Tag: M.W=300-350

Kollapudi, Chandra Babu published the artcileGreen methodologies in organic synthesis: microwave-assisted study on carbostyril derivatives under phase transfer catalysis, Name: N-Benzyl-N,N-dibutylbutan-1-aminium chloride, the publication is Heterocyclic Letters (2015), 5(2), 213-221, database is CAplus.

In this paper few carbostyril derivatives were synthesized by microwave method as well as by green chem. method. By applying the green synthesis method, not only avoided the use of DDQ and benzyl halide which is hazardous but also the formation of by products. The quaternary ammonium salts (PTC) under microwave conditions towards Aripiprazole (carbostyril derivative) act as a reagent and gave dehydrogenated and benzylated carbostyril from 3,4-dihydro carbostyril derivatives

Heterocyclic Letters published new progress about 23616-79-7. 23616-79-7 belongs to chlorides-buliding-blocks, auxiliary class Phase Transfer Catalyst, name is N-Benzyl-N,N-dibutylbutan-1-aminium chloride, and the molecular formula is C19H34ClN, Name: N-Benzyl-N,N-dibutylbutan-1-aminium chloride.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Wang, De published the artcileTerpolymers from Borane-Initiated Copolymerization of Triphenyl Arsonium and Sulfoxonium Ylides: An Unexpected Light Emission, Formula: C19H34ClN, the publication is Angewandte Chemie, International Edition (2019), 58(19), 6295-6299, database is CAplus and MEDLINE.

The first synthesis of well-defined poly[(phenylmethylene-co-methylpropenylene)-b-methylene, [(C1-co-C3)-b-C1], terpolymers was achieved by one-pot borane-initiated random copolymerization of ω-methylallyl (C3 units, chain is growing by three carbon atoms at a time) and benzyltriphenylarsonium (C1 units, chain is growing by one carbon atom at a time) ylides, followed by polymerization of sulfoxonium methylide (C1 units). Other substituted arsonium ylides, such as prenyltriphenyl, propyltriphenyl and (4-fluorobenzyl)triphenyl can also be used instead of benzyltriphenylarsonium. The obtained terpolymers are well-defined, possess a predictable mol. weight and low polydispersity (M_n,NMR=1.83-9.68×10³ g mol^-1, D=1.09-1.22). An unexpected light emission phenomenon was discovered in these non-conjugated terpolymers, as confirmed by fluorescence and NMR spectroscopy. This phenomenon can be explained by the isomerization of the double bonds of allylic monomeric units along the chain of the terpolymers (isomerization-induced light emission).

Angewandte Chemie, International Edition published new progress about 23616-79-7. 23616-79-7 belongs to chlorides-buliding-blocks, auxiliary class Phase Transfer Catalyst, name is N-Benzyl-N,N-dibutylbutan-1-aminium chloride, and the molecular formula is C10H10O2, Formula: C19H34ClN.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Peyrovedin, Hamed published the artcileA global model for the estimation of speeds of sound in deep eutectic solvents, Related Products of chlorides-buliding-blocks, the publication is Molecules (2020), 25(7), 1626, database is CAplus and MEDLINE.

Deep eutectic solvents (DESs) are newly introduced green solvents that have attracted much attention regarding fundamentals and applications. Of the problems along the way of replacing a common solvent by a DES, is the lack of information on the thermophys. properties of DESs. This is even more accentuated by considering the dramatically growing number of DESs, being made by the combination of vast numbers of the constituting substances, and at their various molar ratios. The speed of sound is among the properties that can be used to estimate other important thermodn. properties. In this work, a global and accurate model is proposed and used to estimate the speed of sound in 39 different DESs. This is the first general speed of sound model for DESs. The model does not require any thermodn. properties other than the critical properties of the DESs, which are themselves calculated by group contribution methods, and in doing so, make the proposed method entirely independent of any exptl. data as input. The results indicated that the average absolute relative deviation percentages (AARD%) of this model for 420 exptl. data is only 5.4%. Accordingly, based on the achieved results, the proposed model can be used to predict the speeds of sound of DESs.

Molecules published new progress about 23616-79-7. 23616-79-7 belongs to chlorides-buliding-blocks, auxiliary class Phase Transfer Catalyst, name is N-Benzyl-N,N-dibutylbutan-1-aminium chloride, and the molecular formula is C19H34ClN, Related Products of chlorides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Kiran, Sonia published the artcileAlkaline phosphatase-triggered assembly of etoposide enhances its anticancer effect, Recommanded Product: 2-Chlorotrityl chloride, the publication is Chemical Communications (Cambridge, United Kingdom) (2018), 54(15), 1853-1856, database is CAplus and MEDLINE.

Etoposide is a cancer-targeting drug but an overdose of etoposide leads to immunosuppression in patients. Therefore, the development of a new strategy to enhance its anticancer effect, while in the meantime alleviating its adverse effects, is important but challenging. In this work, with the assistance of a hydrogelator precursor Nap-Phe-Phe-Tyr(H₂PO₃)-OH (1P), etoposide phosphate (EP) was subjected to alk. phosphatase (ALP)-triggered assembly, which obviously enhanced its anticancer efficacy in vitro and in vivo. In vitro tests indicated that the assembly of EP with 1P resulted in a slow release of etoposide and long-term inhibitory effects on HeLa cells. In vivo experiments indicated that, compared with those of EP-treated mice, the tumor growth of EP + 1P-treated mice was further inhibited while their body weight loss was alleviated. We envision that our hydrogelator-assisted assembly strategy could be applied to enhance the therapeutic effects of more drugs, while in the meantime alleviating their adverse effects in the future.

Chemical Communications (Cambridge, United Kingdom) published new progress about 42074-68-0. 42074-68-0 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Benzyl chloride,Benzene, name is 2-Chlorotrityl chloride, and the molecular formula is C19H14Cl2, Recommanded Product: 2-Chlorotrityl chloride.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

De Pascale, G. published the artcileValidation for high-throughput screening of a VanRS-based reporter gene assay for bacterial cell wall inhibitors, Application of N-Benzyl-N,N-dibutylbutan-1-aminium chloride, the publication is Journal of Applied Microbiology (2007), 103(1), 133-140, database is CAplus and MEDLINE.

The present study was undertaken to validate, for antibiotic discovery, a reporter gene assay based on a Bacillus subtilis strain expressing the Enterococcus faecium vanRS genes and a vanH-lacZ fusion, which produced β-galactosidase activity in the presence of cell wall inhibitors (CWI) and lysozyme. The reporter assay was miniaturized, automated and validated with antibiotics and tested against portions of chem. and microbial extract libraries. The assay is simple, fast and reproducible and can detect all CWI, sometimes at concentrations lower than those necessary to inhibit bacterial growth. However, some membrane-interfering compounds also generate comparable signals. While most CWI elicit a signal that is transcription-dependent and abolished in an osmoprotective medium, transcription is not required for β-galactosidase activity brought about by the membrane-interfering compounds At least two distinct mechanisms appear to lead to enzymic activity in the reporter strain. Effective counterscreens can be designed to discard the undesired classes of compounds Extensive validation is required before introducing a reporter assay in high-throughput screening. However, the ease of operation and manipulation makes the reporter assays powerful tools for antibiotic discovery.

Journal of Applied Microbiology published new progress about 23616-79-7. 23616-79-7 belongs to chlorides-buliding-blocks, auxiliary class Phase Transfer Catalyst, name is N-Benzyl-N,N-dibutylbutan-1-aminium chloride, and the molecular formula is C19H34ClN, Application of N-Benzyl-N,N-dibutylbutan-1-aminium chloride.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

MacSweeney, Aengus published the artcileDiscovery and Structure-Based Optimization of Adenain Inhibitors, Recommanded Product: 2-Chlorotrityl chloride, the publication is ACS Medicinal Chemistry Letters (2014), 5(8), 937-941, database is CAplus and MEDLINE.

The cysteine protease adenain is the essential protease of adenovirus and, as such, represents a promising target for the treatment of ocular and other adenoviral infections. Through a concise two-pronged hit discovery approach we identified tetrapeptide nitrile 1 and pyrimidine nitrile 2 as complementary starting points for adenain inhibition. These hits enabled the first high-resolution X-ray cocrystal structures of adenain with inhibitors bound and revealed the binding mode of 1 and 2. The screening hits were optimized by a structure-guided medicinal chem. strategy into low nanomolar drug-like inhibitors of adenain.

ACS Medicinal Chemistry Letters published new progress about 42074-68-0. 42074-68-0 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Benzyl chloride,Benzene, name is 2-Chlorotrityl chloride, and the molecular formula is C19H14Cl2, Recommanded Product: 2-Chlorotrityl chloride.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Pryyma, Alla published the artcileRapid, high-yielding solid-phase synthesis of cathepsin-B cleavable linkers for targeted cancer therapeutics, Recommanded Product: 2-Chlorotrityl chloride, the publication is Bioconjugate Chemistry (2020), 31(12), 2685-2690, database is CAplus and MEDLINE.

Antibody-drug conjugates (ADCs) constitute an emerging class of anticancer agents that deliver potent payloads selectively to tumors while avoiding systemic toxicity associated with conventional chemotherapeutics. Critical to ADC development is a serum-stable linker designed to decompose inside targeted cells thereby releasing the toxic payload. A protease-cleavable linker comprising a valine-citrulline (Val-Cit) motif has been successfully incorporated into three FDA-approved ADCs and is found in numerous preclin. candidates. Herein, we present a high-yielding and facile synthetic strategy for a Val-Cit linker that avoids extensive protecting group manipulation and laborious chromatog. associated with previous syntheses and provides yields that are up to 10-fold higher than by standard methods. This method is easily scalable and takes advantage of cost-effective coupling reagents and high loading 2-chlorotrityl chloride (2-CTC) resin. Modularity allows for introduction of various conjugation handles in final stages of the synthesis. Facile access to such analogs serves to expand the repertoire of available enzymically cleavable linkers for ADC generation. This methodol. empowers a robust and facile library generation and future exploration into linker analogs containing unnatural amino acids as a selectivity tuning tool.

Bioconjugate Chemistry published new progress about 42074-68-0. 42074-68-0 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Benzyl chloride,Benzene, name is 2-Chlorotrityl chloride, and the molecular formula is C19H14Cl2, Recommanded Product: 2-Chlorotrityl chloride.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Staderini, Matteo published the artcileA tripod anchor offers improved robustness of peptide-based electrochemical biosensors, Product Details of C19H14Cl2, the publication is Sensors and Actuators, B: Chemical (2018), 662-667, database is CAplus.

Peptide-based electrochem. biosensors have proven to be powerful sensing strategies for the detection of proteases and offer a highly versatile system, as simple tuning of the immobilized substrate peptide leads to a new sensing platform. The most common immobilization strategy of peptides onto an electrode surface is via a self-assembled monolayer (SAM) through a thiol group that can be readily chem. incorporated in the target peptide. However, the successful application of these platforms in complex biol. samples can be frustrated by the lack of stability of the peptide-based SAM, that can lead to false positives and limited shelf-life. Herein, we investigated the stability of a peptide-based electrochem. platform endowed with a single or a tribranched thiol group for attaching onto the electrode surface. Side-by-side comparison demonstrated that the tripod anchor generated a highly robust peptide-based electrochem. biosensor that showed improved stability when compared to the monoanchor analog, simplifying data anal. and interpretation, while showing efficient protease detection and similar sensing capabilities.

Sensors and Actuators, B: Chemical published new progress about 42074-68-0. 42074-68-0 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Benzyl chloride,Benzene, name is 2-Chlorotrityl chloride, and the molecular formula is C10H10O3, Product Details of C19H14Cl2.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Droge, Steven T. J. published the artcileIon-Exchange Affinity of Organic Cations to Natural Organic Matter: Influence of Amine Type and Nonionic Interactions at Two Different pHs, Name: N-Benzyl-N,N-dibutylbutan-1-aminium chloride, the publication is Environmental Science & Technology (2013), 47(2), 798-806, database is CAplus and MEDLINE.

Sorption to standard soil organic matter (SOM) was studied for a wide variety of organic cations using a flow through method with fully aqueous medium as eluent. SOM sorption for weak bases (pK_a 4.5-7) was stronger at pH 4.5 than at pH 7, indicating that the ion-exchange affinity of the cationic species to SOM was higher than the bulk partition coefficient of corresponding neutral species to SOM. At pH 4.5-7, the effect of pH on the sorption coefficients for strong bases with pK_a >7 was small, within 0.3 log units. For cations with the mol. formula C_xH_yN, sorption was accurately predicted by a model accounting for size (increase with alkyl chain length) and type of charged group (1° amine >4° ammonium of equal size). In addition to the C_xH_yN-model, several empirical correction factors were derived from the data for organic cations with polar functional groups. Models based on K_OW or pK_a fail to explain differences in sorption affinity of the ionic species. Our data on ion-exchange affinities for 80 organic cations show many examples where specific chem. moieties, for example, CH₂-units, aromatic rings or hydroxyl groups, contribute differently to the sorption coefficient as compared to bulk partitioning data of neutral compounds Other sorption models that were evaluated to explain variation between compounds suffered from outliers of >1 log unit and did not reduce relative log mean standard errors <0.5. A wider range of sorption coefficients and more sorption data in general are required to improve modeling efforts further.

Environmental Science & Technology published new progress about 23616-79-7. 23616-79-7 belongs to chlorides-buliding-blocks, auxiliary class Phase Transfer Catalyst, name is N-Benzyl-N,N-dibutylbutan-1-aminium chloride, and the molecular formula is C19H34ClN, Name: N-Benzyl-N,N-dibutylbutan-1-aminium chloride.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Droge, Steven T. J. published the artcileSorption of Organic Cations to Phyllosilicate Clay Minerals: CEC-Normalization, Salt Dependency, and the Role of Electrostatic and Hydrophobic Effects, HPLC of Formula: 23616-79-7, the publication is Environmental Science & Technology (2013), 47(24), 14224-14232, database is CAplus and MEDLINE.

Sorption to the phyllosilicate clay minerals Illite, kaolinite, and bentonite has been studied for a wide variety of organic cations using a flow-through method with fully aqueous medium as the eluent. Linear isotherms were observed at concentrations below 10% of the cation-exchange capacity (CEC) for Illite and kaolinite and below 1 mmol/kg (<1% CEC) for bentonite. Sorption to clays was strongly influenced by the electrolyte composition of the eluent but with a consistent trend for a diverse set of compounds on all clays, thus allowing for empirical correction factors. When sorption affinities for a given compound to a given clay are normalized to the CEC of the clay, the differences in sorption affinities between clays are reduced to less than 0.5 log units for most compounds Although CEC-normalized sorption of quaternary ammonium compounds to clay was up to 10-fold higher than CEC-normalized sorption to soil organic matter, CEC-normalized sorption for most compounds was comparable between clays and soil organic matter. The clay fraction is thus a potentially relevant sorption phase for organic cations in many soils. The sorption data for organic cations to clay showed several regular trends with mol. structure but also showed quite a few systematic effects that we cannot explain. A model on the basis of the mol. size and charge d. at the ionized nitrogen is used here as a tool to obtain benchmark values that elucidate the effect of specific polar moieties on the sorption affinity.

Environmental Science & Technology published new progress about 23616-79-7. 23616-79-7 belongs to chlorides-buliding-blocks, auxiliary class Phase Transfer Catalyst, name is N-Benzyl-N,N-dibutylbutan-1-aminium chloride, and the molecular formula is C19H34ClN, HPLC of Formula: 23616-79-7.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics