Tag: M.W=250-300

Gianotti, Massimo; Corti, Corrado; Delle Fratte, Sonia; Di Fabio, Romano; Leslie, Colin P.; Pavone, Francesca; Piccoli, Laura; Stasi, Luigi; Wigglesworth, Mark J. published the artcile< Novel imidazobenzazepine derivatives as dual H1/5-HT2A antagonists for the treatment of sleep disorders>, SDS of cas: 112-63-0, the main research area is imidazo benzazepine derivative preparation dual H1 5HT2A antagonist structure; sleep disorder imidazo benzazepine derivative.

A novel imidazobenzazepine template (5a) with potent dual H1/5-HT2A antagonist activity was identified. Application of a zwitterionic approach to this poorly selective and poorly developable starting point successfully delivered a class of high quality leads, 3-[4-(3-R1-2-R-5H-imidazo[1,2-b][2]benzazepin-11-yl)-1-piperazinyl]-2,2-dimethylpropanoic acids (e.g., 9, 19, 20, and 21), characterized by potent and balanced H1/5-HT2A receptor antagonist activities and good developability profiles.

Bioorganic & Medicinal Chemistry Letters published new progress about 5-HT2A antagonists. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, SDS of cas: 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Moser, Russell J.; Brown, Ellis V. published the artcile< Decarboxylation of 5-substituted 2-pyridinecarboxylic acids>, Category: esters-buliding-blocks, the main research area is thermodn pyridinecarboxylate decarboxylation.

The rates of decarboxylation of 5-nitro-2-pyridinecarboxylic, 2,5-pyridinedicarboxylic, 5-iodo-2-pyridinecarboxylic, and 5-methoxy-2-pyridinecarboxylic acids in 3-nitrotoluene were measured. The ΔG, ΔH, and dS were calculated An examination of the linear free energy plot of relative rates vs. the σp constants, suggests that electron withdrawal from the 5-position results in lower ΔG values. The observation that 2-pyridinecarboxylic acid (I) does not fall on the same straight line as these acids suggests that I can either lead to a cyclic transition state or to a zwitterion intermediate which then decarboxylates. The pathway that a particularly substituted 2-pyridinecarboxylic acid follows depends upon the electron density on the ring N. A mechanism is given which is consistent with the available data. An assumption of this interpretation is that some monomer exists in solution at high temperature

Journal of Organic Chemistry published new progress about Decarboxylation kinetics. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Category: esters-buliding-blocks.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Zhu, Zixi; Boger, Dale L. published the artcile< N1/N4 1,4-Cycloaddition of 1,2,4,5-Tetrazines with Enamines Promoted by the Lewis Acid ZnCl2>, Quality Control of 112-63-0, the main research area is tetrahydrobenzotriazine preparation; tetrazine enamine zinc mediated regioselective cycloaddition.

The second example of selective N1/N4 1,4-cycloaddition (vs C3/C6 1,4-cycloaddition) of 1,2,4,5-tetrazines with preformed or in-situ generated enamines promoted by the Lewis acid ZnCl2 and with an expanded scope was described. The reaction constituted a formal [4+2] cycloaddition across two nitrogen atoms (N1/N4 vs C3/C6) of a 1,2,4,5-tetrazine followed by retro [4+2] cycloaddition loss of a nitrile and aromatization to provide 1,2,4-triazines. Optimization of reaction parameters, simplification of its implementation through in-situ enamine generation from ketones, definition of the enamine reaction scope for 3,6-bis(thiomethyl)-1,2,4,5-tetrazine, exploration of the 1,2,4,5-tetrazine scope, and representative applications of the product 1,2,4-triazines were detailed. The work established and further extended a powerful method for efficient one-step regioselective synthesis of 1,2,4-triazines under mild reaction conditions directly now from easily accessible ketones. It extended the substrate scope of a solvent (hexafluoroisopropanol) hydrogen bonding-promoted reaction that recently reported with aryl-conjugated enamines, permitting the use of simple ketone-derived enamines and expanding the generality of the remarkable reaction. The reaction was regioselective with respect to the site of reaction with unsym. ketones and provided exclusively a single 1,2,4-triazine regioisomer consistent with previously established stepwise mechanism of formal N1/N4 1,4-cycloaddition, overcoming the challenges observed in conventional approaches to 1,2,4-triazines.

Journal of Organic Chemistry published new progress about Cycloaddition reaction catalysts (regioselective). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Quality Control of 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Pang, Xudong; Wang, Xuan; Shen, Yongjia published the artcile< Synthesis of 4,4'-bis (2-cyanovinyl)-stilbene>, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is fluorescent brightener biscyanovinylstilbene synthesis.

The theory of whitening of fluorescent brightening agents was introduced briefly. A hypothesis of the whitening effect of a stilbene brightener related to the number of vinyl groups was suggested. A compound containing three vinyl groups, 4,4′-bis(2-cyanovinyl)-stilbene, was designed and synthesized from p-nitrobenzyl halogen by Wittig reaction, hydrazine-reduction and Meerwein reaction. The yield was 37% and its chem. structure was characterized by 1H-NMR and MS. The test results indicated that its fluorescence strength was a little higher than that of C. I. Fluorescent Whitener Agent 199 and the hypothesis was proved preliminary.

Ranliao Yu Ranse published new progress about Fluorescence. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Name: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Cleator, Ed; Baxter, Carl A.; O’Hagan, Michael; O’Riordan, Timothy J. C.; Sheen, Faye J.; Stewart, Gavin W. published the artcile< Synthesis of novel benzoxathiazepine-1,1-dioxides by means of a one-pot multicomponent reaction>, HPLC of Formula: 112-63-0, the main research area is benzoxathiazepine oxide preparation.

A simple one-pot synthesis of benzoxathiazepine-1,1-dioxides is described. Increased yields are afforded when suitable substituents are present in one of the starting materials. These addnl. substituents also provide a handle for further functionalization.

Tetrahedron Letters published new progress about Multicomponent reaction. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, HPLC of Formula: 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Retini, Michele; Bartolucci, Silvia; Bartoccini, Francesca; Mari, Michele; Piersanti, Giovanni published the artcile< Concise and Convergent Enantioselective Total Syntheses of (+)- and (-)-Fumimycin>, Related Products of 112-63-0, the main research area is fumimycin enantioselective synthesis.

The concise and convergent total syntheses of (+)- and (-)-Fumimycin (I) have been achieved by taking advantage of strategies for the asym. aza-Friedel-Crafts reaction of a highly substituted hydroquinone and N-fumaryl ketimine generated from the corresponding dehydroalanine. The enantiomerically pure natural product and its enantiomer were prepared in seven steps and 22% overall yield by employing both enantiomers of a BINOL-derived chiral phosphoric acid (CPA) catalyst.

Journal of Organic Chemistry published new progress about Enantioselective synthesis. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Related Products of 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Wu, Dongdong; Lei, Hai; Xie, Xian; Zhou, Liang; Zheng, Peng; Cao, Yi; Zhang, Yan published the artcile< Self-sorting double network hydrogels with photo-definable biochemical cues as artificial synthetic extracellular matrix>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is double network hydrogel extracellular matrix immunofluorescence staining.

In soft connective tissues, the extracellular matrix (ECM) provides spatiotemporally well-defined mech. and chem. cues that regulate the functions of residing cells. However, it remains challenging to replicate these essential features in synthetic biomaterials. Here, we develop a self-sorting double network hydrogel (SDNH) with spatially well-defined bioactive ligands as synthetic ECM. Specifically, the SDNH is made of two peptides that can independently self-assemble into fibers of different microscopic features, mimicking the hierarchical protein assemblies in ECM. Each peptide contains a photo-reactive moiety for orthogonally patterning bioactive mols. (i.e., cyclic arginine-glycine-aspartate (cRGD) and osteogenic growth peptide (OGP)) using UV and visible light. As a proof-of-principle, we demonstrate the engineering of SDNH with spatially separated or colocalized cRGD and OGP mols. to control the response of encapsulated stem cells. Our study represents an important step towards defining the mech. and biochem. cues of synthetic ECM using advanced chem. biol. tools. [graphic not available: see fulltext]

Nano Research published new progress about Cell culture. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Chardon, Fabien; De Marco, Federica; Marmagne, Anne; Le Hir, Rozenn; Vilaine, Francoise; Bellini, Catherine; Dinant, Sylvie published the artcile< Natural variation in the long-distance transport of nutrients and photoassimilates in response to N availability>, SDS of cas: 112-63-0, the main research area is nitrogen nutrient transport phloem xylem natural variation Arabidopsis; Allocation; Pipecolate; Raffinose; Succinate; Sucrose; Transport.

Phloem and xylem tissues are necessary for the allocation of nutrients and photoassimilates. However, how the long-distance transport of carbon (C) and nitrogen (N) is coordinated with the central metabolism is largely unknown. To better understand how the genetic and environmental factors influence C and N transport, we analyzed the metabolite profiles of phloem exudates and xylem saps of five Arabidopsis thaliana accessions grown in low or non-limiting N supply. We observed that xylem saps were composed of 46 or 56% carbohydrates, 27 or 45% amino acids, and 5 or 13% organic acids in low or non-limiting N supply, resp. In contrast, phloem exudates were composed of 76 or 86% carbohydrates, 7 or 18% amino acids, and 5 or 6% organic acids. Variation in N supply impacted amino acid, organic acid and sugar contents. When comparing low N and non-limiting N, the most striking differences were variations of glutamine, aspartate, and succinate abundance in the xylem saps and citrate and fumarate abundance in phloem exudates. In addition, we observed a substantial variation of metabolite content between genotypes, particularly under high N. The content of several organic acids, such as malate, citrate, fumarate, and succinate was affected by the genotype alone or by the interaction between genotype and N supply. This study confirmed that the response of the of nutrients in the phloem and the xylem to N availability is associated with the regulation of the central metabolism and could be an adaptive trait.

Journal of Plant Physiology published new progress about Amino acids Role: ANT (Analyte), BSU (Biological Study, Unclassified), ANST (Analytical Study), BIOL (Biological Study). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, SDS of cas: 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Vinogradov, Serguei; Batrakova, Elena; Li, Shu; Kabanov, Alexander published the artcile< Polyion Complex Micelles with Protein-Modified Corona for Receptor-Mediated Delivery of Oligonucleotides into Cells>, Computed Properties of 112-63-0, the main research area is oligonucleotide delivery micelle PEG polyethyleneimine transferrin.

Graft-copolymers, containing poly(ethylene glycol) (PEG) and polyethyleneimine (PEI) chains have been proposed as carriers for delivery of phosphorothioate oligonucleotides (SODNs). Complexes of such copolymers with SODN self-assemble into particles having a core of neutralized PEI and SODN and a corona of PEG. Transferrin mols. are attached to the PEG corona using avidin/biotin construct. For this purpose, biotin moieties are covalently linked to the free ends of the PEG chains in the PEG-g-PEI copolymer. SODNs are reacted with mixtures of biotinylated and biotin-free PEG-g-PEI copolymers of various compositions to adjust the number of the biotin moieties in the complex. Resulting complexes have small size (ca. 40 nm) and do not aggregate in aqueous solutions for at least several days. To attach transferrin, they are supplemented first with avidin and then with biotin-transferrin conjugate. This increases the effective diameter of the particles to ca. 75-103 nm, depending on the composition of the complex. Cellular accumulation and fluorescence microscopy studies characterize the effects of these modifications on interaction of fluorescently labeled SODNs with KBv cell monolayers. The data suggest significant enhancement of SODN association with cells resulting from modification of the complex with transferrin. SODN complimentary to the site 546-565 of human mdr 1-mRNA was used to inhibit expression of the drug efflux transporter, P-glycoprotein (P-gp), in multiple drug resistant (MDR) cancer cells (KBv, MCF-7 ADR). Accumulation of a P-gp specific probe, rhodamine 123, in the cell monolayers is used to characterize the effects on P-gp efflux system following the treatment of the cells with antisense SODN or its complexes. This study suggests that antisense SODN incorporated in the complexes retain the ability to inhibit P-gp efflux system, while complexes of the randomized control SODN are inactive. Therefore, the antisense SODN is released from the complex and interacts with its intracellular target upon interaction of the complexes with the cells. Furthermore, modification of the complexes with transferrin leads to a significant increase of the effects of the antisense SODN on the P-gp efflux system in the cells. Overall, this study suggests that polyion complex micelles with protein-modified corona are promising tools for the delivery of antisense SODN.

Bioconjugate Chemistry published new progress about Animal gene, MDR1 Role: BSU (Biological Study, Unclassified), PRP (Properties), BIOL (Biological Study) (targeting of). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Computed Properties of 112-63-0.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Tilford, R. William; Mugavero, Sam J. III; Pellechia, Perry J.; Lavigne, John J. published the artcile< Tailoring microporosity in covalent organic frameworks>, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is microporosity covalent organic framework microporous material pore size; boronate esters; covalent organic frameworks; polymeric materials; porous materials.

The microporosity of covalent organic frameworks (COFs) based on poly(boronate ester) formation is tailored using a facile synthetic approach that introduces alkyl functionalities into the pore and generates networks with pore diameters ranging from 1 to 2 nm. The added substituents significantly alter the host-guest properties of the resulting materials.

Advanced Materials (Weinheim, Germany) published new progress about Microporosity. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Recommanded Product: (9Z,12Z)-Methyl octadeca-9,12-dienoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics