Author: Jessica.F

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

Dumas, Stephane published the artcileHigh relaxivity magnetic resonance imaging contrast agents part 1: impact of single donor atom substitution on relaxivity of serum albumin-bound gadolinium complexes, Recommanded Product: Diethyl (bromomethyl)phosphonate, the publication is Investigative Radiology (2010), 45(10), 600-612, database is CAplus and MEDLINE.

Rationale and objectives: The donor atoms that bind to gadolinium in contrast agents influence inner-sphere water exchange and electronic relaxation, both of which determine observed relaxivity. The effect of these mol. parameters on relaxivity is greatest when the contrast agent is protein bound. We sought to determine an optimal donor atom set to yield high relaxivity compounds Methods: A total of 38 gadolinium-1,4,7,10-tetraazacyclo-dodecane-N,N’,N”,N”’-tetraacetato derivatives were prepared and relaxivity was determined in the presence and absence of human serum albumin as a function of temperature and magnetic field. Each compound had a common albumin-binding group and differed only by substitution of different donor groups at one of the macrocycle nitrogens. Oxygen-17 isotope relaxometry at 7.05 T was performed to estimate water exchange rates. Results: Changing a single donor atom resulted in changes in water exchange rates ranging across 3 orders of magnitude. Donor groups increased water exchange rate in the order: phosphonate ∼ phenolate > α-substituted acetate > acetate > hydroxamate ∼ sulfonamide > amide ∼ pyridyl ∼ imidazole. Relaxivites at 0.47 and 1.4 T, 37°C, ranged from 12.3 to 55.6 mMs and from 8.3 to 32.6 mMs resp. Optimal relaxivities were observed when the donor group was an α-substituted acetate. Electronic relaxation was slowest for the acetate derivatives as well. Conclusions: Water exchange dynamics and relaxivity can be predictably tuned by choice of donor atoms.

Investigative Radiology published new progress about 66197-72-6. 66197-72-6 belongs to bromides-buliding-blocks, auxiliary class Aliphatic Chain, name is Diethyl (bromomethyl)phosphonate, and the molecular formula is C5H12BrO3P, Recommanded Product: Diethyl (bromomethyl)phosphonate.

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

Marrero-Ponce, Yovani published the artcileLigand-Based Virtual Screening and in Silico Design of New Antimalarial Compounds Using Nonstochastic and Stochastic Total and Atom-Type Quadratic Maps, Recommanded Product: Dimidium bromide, the publication is Journal of Chemical Information and Modeling (2005), 45(4), 1082-1100, database is CAplus and MEDLINE.

Malaria has been one of the most significant public health problems for centuries. It affects many tropical and subtropical regions of the world. The increasing resistance of Plasmodium spp. to existing therapies has heightened alarms about malaria in the international health community. Nowadays, there is a pressing need for identifying and developing new drug-based antimalarial therapies. In an effort to overcome this problem, the main purpose of this study is to develop simple linear discriminant-based quant. structure-activity relation (QSAR) models for the classification and prediction of antimalarial activity using some of the TOMOCOMD-CARDD (TOpol. Mol. COMputer Design-Computer Aided “Rational” Drug Design) fingerprints, to enable computational screening from virtual combinatorial datasets. In this sense, a database of 1562 organic chems. having great structural variability, 597 of them antimalarial agents and 965 compounds having other clin. uses, was analyzed and presented as a helpful tool, not only for theor. chemists but also for other researchers in this area. This series of compounds was processed by a k-means cluster anal. to design training and predicting sets. Afterward, two linear classification functions were derived to discriminate between antimalarial and nonantimalarial compounds The models (including nonstochastic and stochastic indexes) correctly classify more than 93% of the compound set, in both training and external prediction datasets. They showed high Matthews’ correlation coefficients, 0.889 and 0.866 for the training set and 0.855 and 0.857 for the test one. The models’ predictivity was also assessed and validated by the random removal of 10% of the compounds to form a new test set, for which predictions were made using the models. The overall means of the correct classification for this process (leave group 10% full-out cross validation) using the equations with nonstochastic and stochastic atom-based quadratic fingerprints were 93.93% and 92.77%, resp. The quadratic maps-based TOMOCOMD-CARDD approach implemented in this work was successfully compared with four of the most useful models for antimalarials selection reported to date. The developed models were then used in a simulation of a virtual search for Ras FTase (FTase = farnesyltransferase) inhibitors with antimalarial activity; 70% and 100% of the 10 inhibitors used in this virtual search were correctly classified, showing the ability of the models to identify new lead antimalarials. Finally, these two QSAR models were used in the identification of previously unknown antimalarials. In this sense, three synthetic intermediaries of quinolinic compounds were evaluated as active/inactive ones using the developed models. The synthesis and biol. evaluation of these chems. against two malaria strains, using chloroquine as a reference, was performed. An accuracy of 100% with the theor. predictions was observed Compound 3 showed antimalarial activity, being the first report of an arylaminomethylenemalonate having such behavior. This result opens a door to a virtual study considering a higher variability of the structural core already evaluated, as well as of other chems. not included in this study. We conclude that the approach described here seems to be a promising QSAR tool for the mol. discovery of novel classes of antimalarial drugs, which may meet the dual challenges posed by drug-resistant parasites and the rapid progression of malaria illnesses.

Journal of Chemical Information and Modeling published new progress about 518-67-2. 518-67-2 belongs to bromides-buliding-blocks, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Benzene, name is Dimidium bromide, and the molecular formula is C20H18BrN3, Recommanded Product: Dimidium bromide.

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

Akther, Thamina published the artcileSynthesis and Structures of [2.n]Metacyclophan-1-enes and their Conversion to Highly Strained [2.n]Metacyclophane-1-ynes, COA of Formula: C10H16Br3N, the publication is European Journal of Organic Chemistry (2020), 2020(27), 4167-4175, database is CAplus.

The syntheses of syn-[2.n]metacyclophan-1-enes (n = 5, 6, 8) in good yields using the McMurry cyclization of 1,n-bis(3-formyl-4-methoxyphenyl)alkanes are reported. Conversion of syn-[2.6]- and [2.8]metacyclophan-1-enes to the corresponding highly strained syn-type [2.6]- and [2.8]metacyclophane-1-ynes was achieved by successive bromination and dehydrobromination reactions. An attempted trapping reaction of the putative corresponding [2.5]metacyclophane-1-yne by Diels-Alder reaction with 1,3-diphenylisobenzofuran failed due to its smaller ring size and strained structure. X-ray crystallog. analyses show that the triple bonds in syn-[2.6]- and [2.8]metacyclophane-1-ynes are distorted from linearity with bond angles of 156.7° and 161.4°, resp. A DFT (D. Functional Theory) computational study was conducted to determine the stabilities of different conformations of the target compounds

European Journal of Organic Chemistry published new progress about 111865-47-5. 111865-47-5 belongs to bromides-buliding-blocks, auxiliary class Benzenes, name is Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide, and the molecular formula is C10H16Br3N, COA of Formula: C10H16Br3N.

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

Murad, Ary R. published the artcileCharacteristics of low band gap copolymers containing anthracene-benzothiadiazole dicarboxylic imide: synthesis, optical, electrochemical, thermal and structural studies, HPLC of Formula: 52431-30-8, the publication is Polymers (Basel, Switzerland) (2021), 13(1), 62, database is CAplus and MEDLINE.

Two novel low band gap donor-acceptor (D-A) copolymers, poly[9,10-bis(4-(dodecyloxy)phenyl)-2,6-anthracene-alt-5,5-(4′,7′-bis(2-thienyl)-2′,1′,3′-benzothiadiazole-N-5,6-(3,7-dimethyloctyl)dicarboxylic imide)] (PPADTBTDI-DMO) and poly[9,10-bis(4-(dodecyloxy)phenyl)-2,6-anthracene-alt-5,5-(4′,7′-bis(2-thienyl)-2′,1′,3′-benzothiadiazole-5,6-N-octyl-dicarboxylic imide)] (PPADTBTDI-8) were synthesized in the present work by copolymerising the bis-boronate ester of 9,10-phenylsubstituted anthracene flanked by thienyl groups as electron-donor units with benzothiadiazole dicarboxylic imide (BTDI) as electron-acceptor units. Both polymers were synthesized in good yields via Suzuki polymerization Two different solubilizing alkyl chains were anchored to the BTDI units in order to investigate the impact upon their solubilities, mol. weights, optical and electrochem. properties, structural properties and thermal stability of the resulting polymers. Both polymers have comparable mol. weights and have a low optical band gap (Eg) of 1.66 eV. The polymers have low-lying HOMO (HOMO) levels of about -5.5 eV as well as the similar LUMO (LUMO) energy levels of -3.56 eV. Thermogravimetric analyses (TGA) of PPADTBTDI-DMO and PPADTBTDI-8 did not prove instability with decomposition temperatures at 354 and 313°C, resp. Powder X-ray diffraction (XRD) studies have shown that both polymers have an amorphous nature in the solid state, which could be used as electrolytes in optoelectronic devices.

Polymers (Basel, Switzerland) published new progress about 52431-30-8. 52431-30-8 belongs to bromides-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 2,5-Dibromo-3,4-dinitrothiophene, and the molecular formula is C4Br2N2O4S, HPLC of Formula: 52431-30-8.

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

Murad, Ary R. published the artcileFabrication of alternating copolymers based on cyclopentadithiophene-benzothiadiazole dicarboxylic imide with reduced optical band gap: synthesis, optical, electrochemical, thermal, and structural properties, Category: bromides-buliding-blocks, the publication is Polymers (Basel, Switzerland) (2021), 13(1), 63, database is CAplus and MEDLINE.

A series of alternating copolymers containing cyclopentadithiophene (CPDT) flanked by thienyl moieties as electron-donor units and benzothiadiazole dicarboxylic imide (BTDI) as electron-acceptor units were designed and synthesized for solar cell applications. Different solubilizing side chains, including 2-ethylhexyl chains and n-octyl chains were attached to CPDT units, whereas 3,7-dimethyloctyl chains and n-octyl chains were anchored to the BTDI moieties. The impact of these substituents on the solubilities, mol. weights, optical and electrochem. properties, and thermal and structural properties of the resulting polymers was investigated. PCPDTDTBTDI-EH, DMO was synthesized via Suzuki polymerization, whereas PCPDTDTBTDI-8, DMO, and PCPDTDTBTDI-EH, 8 were prepared through direct arylation polymerization PCPDTDTBTDI-8, DMO has the highest number average mol. weight (M_n = 17,400 g mol-1) among all polymers prepared The PCPDTDTBTDI-8, DMO and PCPDTDTBTDI-8, 8 which have n-octyl substituents on their CPDT units have comparable optical band gaps (E_g ∼ 1.3 eV), which are around 0.1 eV lower than PCPDTDTBTDI-EH, DMO analogs that have 2-ethylhexyl substituents on their CPDT units. The polymers have their HOMO levels between -5.10 and -5.22 eV with PCPDTDTBTDI-EH, DMO having the deepest HOMO (HOMO) energy level. The LUMO (LUMO) levels of the polymers are between -3.4 and -3.5 eV. All polymers exhibit good thermal stability with decomposition temperatures surpassing 350 °C. Powder X-ray diffraction (XRD) studies have shown that all polymers have the amorphous nature in solid state.

Polymers (Basel, Switzerland) published new progress about 52431-30-8. 52431-30-8 belongs to bromides-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 2,5-Dibromo-3,4-dinitrothiophene, and the molecular formula is C4Br2N2O4S, Category: bromides-buliding-blocks.

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

Murad, Ary R. published the artcileInfluence of fluorine substitution on the optical, thermal, electrochemical and structural properties of carbazole-benzothiadiazole dicarboxylic imide alternate copolymers, Name: 2,5-Dibromo-3,4-dinitrothiophene, the publication is Polymers (Basel, Switzerland) (2020), 12(12), 2910, database is CAplus and MEDLINE.

In this work four novel donor-acceptor copolymers, PCDTBTDI-DMO, PCDTBTDI-8, P2F-CDTBTDI-DMO and P2F-CDTBTDI-8, were designed and synthesized via Suzuki polymerization The first two copolymers consist of 2,7-carbazole flanked by thienyl moieties as the electron donor unit and benzothiadiazole dicarboxylic imide (BTDI) as electron acceptor units. In the structures of P2F-CDTBTDI-DMO and P2F-CDTBTDI-8 copolymers, two fluorine atoms were incorporated at 3,6-positions of 2,7-carbazole to investigate the impact of fluorine upon the optoelectronic, structural and thermal properties of the resulting polymers. P2F-CDTBTDI-8 possesses the highest number average mol. weight (Mn = 24,200 g mol-1) among all the polymers synthesized. PCDTBTDI-DMO and PCDTBTDI-8 show identical optical band gaps of 1.76 eV. However, the optical band gaps of fluorinated copolymers are slightly higher than non-fluorinated counterparts. All polymers have deep-lying HOMO (HOMO) levels. Changing the alkyl chain substituents on BTDI moieties from linear n-octyl to branched 3,7-dimethyloctyl groups as well as substituting the two hydrogen atoms at 3,6-positions of carbazole unit by fluorine atoms has negligible impact on the HOMO levels of the polymers. Similarly, the LUMO (LUMO) energy levels are almost comparable for all polymers. Thermogravimetric anal. (TGA) has shown that all polymers have good thermal stability and also confirmed that the fluorinated copolymers have higher thermal stability relative to those non-fluorinated analogs. Powder X-ray diffraction (XRD) studies proved that all polymers have an amorphous nature in the solid state.

Polymers (Basel, Switzerland) published new progress about 52431-30-8. 52431-30-8 belongs to bromides-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 2,5-Dibromo-3,4-dinitrothiophene, and the molecular formula is C4Br2N2O4S, Name: 2,5-Dibromo-3,4-dinitrothiophene.

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