Tag: M.W=250-300

Yang, Bo; Yang, Wu; Guo, Yonghong; You, Lijun; He, Chuan published the artcile< Enantioselective Silylation of Aliphatic C-H Bonds for the Synthesis of Silicon-Stereogenic Dihydrobenzosiloles>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is rhodium catalyzed enantioselective silylation cyclization styrene derivative arylsilane; silicon stereogenic dihydrobenzosilole containing dehydrocholesterol preparation crystal structure; mol structure silicon stereogenic dihydrobenzosilole containing dehydrocholesterol; C(sp3)−H silylation; asymmetric catalysis; dihydrobenzosiloles; hydrosilylation; silanes.

A Rh(I)-catalyzed enantioselective silylation of aliphatic C-H bonds for the synthesis of Si-stereogenic dihydrobenzosiloles is demonstrated. This reaction involves a highly enantioselective intramol. C(sp3)-H silylation of dihydrosilanes, followed by a stereospecific intermol. alkene hydrosilylation leading to the asym. tetrasubstituted silanes. A wide range of dihydrosilanes and alkenes displaying various functional groups are compatible with this process, giving access to a variety of highly functionalized Si-stereogenic dihydrobenzosiloles in good to excellent yields and enantioselectivities.

Angewandte Chemie, International Edition published new progress about Crystal structure. 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

Jin, Ming-Yu; Kim, Sun-Min; Han, Hog-Yu; Ryu, Do-Hyun; Yang, Jung-Woon published the artcile< Switching Regioselectivity in Crossed Acyloin Condensations between Aromatic Aldehydes and Acetaldehyde by Altering N-Heterocyclic Carbene Catalysts>, Reference of 112-63-0, the main research area is asym crossed acyloin condensation chiral catalyst; regioselectivity acyloin condensation aromatic aldehyde acetaldehyde heterocyclic carbene catalyst.

An unprecedented high level of regioselectivities (up to 96%) in the intermol. crossed acyloin condensations of various aromatic aldehydes with acetaldehyde was realized by an appropriate choice of N-heterocyclic carbene catalysts.

Organic Letters published new progress about Acyloin condensation. 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

He, Linhua; Mei, Yukui; Peng, Zhulun published the artcile< Synthesis of diclazuril>, Quality Control of 112-63-0, the main research area is diclazuril preparation protozoacide.

The protozoacide Diclazuril was synthesized by substituting 3,4,5-trichloronitrobenzene with 4-chlorophenylacetonitrile in the presence of NaOH, reducing with Fe/NH4Cl, diazotizing with NaNO2/HCl and adding with Et cyanoacetylcarbamate to obtain Et [2-[4-(4-chlorophenylcyanomethyl)-3,5-dichlorophenylhydrazo]-2-cyanoacetyl]carbamate, cyclizing intramolecularly in acetic acid in the presence of KOAc under refluxing for 2 h, and hydrolyzing and decarboxylating with 36% HCl and mercaptoacetic acid under refluxing for 8 h, etc.

Zhongguo Yiyao Gongye Zazhi published new progress about Protozoacides. 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

Feng, Wei-Xu; van der Lee, Arie; Legrand, Yves-Marie; Petit, Eddy; Dan, Dumitrescu; Su, Cheng-Yong; Barboiu, Mihail published the artcile< Adaptive Encapsulation of ω-Amino Acids and Their Guanidinium-Amide Congeners>, Category: esters-buliding-blocks, the main research area is omega amino acid guanidinium amide adaptive encapsulation.

The binding and the encapsulation of the 6-aminohexanoic acid (1) and 11-aminoundecanoic acid (2) are achieved in aqueous solution and in crystalline Pyrene-box cages. Unexpectedly, the amino-guanidinium AG+ and the amino acids 1 or 2 are reacting in aqueous solution in the absence and in the presence of Pyrene-box cages. The formation of an amide bond between a carboxylic acid and the amino-guanidine unit under mild acidic conditions in water without the use a coupling reagent is extremely interesting and unexpected. The resulted adducts AG1 and AG2 show adaptive binding behaviors and compressions.

Organic Letters published new progress about Amidation. 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

Mini, R.; Prabhu, V.; Vimaladevi, K.; Sowmiya, J.; Sibi, G. published the artcile< GC-MS analysis, phytochemical screening and biological activity of Bauhinia tomentosa (Linn.)>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is Bauhinia tomentosa phytochem screening GCMS analysis.

Present study aimed to evaluate the chem. composition and biol. activity for methanolic extract of Bauhinia tomentosa (Linn.) leaves grown in Western Ghats region of South India. The preliminary phytochem. screening tests revealed the presence of steroids, alkaloids, terpenoids, flavonoids, glycosides and phenolic compounds in the leaf extract A total of 19 compounds were identified through gas chromatog.-mass spectroscopy (GC-MS) anal. of methanolic extract of B. tomentosa. The major compounds identified were phytol (23.96%), n-hexadecanoic acid (11.62%), squalene (8.85%) and the minor compounds are trans-bis(2-methylpropyl)-4,6-dioxane(0.13%), dihydro-cis-α-copaene-8-ol (0.14%), tetradecanoic acid (0.81%), resp. Antibacterial activity of the extract showed the zone of inhibition 18 mm at 200 μg/mL against S. aureus, followed by 15 and 16 mm against S. anginosus, K. pneumoniae at 200 μg/mL, resp. Antioxidant activity of methanolic extract of B. tomentosa leaves showed the maximum IC50 value with 75.07% of scavenging activity at the concentration of 5 μg/mL.

Asian Journal of Chemistry published new progress about Acids Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 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

McCreath, S.; Boinard, P.; Boinard, E.; Gritter, P.; Liggat, J. J. published the artcile< High clarity polyurethane laminating adhesives based on poly(propylene glycol). Effect of hard segment on microphase morphology, haze and adhesion>, Application of C19H34O2, the main research area is polypropylene glycol diisocyanate polyurethane laminating adhesive haze adhesion morphol.

A series of polyurethanes were prepared, with poly(propylene glycol) used as soft-phase due to the high clarity of this polyol and absence of carbonyl functionality, which allows for hard-phase architecture to be resolved with greater resolution In total, eight adhesives were synthesized, each contained a different chain-extender formulation to gauge what influence hard-phase architecture had on laminate haze and peel strength. This was investigated using either 4,4-methylene di-Ph diisocyanate or isophorone diisocyanate as hard-phase with trimethylolpropane as the only chain-extender or by including one of the following sterically hindered diols: 2,2-diethyl-1,3-propane diol, 1,3-butane diol or 1,2-propane diol. DSC anal. showed that microphase morphol. was strongly influenced by the diisocyanate present, as shown by the degree of phase mixing being greater in methylene di-Ph diisocyanate based formulations when compared with isophorone diisocyanate based. This resulted in higher haze values being encountered for both polycarbonate and ethanolamine surface-treated polycarbonate laminates which contained methylene di-Ph diisocyanate based formulations when compared to isophorone diisocyanate based formulations, where all values were <1.5%. International Journal of Adhesion and Adhesives published new progress about Adhesion, physical. 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

Dargo, Gyula; Nagy, Sandor; Kis, David; Bagi, Peter; Matravolgyi, Bela; Toth, Blanka; Huszthy, Peter; Drahos, Laszlo; Kupai, Jozsef published the artcile< Application of Proline-Derived (Thio)squaramide Organocatalysts in Asymmetric Diels-Alder and Conjugate Addition Reactions>, Related Products of 112-63-0, the main research area is hydroxyethyl nitro phenyl tetracyclic compound preparation enantioselective; anthracenyl acetaldehyde nitrostyrene Diels Alder reaction proline squaramide organocatalyst; hydroxynaphthoquinonyl keto ester preparation enantioselective; lawsone unsaturated keto ester conjugate addition proline squaramide organocatalyst.

The synthesis of chiral proline-derived squaramide and thiosquaramide organocatalysts I [X = O or S], which are capable of the dual activation in asym. reactions is reported. The (thio)squaramide moiety can form hydrogen bonds to activate the substrates and to stereocontrol the reaction, while the pyrrolidine unit can form enamines to activate carbonyl compounds via aminocatalysis. Comparing the performance of thiosquaramide to squaramide, the Diels-Alder reaction of (anthracen-9-yl)acetaldehyde and trans-beta-nitrostyrene (E)-RC6H4CH=CHNO2 [R = H, Br, OMe] was examined, which has been investigated in the literature using quantum chem. calculations Both squaramide and thiosquaramide gave excellent yields (up to 99%) and enantiomeric excess values (up to 98%). Moreover, their catalytic performance was compared in conjugate addition of lawsone to 2-oxo-4-phenyl-but-3-enoic acid Et ester.

Synthesis published new progress about Conjugate addition reaction catalysts, stereoselective. 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

Condie, Allison G.; Gerson, Stanton L.; Miller, Robert H.; Wang, Yanming published the artcile< Two-Photon Fluorescent Imaging of Myelination in the Spinal Cord>, Safety of (9Z,12Z)-Methyl octadeca-9,12-dienoate, the main research area is spinal cord myelination demyelination myelin two photon fluorescent imaging; myelin two photon fluorescent imaging Case Imaging Compound preparation.

Myelination is a fundamental biol. process in the vertebrate nervous system. Damage to or malformation of myelin can lead to various neurol. diseases; for example, demyelination in the spinal cord is a major cause of paralysis of patients suffering from multiple sclerosis and related diseases. The ability to directly track myelin levels in the spinal cord is needed in order to assess the efficacy of therapeutics in promoting myelin repair. To address this unmet need, 4-((E)-4-((E)-4-aminostyryl)-2,5-dimethoxystyryl)-N-methylaniline, known as Case Imaging Compound (CIC), has been developed as a myelin-targeted fluorescent imaging agent that selectively binds to myelin. CIC was synthesized via an improved route and evaluated as a fluorescent probe for two-photon fluorescent imaging of myelin in the spinal cord in both demyelinated and dysmyelinated models. In vitro and ex vivo tissue staining both suggest that CIC selectively binds to in animal models. Further evaluation in animal models indicated that CIC is sensitive to differences in myelin content in healthy vs. pathol. myelin. CIC could potentially be useful in the development and evaluation of novel therapies for multiple sclerosis and other demyelinating diseases.

ChemMedChem published new progress about Demyelination. 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

Fort-Aznar, Laura; Ugbode, Chris; Sweeney, Sean T. published the artcile< Retrovirus reactivation in CHMP2BIntron5 models of frontotemporal dementia>, COA of Formula: C19H34O2, the main research area is frontotemporal dementia ALS retrovirus reactivation reverse transcriptase CHMP2B; Drosophila ; gypsy ; amyotrophic lateral sclerosis; frontotemporal dementia; retrovirus.

Frontotemporal dementia (FTD) is the second most prevalent form of pre-senile dementia after Alzheimer′s disease. Amyotrophic lateral sclerosis (ALS) can overlap genetically, pathol. and clin. with FTD indicating the two conditions are ends of a spectrum and may share common pathol. mechanisms. FTD-ALS causing mutations are known to be involved in endosomal trafficking and RNA regulation. Using an unbiased genome-wide genetic screen to identify mutations affecting an FTD-ALS-related phenotype in Drosophila caused by CHMP2BIntron5 expression, we have uncovered repressors of retrovirus (RV) activity as modifiers of CHMP2BIntron5 toxicity. We report that neuronal expression of CHMP2BIntron5 causes an increase in the activity of the endogenous Drosophila RV, gypsy, in the nervous system. Genetically blocking Drosophila gypsy activation and pharmacol. inhibiting viral reverse transcriptase activity prevents degenerative phenotypes observed in fly and rat neurons. These findings directly link endosomal dysfunction to RV de-repression in an FTD-ALS model without TDP-43 pathol. These observations may contribute an understanding to previous discoveries of RV activation in ALS affected patients.

Human Molecular Genetics published new progress about Amyotrophic lateral sclerosis. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, COA of Formula: C19H34O2.

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

Easmon, Johnny; Puerstinger, Gerhard; Heinisch, Gottfried; Fiebig, Hans H.; Roth, Thomas; Hofmann, Johann published the artcile< Synthesis, Cytotoxic, and Antitumor Activities of 2-Pyridylhydrazones Derived from 3-Benzoylpyridazines>, Application In Synthesis of 112-63-0, the main research area is pyridylhydrazone preparation anticancer; pyridylhydrazine benzoylpyridazine condensation; 3-Benzoylpyridazine 2′-pyridylhydrazones; Antitumor activity; Colony forming assay; Cytotoxic activity.

A series of 2-pyridylhydrazones derived from phenyl-pyridazin-3-yl-methanones were prepared in search for potential novel antitumor agents. The stereochem. of these compounds was established by means of NMR spectroscopy. Whereas hydrazones derived from 3-benzoylpyridazines (IC50 = 0.99-8.74 μM) inhibited the proliferation of the tumor cell lines tested, the non-fully aromatic 3-benzoylpyridazinone hydrazones (IC50 > 10 μM) turned out to be inactive. Compounds I (R = H, R1 = OMe, IC50 = 0.12 μM) and I (R = OMe, R1 = H, IC50 = 0.18 μM) exert high cytotoxic activities in clonogenic assays involving human tumor cells of different tissue origins. In vivo application of compound I (R = H, R1 = OMe, 300 mg/kg/day) resulted in a 66% reduction in tumor burden.

Archiv der Pharmazie (Weinheim, Germany) published new progress about Antitumor agents. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Application In Synthesis of 112-63-0.

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