Tag: M.W=250-300

He, Benzhao; Zhang, Jing; Wang, Jia; Wu, Yongwei; Qin, Anjun; Tang, Ben Zhong published the artcile< Preparation of multifunctional hyperbranched poly(β-aminoacrylate)s by spontaneous amino-yne click polymerization>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is hyperbranched polyaminoacrylate aminoyne click polymerization.

A series of multifunctional hyperbranched poly(β-aminoacrylate)s (hb-PAAs) were synthesized using spontaneous amino-yne click polymn for the first time. Using the optimized polymerization conditions, soluble and thermally stable hb-PAAs with high weight-average mol. weights (Mw up to 18,290) were obtained in excellent yields (up to 99%). This click polymerization also can proceed in stereo- and regiospecific and anti-Markovnikov addition fashion, and 100% E-isomers were obtained. Moreover, introducing the aggregation-induced emission (AIE)-active tetraphenylethene moiety into polymer backbones endows the resultant polymers with unique AIE properties, and their nanoaggregates can be used for sensitive detection of explosives. This work not only enriches the family of hyperbranched polymers but also confirms the universality of the spontaneous amino-yne click polymerization

Macromolecules (Washington, DC, United States) published new progress about Aggregation-induced emission. 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

Yu, Xiao-Ye; Chen, Jia-Rong; Wang, Peng-Zi; Yang, Meng-Nan; Liang, Dong; Xiao, Wen-Jing published the artcile< Visible-Light-Driven Iminyl Radical-Mediated C-C Single Bond Cleavage/Radical Addition Cascade of Oxime Esters>, Application of C19H34O2, the main research area is iminyl radical light carbon bond cleavage cascade oxime ester; N-centered radicals; heterocycles; iminyl radicals; nitriles; photoredox catalysis.

A room-temperature, visible-light-driven N-centered iminyl radical-mediated and redox-neutral C-C single bond cleavage/radical addition cascade reaction of oxime esters and unsaturated systems was accomplished. The strategy tolerates a wide range of O-acyl oximes and unsaturated systems, such as alkenes, silyl enol ethers, alkynes, and isonitrile, enabling highly selective formation of various chem. bonds. This method thus provides an efficient approach to various diversely substituted cyano-containing alkenes, ketones, carbocycles, and heterocycles.

Angewandte Chemie, International Edition published new progress about Alkenes Role: RCT (Reactant), RACT (Reactant or Reagent). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Application of C19H34O2.

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

Yu, Shaomei; Zhang, Ying published the artcile< Effects of lactic acid bacteria on nitrite degradation during pickle fermentation>, Reference of 112-63-0, the main research area is pickle nitrite fermentation lactic acid bacteria.

Two strains with nitrite degradation ability were obtained from Kimchi. According to morphol., Gram-stain, physiol. tests, the isolates were identified primarily as Lactobacillus brevis and Lactobacillus plantarum, resp. Comparing the nitrite degradation rate of two strains, the strain L. plantarum Z1 with higher degradation rate was utilized to investigate effects on sodium nitrite degradation (NaNO2) during pickle fermentation The strain L. plantarum Z1 was inoculated to 200mL MRS medium including 120μg/mL NaNO2 with inoculum of 1% after culturing at 30°C for 18 h. Several experiments that involved different temperature, pH, substrate concentration were carried out. Nitrite degradation ability of L. plantarum Z1 was estimated from detection of the residue concentration of NaNO2. The optimal conditions for nitrite degradation were: growing temperature at 30°C, initial pH at 5.5 and substrate concentration of 400μg/mL. Under these conditions, the nitrite degradation efficiency was up to 96% with residue of 4.8μg/mL which is below the content of National Standards The ability to degrade sodium nitrite provided a tool for LAB (Lactic acid bacteria) application to improve their industrial performance.

Advanced Materials Research (Durnten-Zurich, Switzerland) published new progress about Fermentation. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Reference of 112-63-0.

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

Soba, David; Arrese-Igor, Cesar; Aranjuelo, Iker published the artcile< Additive effects of heatwave and water stresses on soybean seed yield is caused by impaired carbon assimilation at pod formation but not at flowering>, Electric Literature of 112-63-0, the main research area is soybean seed heatwave water stress carbon pod flowering; C and N metabolism; Heatwave; Interacting stresses; Nodule; Soybean; Water stress.

Heatwave (HW) combined with water stress (WS) are critical environmental factors neg. affecting crop development. This study aimed to quantify the individual and combined effects of HW and WS during early reproductive stages on leaf and nodule functioning and their relation with final soybean seed yield (SY). For this purpose, during flowering (R2) and pod formation (R4) soybean (Glycine max L. Merr.) plants were exposed to different temperature (ambient[25°C] vs. HW[40°C]) and water availability (full capacity vs. WS[20% field capacity]). HW, WS and their combined impact on yield depended on the phenol. stage at which stress was applied being more affected at R4. For gas exchange, WS severely impaired photosynthetic machinery, especially when combined with HS. Impaired photoassimilate supply at flowering caused flower abortion and a significant reduction in final SY due to interacting stresses and WS. On the other hand, at pod formation (R4), decreased leaf performance caused additive effect on SY by decreasing pod setting and seed size with combined stresses. At the nodule level, WS (alone or in combination with HW) caused nodule impairment, which was reflected by lower leaf N. Such response was linked with a poor malate supply to bacteroids and feed-back inhibition caused by nitrogenous compounds accumulation. In summary, our study noted that soybean sensitivity to interacting heat and water stresses was highly conditioned by the phenol. stage at which it occurs with, R4 stage being the critical moment. To our knowledge this is the first soybean work integrating combined stresses at early reproductive stages.

Plant Science (Shannon, Ireland) published new progress about Anthocyanins Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Electric Literature of 112-63-0.

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

Ganesa, Sachita; Sule, Amrita; Sundaram, Ranjini K.; Bindra, Ranjit S. published the artcile< Mismatch repair proteins play a role in ATR activation upon temozolomide treatment in MGMT-methylated glioblastoma>, Computed Properties of 112-63-0, the main research area is glioblastoma MGMT mismatch repair proteins temozolomide.

The methylation status of the O6-methylguanine methyltransferase (MGMT) gene promoter has been widely accepted as a prognostic biomarker for treatment with the alkylator, temozolomide (TMZ). In the absence of promoter methylation, the MGMT enzyme removes O6-methylguanine (O6-meG) lesions. In the setting of MGMT-promoter methylation (MGMT-), the O6-meG lesion activates the mismatch repair (MMR) pathway which functions to remove the damage. Our group reported that loss of MGMT expression via MGMT promoter silencing modulates activation of ataxia telangiectasia and RAD3 related protein (ATR) in response to TMZ treatment, which is associated with synergistic tumor-cell killing. Whether or not MMR proteins are involved in ATR activation in MGMT-cells upon alkylation damage remains poorly understood. To investigate the function of MMR in ATR activation, we created isogenic cell lines with knockdowns of the individual human MMR proteins MutS homolog 2 (MSH2), MutS homolog 6 (MSH6), MutS homolog 3 (MSH3), MutL homolog 1 (MLH1), and PMS1 homolog 2 (PMS2). Here, we demonstrate that MSH2, MSH6, MLH1 and PMS2, specifically, are involved in the activation of the ATR axis after TMZ exposure, whereas MSH3 is likely not. This study elucidates a potential mechanistic understanding of how the MMR system is involved in ATR activation by TMZ in glioblastoma cells, which is important for targeting MMR-mutated cancers.

Scientific Reports published new progress about Alkylation. 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

Wang, Yachen; Gao, Mingxing; Li, Sai; Liu, Jun; Feng, Anchao; Zhang, Liqun published the artcile< Recyclable, self-healable and reshape vitrified poly-dimethylsiloxane composite filled with renewable cellulose nanocrystal>, Formula: C19H34O2, the main research area is recyclable self healable vitrified polysiloxane composite renewable cellulose nanocrystal.

Traditional thermoset polymeric materials pose an enormous burden on the environment due to permanent covalent crosslinks that make them difficult to reprocess or recycle. Herein, we describe the facile synthesis of recyclable, healable and reprocessable poly-dimethylsiloxane (PDMS)/cellulose nanocrystals (CNC) composites via engineering dynamic covalent bond (DCB) vinylogous urethane between the polymer-polymer and polymer-CNC. We successfully prepared the amine-modified CNC, evidenced by the anal. of FTIR, XPS and Element anal., and its surface morphol. as well as its size compared to the pristine one is not altered via XRD and TEM anal. The DCBs are constructed not only between polymer chains, but also on the interface between polymer and CNC. Interestingly, the macromol. cross-linker synthesized by RAFT polymerization significantly improves the mech. properties of PDMS-based CNC vitrimer, without affecting its recycling and reprocessing properties. Remarkably, DCB vinylogous urethane endows this vitrimer good self-healing, reprocessing and recycling and this DCB can be effectively reshaped by the catalyst-free transamination of the vinylogous urethane through hot pressing or welding. It is emphasized that this macromol. crosslinker containing β-keto acids obtained by RAFT polymerization can significantly broaden the application range for DCB vinylogous urethane. In general, this work could provide a facile approach to design and fabricate high performance renewable CNC based composites with excellent self-healing, reprocessing and recycling capabilities.

Polymer published new progress about Binding energy. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Formula: C19H34O2.

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

Peter, Aron; Crisenza, Giacomo E. M.; Procter, David J. published the artcile< Asymmetric Total Synthesis of (-)-Phaeocaulisin A>, Formula: C19H34O2, the main research area is asym total synthesis phaeocaulisin A samarium iodide cyclization lactone.

The therapeutic properties of Curcuma (ginger and turmeric’s family) have long been known in traditional medicine. However, only recently have guaiane-type sesquiterpenes extracted from Curcuma phaeocaulis been submitted to biol. testing, and their enhanced bioactivity was highlighted. Among these compounds, phaeocaulisin A has shown remarkable anti-inflammatory and anticancer activity, which appears to be tied to the unique bridged acetal moiety embedded in its tetracyclic framework. Prompted by the promising biol. profile of phaeocaulisin A and by the absence of a synthetic route for its provision, we have implemented the first enantioselective total synthesis of phaeocaulisin A in 17 steps with 2% overall yield. Our route design builds on the identification of an enantioenriched lactone intermediate, tailored with both a ketone moiety and a conjugated alkene system. Taking advantage of the umpolung carbonyl-olefin coupling reactivity enabled by the archetypal single-electron transfer (SET) reductant samarium diiodide (SmI2), the lactone intermediate was submitted to two sequential SmI2-mediated cyclizations to stereoselectively construct the polycyclic core of the natural product. Crucially, by exploiting the innate inner-sphere nature of carbonyl reduction using SmI2, we have used a steric blocking strategy to render sites SET-unreceptive and thus achieve chemoselective reduction in a complex substrate. Our asym. route enabled elucidation of the naturally occurring isomer of phaeocaulisin A and provides a synthetic platform to access other guaiane-type sesquiterpenes from C. phaeocaulis-as well as their synthetic derivatives-for medicinal chem. and drug design.

Journal of the American Chemical Society published new progress about Absolute configuration (absolute configuration reassignment of natural phaeocaulisin A). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Formula: C19H34O2.

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

Chupak, Louis S.; Zheng, Xiaofan; Hu, Shuanghua; Huang, Yazhong; Ding, Min; Lewis, Martin A.; Westphal, Ryan S.; Blat, Yuval; McClure, Andrea; Gentles, Robert G. published the artcile< Structure activity relationship studies on chemically non-reactive glycine sulfonamide inhibitors of diacylglycerol lipase>, Application of C19H34O2, the main research area is benzylic glycine sulfonamide preparation diacylglycerol lipase inhibitor structure activity; 2-Arachidonoylglycerol; Diacylglycerol; Endocannabinoid; Glycine; Lipase inhibitor; Sulfonamide.

N-Benzylic-substituted glycine sulfonamides that reversibly inhibit diacylglycerol (DAG) lipases are reported. Detailed herein are the structure activity relationships, profiling characteristics and physico-chem. properties for the first reported series of DAG lipase (DAGL) inhibitors that function without covalent attachment to the enzyme. Highly potent examples are presented that represent valuable tool compounds for studying DAGL inhibition and constitute important leads for future medicinal chem. efforts.

Bioorganic & Medicinal Chemistry published new progress about Diglycerides Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Application of C19H34O2.

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

Cohen, Louis Arthur; Kirk, Kenneth L. published the artcile< Photochemical decomposition of diazonium fluoroborates. Application to the synthesis of ring-fluorinated imidazoles>, Application of C19H34O2, the main research area is imidazole fluoro; diazonium fluoroborate photodecomposition; histidine fluoro.

Photochem. decomposition of imidazolediazonium fluoroborates, in fluoroboric acid solution at 10-25°, leads to ring-fluorinated imidazoles. Compounds synthesized by this method include 2-fluoroimidazole, 4-fluoroimidazole, 4 – fluoroimidazole – 5 – carboxylic acid (esters and amides), and 4-fluoro-DL-histidine. These compounds are of interest as analogs of biochem. and pharmacol. significant imidazoles.

Journal of the American Chemical Society published new progress about Diazonium compounds Role: RCT (Reactant), RACT (Reactant or Reagent). 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Application of C19H34O2.

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

Bahekar, Rajesh H.; Jain, Mukul R.; Jadav, Pradip A.; Prajapati, Vijay M.; Patel, Dipam N.; Gupta, Arun A.; Sharma, Ajay; Tom, Robby; Bandyopadhya, Debdutta; Modi, Honey; Patel, Pankaj R. published the artcile< Synthesis and antidiabetic activity of 2,5-disubstituted-3-imidazol-2-yl-pyrrolo[2,3-b]pyridines and thieno[2,3-b]pyridines>, Formula: C19H34O2, the main research area is imidazolpyrrolo pyridine thienopyridine derivative preparation structure antidiabetic diabetes mellitus.

In the present investigation, two series of 2,5-disubstituted-3-imidazol-2-yl-pyrrolo[2,3-b]pyridines (2a-l) and thieno[2,3-b]pyridines (3a-l) were designed as analogs of BL 11282 (1). The in vitro glucose dependent insulinotropic activity of all the test compounds was evaluated using RIN5F cell based assay and all the test compounds showed glucose and concentration dependent insulin secretion. The in vivo antidiabetic activities of most potent compounds from each series (I and II) were assessed in C57BL/6J mice. Compounds I and II showed dose dependent insulin secretion and significant glucose reduction in vivo. In general, compounds I and II were found to be equipotent at all the three different doses selected and with respect to BL 11282, both the test compounds were found to be more potent, at all the time points.

Bioorganic & Medicinal Chemistry published new progress about Antidiabetic agents. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Formula: C19H34O2.

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