors. Physicochem. properties of four compounds including decomposition temperature, melting temperature, maximum absorption wavelength, HOMO/lowest occupied MO energy level, and band gap were investigated. All DTT compounds exhibited p-channel activity, and especially compound 2 with addnl. thiophene group and linear alkyl chain (octyl group) showed superior elec. performance with hole mobility up to 0.07 cm²/Vs and current on/off ratio > 10⁸ in ambient environment. Moreover, film microstructure and morphol. showed correlation with the corresponding elec. performance, where high film texture and terrace-like morphol. afforded high device performance.

Thin Solid Films published new progress about 111-83-1. 111-83-1 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 1-Bromooctane, and the molecular formula is C8H17Br, Related Products of bromides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Cooper, Christopher R. published the artcileSelective D-glucosamine hydrochloride fluorescence signaling based on ammonium cation and diol recognition, SDS of cas: 166821-88-1, the publication is Chemical Communications (Cambridge) (1997), 1419-1420, database is CAplus.

Fluorescent photoinduced electron transfer sensor with monoaza-18-crown-6 ether and boronic acid receptor units shows selective fluorescent enhancement with D-glucosamine hydrochloride in aqueous solution at pH 7.18.

Chemical Communications (Cambridge) published new progress about 166821-88-1. 166821-88-1 belongs to bromides-buliding-blocks, auxiliary class Bromide,Boronic acid and ester,Benzyl bromide,Benzene,Boronic Acids,Boronic acid and ester, name is 2-(2-(Bromomethyl)phenyl)-5,5-dimethyl-1,3,2-dioxaborinane, and the molecular formula is C12H16BBrO2, SDS of cas: 166821-88-1.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Ziaee, Mehdi published the artcileInvestigation on aggregation behavior of 1-octyl-3-methylimidazolium bromide in water and in CuO-water nanofluids by measuring electrical conductivity and surface tension, SDS of cas: 111-83-1, the publication is Journal of the Iranian Chemical Society (2022), 19(5), 2053-2065, database is CAplus.

The physicochem. properties of aqueous ternary ionic liquid (IL) and nanoparticle systems are affected by the various intermol. interactions such as van der Waals, electrostatic and structural. Recently these systems have been considered both to increase the stability of nanofluids and to change the surface activity of the surface active ILs. A systematic exptl. study was conducted on aqueous solutions containing a surface active ionic liquid, 1-octyl-3-methylimidazolium bromide ([C8mim][Br]), in pure water and in CuO-water nanofluids to a better understanding of the aggregation behavior occurring in these systems. The elec. conductivity (κ) data were obtained for [C₈mim][Br] + water and [C8mim][Br] + CuO-water nanofluid (with 0.00066 wt%, 0.005 wt% and 0.01 wt% of CuO NPs) systems at 288.15, 293.15, 298.15 and 303.15 K. For these systems, surface tension (γ) measurements were taken at 298.15 K. The accurate anal. of the obtained data showed that the critical micelle concentration (cmc) for [C8mim][Br] in aqueous solution is increased with addition of CuO NPs to pure water, as well as with increasing concentration of CuO NPs in water-based fluid. The values of Gibbs energy, ΔG°mic, enthalpy, ΔH°mic, and entropy, ΔS°mic, of micellization were determined from the specific elec. conductivity data. The values of ΔG°mic were neg. and magnitude of ΔG°mic (kJ·mol-1) followed the order: 288.15 K (- 21.95) < 293.15 K (- 22.86) < 298.15 K (- 23.62) < 303.15 K (- 24.16). At the lower temperatures, the micellization of [C8mim][Br] in aqueous solutions is entropically driven process (ΔH°mic > 0) and with a temperature raise, this process becomes enthalpically driven process (ΔH°mic < 0). The presence of CuO NPs in aqueous medium reduces the surface activity of [C8mim][Br], so that, the cmc value is shifted to the higher concentrations of [C₈mim][Br]. Although the surface tension of the CuO-nanofluid is almost same as that of pure water, the interaction between [C8mim][Br] and CuO NPs surface leads to increasing of γ compared to the binary aqueous IL solutions This phenomenon revealed a decrease in some surface tension parameters like maximum surface excess concentration, Γ_max, adsorption efficiency, pC20, surface pressure at the saturated air/liquid interface, πcmc, and increase in the another parameters such as cmc, surface tension at the micellization, γcmc, and min. area per IL mol. at the surface, Amin, resp.

Journal of the Iranian Chemical Society published new progress about 111-83-1. 111-83-1 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 1-Bromooctane, and the molecular formula is C16H24BF4Ir, SDS of cas: 111-83-1.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Venugopalan, Vijay published the artcileInstabilities as the Origin of Large-Area Self-Assembled and Aligned Organic Semiconductor Nanocrystals, HPLC of Formula: 111-83-1, the publication is ACS Applied Electronic Materials (2022), 4(4), 1815-1822, database is CAplus.

Aligned nanocrystals of organic semiconductors (OSCs) are highly desirable for electronic devices and biomedical and photonic applications. Solution-based wet processing routes have the potential to produce aligned nanocrystals over large areas in small time frames. Herein, we demonstrate that by optimizing the hydrodynamic evaporative processes, controlled long-range crystalline assemblies of OSCs can be achieved (longest nanocrystal ~3 mm) purely through phys. processes: namely, from fingering instabilities. Self-assembly is achieved here without strong noncovalent interactions such as hydrogen-bonding interactions. Exptl. our approach involves just placing a drop of a solution on an inclined substrate. Nanocrystals with widths of 300-800 nm and lengths of millimeters (length/width aspect ratios >10⁵) are formed in less than 2-8 s. A hydrazine chemiresistive sensor based on the aligned crystalline patterns show unprecedented responsivity (~10^-6), 2 orders greater than those of stick-slip patterns. Finally, exptl. parameters that need optimization to achieve nanocrystal patterns are investigated in detail and pointers to fabricate such OSC nanocrystals are provided.

ACS Applied Electronic Materials published new progress about 111-83-1. 111-83-1 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 1-Bromooctane, and the molecular formula is C7H11N, HPLC of Formula: 111-83-1.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Wahid, Sana published the artcileBiology-oriented drug synthesis of nitrofurazone derivatives: Their α-glucosidase inhibitory activity and molecular docking studies, Recommanded Product: 1-Bromooctane, the publication is Arabian Journal of Chemistry (2022), 15(6), 103806, database is CAplus.

In the present study, twenty (20) structural variants of nitrofurazone were synthesized based on BIODS (Biol.-oriented drug synthesis) approach. The structure elucidation of the synthetic mols. (1-20) was carried out using different spectroscopic techniques, and their α-glucosidase inhibitory activity was also determined The synthetic mols. 1-20 exhibited good α-glucosidase inhibition than the parent, nitrofurazone. Four compounds 2, 4, 6, and 7 showed potential inhibition against α-glucosidase with IC₅₀ values ranging between 0.63 ± 0.25-1.29 ± 0.46 μM as compared to the standard acarbose (IC₅₀ = 2.05 ± 0.41 μM). Nevertheless, compounds 15 (IC₅₀ = 0.74 ± 0.12 μM), and 19 (IC₅₀ = 0.54 ± 0.3 μM) also displayed good α-glucosidase inhibition and compound 19 was the most active compound of the series. Kinetic study of the active compounds 7 and 19 was also carried out to confirm the mode of inhibition. The binding interactions of the most active compounds within the active site of enzyme were determined by mol. docking. Moreover, mol. dynamic simulation of compound 19 was also performed in order to determine the stability of the overall complex (α-glucosidase + c19) in an explicit watery environment. The synthetic mols. were predicted as non-cytotoxic, however, seven compounds 1, 3, 4, 9, 10, 11, and 12 were predicted as carcinogenic.

Arabian Journal of Chemistry published new progress about 111-83-1. 111-83-1 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 1-Bromooctane, and the molecular formula is C5H5BrN2, Recommanded Product: 1-Bromooctane.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Wilkinson, Andrew A. published the artcileSite-Selective and Rewritable Labeling of DNA through Enzymatic, Reversible, and Click Chemistries, Recommanded Product: 7-Bromohept-1-yne, the publication is ACS Central Science (2020), 6(4), 525-534, database is CAplus and MEDLINE.

Current methods for bioconjugation rely on the introduction of stable linkers that lack the required versatility to perform sequential functionalizations. However, sequential manipulations are an increasing requirement in chem. biol. because they can underpin multiple analyses of the same sample to provide a wider understanding of cell behavior. Here, we present a new method to site-selectively write, remove, and rewrite chem. functionality to a biomol., DNA in this case. Our method combines the precision and robustness of methyltransferase-directed labeling with the reversibility of acyl hydrazones and the efficiency of click chem. Underpinning the method is a new S-adenosyl-L-methionine derivative to site-selectively label DNA with a bifunctional chem. handle containing an acyl hydrazone-linker and a terminal azide. Functional tags are conjugated via the azide and can be removed (i.e., untagged) when needed at the acyl hydrazone via exchange with hydroxyl amine. The formed hydrazide-labeled DNA is a versatile intermediate that can be either rewritten to reset the original chem. handle or covalently reacted with a permanent tag. This ability to write, tag, untag, and permanently tag DNA is exploited to sequentially introduce two fluorescent dyes on DNA. Finally, we demonstrate the potential of the method by developing a protocol to sort labeled DNA using magnetic beads, with subsequent amplification of the sorted DNA sample for further anal. The presented method opens new avenues for site-selective bioconjugation and should underpin integrative approaches in chem. biol. where sequential functionalizations of the same sample are required. We present a method using MTases, acyl hydrazone, and click chem. to site-selectively tag, untag, and rewrite on DNA. Sequential labeling of DNA or sorting PCR DNA demonstrate its versatility.

ACS Central Science published new progress about 81216-14-0. 81216-14-0 belongs to bromides-buliding-blocks, auxiliary class Linker,PROTAC Linker, name is 7-Bromohept-1-yne, and the molecular formula is C15H14BNO4S, Recommanded Product: 7-Bromohept-1-yne.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Nechaev, Anton A. published the artcileSynthesis of fused 1,2-naphthoquinones with cytotoxic activity using a one-pot three-step reaction, Computed Properties of 89694-44-0, the publication is Organic & Biomolecular Chemistry (2021), 19(15), 3434-3440, database is CAplus and MEDLINE.

A method for the synthesis of fused 1,2-naphthoquinones, as analogs of biol. active natural terpene quinones, was described. The intermediate polycyclic naphthalenes were prepared by a one-pot palladium-catalyzed process from simple alkynes, one of which was made from an optically pure biomass-derived levoglucosenone. The prepared methoxy-substituted naphthalenes were subsequently transformed in one step to 1,2-naphthoquinones by a trivalent-iodine-mediated oxidation The naphthoquinone products were found to have cytotoxic properties.

Organic & Biomolecular Chemistry published new progress about 89694-44-0. 89694-44-0 belongs to bromides-buliding-blocks, auxiliary class Bromide,Boronic acid and ester,Benzene,Ether,Boronic Acids,Boronic acid and ester, name is 2-Bromo-5-methoxybenzene boronic acid, and the molecular formula is C7H8BBrO3, Computed Properties of 89694-44-0.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary