Month: November 2022

Grundler, Verena; Gademann, Karl published the artcile< Direct Arginine Modification in Native Peptides and Application to Chemical Probe Development>, COA of Formula: C19H34O2, the main research area is arginine modification labeling peptide probe development; Chemical biology; drug mechanism of action; drug modification; peptide drugs.

An efficient method for the direct labeling of the Arg guanidinium group in native peptides is reported. This straightforward procedure allows modifying the arginine moiety in peptides with various reporter groups, such as fluorophores, biotin, etc., under mild conditions in an operationally simple procedure. The scope of this method tolerates various functionalized amino acids such as His, Ser, Trp, Tyr, Glu, etc., while the only limitations uncovered so far are restricted to cysteine and free amine residues. The utility of this late-stage diversification method was demonstrated in direct labeling of leuprolide, a clin. used drug, for distribution monitoring in Daphnia, and in labeling of microcystin, a cyanobacterial toxin.

ACS Medicinal Chemistry Letters published new progress about Biotinylation. 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

Kojima, Tomohiro; Ogawa, Takumi; Kitao, Souichiro; Sato, Manabu; Oda, Akifumi; Ohta, Kiminori; Endo, Yasuyuki published the artcile< Estrogenic activity of bis(4-hydroxyphenyl)methanes with cyclic hydrophobic structure>, Reference of 112-63-0, the main research area is preparation hydroxyphenylmethane estrogenic antitumor neoplasm; Carborane; Estrogen receptor; Partial agonist; SERM.

Monoalkylated bis(4-hydroxyphenyl)methanes are reported to show weak binding affinity for estrogen receptor (ER). The authors hypothesized that introduction of appropriately located hydrophobic substituents in these compounds would increase the binding affinity. Indeed, the authors found that bis(4-hydroxyphenyl)methane bearing a 3,3-dimethylcyclohexyl group I shows potent ERα binding affinity, comparable to that of estradiol. Bulkier substituents could be introduced at the 3,3-position without decreasing the affinity. However, the position of the substituents was critical: the 4,4-dimethylcyclohexyl derivative showed very weak binding affinity. The compounds with high ER-binding affinity showed predominantly agonistic activity, together with weak antagonistic activity at high concentration, in cell proliferation assay with human breast cancer cell line MCF-7. Further structure-function studies of these compounds and their derivatives might lead to the development of more selective and potent estrogen receptor modulators.

Bioorganic & Medicinal Chemistry published new progress about Antitumor agents. 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

Sheppard, George S. published the artcile< Copper(II) pivalate/oxone. An improved promoter system for aryl transfer via organo-bismuth reagents>, Formula: C6H10O5, the main research area is aromatic ether preparation; alc arylbismuth arylation copper pivalate catalyst.

Effective conditions for the arylation of OH groups prone to elimination are reported. Modest success was achieved using triarylbismuth reagents under literature conditions. Based on the side-products observed in the reaction, the oxidant used for in-situ oxidation of Bi(III) to Bi(V) and the Cu salt used as promoter were modified. These changes led to substantially improved results.

Synlett published new progress about Aromatic ethers Role: SPN (Synthetic Preparation), PREP (Preparation). 617-55-0 belongs to class esters-buliding-blocks, and the molecular formula is C6H10O5, Formula: C6H10O5.

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

Kojio, Ken; Nozaki, Shuhei; Takahara, Atsushi; Yamasaki, Satoshi published the artcile< Influence of chemical structure of hard segments on physical properties of polyurethane elastomers: a review>, Quality Control of 112-63-0, the main research area is review polyurethane elastomer hard segment phys property.

A review. Hard segments of polyurethanes (PUs) are generally formed from diisocyanate and diol. Diol can be replaced with triol and thiol. These chem. structures of hard segments strongly affect not only a microphase separated structure but mech. properties of resultant PUs. In this review, we focus on the relationship between chem. structure like symmetry and bulkiness of diisocyanate and mech. properties of PU. Then, influence of hard segment content, incorporation of 1,1,1-trimethylol propane with trifunctional groups, and alkyldithiol was reviewed mainly on trans-1,4-bis(isocyanatomethyl) cyclohexane-poly(oxytetramethylene) glycol-based PU.

Journal of Polymer Research published new progress about Isocyanates Role: PRP (Properties). 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

Wang, Zonghua; Zhang, Xiaoran; Yao, Shuo; Zhao, Jiaxin; Zhou, Chuanjian; Wu, Junling published the artcile< Development of low-shrinkage dental adhesives via blending with spiroorthocarbonate expanding monomer and unsaturated epoxy resin monomer>, Electric Literature of 112-63-0, the main research area is spiroorthocarbonate blend epoxy resin monomer antishrinkage physicochem property; Compatibility; Expanding monomer; Polymerization shrinkage; Resin adhesives; Unsaturated epoxy resin monomer.

Polymerization shrinkage is one of the main drawbacks of dental resin adhesives. In this study, spiroorthocarbonate expanding monomer 3,9-diethyl-3,9-dimethylol -1,5,7,11-tetraoxaspiro-[5,5] undecane (DDTU) and unsaturated epoxy resin monomer Diallyl bisphenol A diglycidyl ether (DBDE) were synthesized and utilized as anti-shrinkage-coupling additive of methacrylate-based adhesives. Polymerization process and physicochem. properties including double bond conversion, polymerization shrinkage, compatibility, mech. performance, thermal stability, contact angle, shear bond strength and cytotoxicity were characterized. Results indicated that adhesives containing anti-shrinkage-coupling additive had reduced volume shrinkage, improved compatibility and enhanced shear bond strength. When the amount of additive was 20 wt%, the volume shrinkage was decreased by 45.8% (4.17 ± 0.32%) and the shear bond strength was increased by 49.6% (19.64 ± 0.99 MPa). The results also showed that the use of additive had no adversely affect on double bond conversion and cytotoxicity. Therefore, novel low-shrinkage resin adhesives were prepared via blending with spiroorthocarbonate expanding monomer and unsaturated epoxy resin monomer.

Journal of the Mechanical Behavior of Biomedical Materials published new progress about Adhesives. 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

Khan, M. K. A.; Morgan, K. J.; Morrey, D. P. published the artcile< Carbonyl derivatives of heterocyclic compounds. III. The preparation of 3-acylpyrroles>, SDS of cas: 7126-50-3, the main research area is .

Synthetic routes to 3-acylpyrroles by methods involving ring closure, transformation of substituents, and further substitution of monosubstituted pyrroles were investigated. The condensation of H2NCHCHO with acylpyruvates appears to provide a general route to the 3-ketones. The related condensation of N-carbethoxyglycine ester and nitrile gave poor yields of 3-cyanopyrrole but attempts to obtain the 3-Ac derivative by the use of MeCOCH:CH2 showed the occurrence of an alternative reaction path and gave no useful product. Attempts to convert 3-cyano- and 3-carboxypyrroles into acyl derivatives by the action of nucleophilic reagents were not successful. Pyrrole-3-carboxaldehyde was obtained by decarboxylation of the minor formylation product of Et pyrrole-2-carboxylate. 24 references.

Tetrahedron published new progress about Carbonyl compounds (organic). 7126-50-3 belongs to class esters-buliding-blocks, and the molecular formula is C8H9NO3, SDS of cas: 7126-50-3.

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

Larcher, Adele; Nocentini, Alessio; Supuran, Claudiu T.; Winum, Jean-Yves; van der Lee, Arie; Vasseur, Jean-Jacques; Laurencin, Danielle; Smietana, Michael published the artcile< Bis-benzoxaboroles: Design, Synthesis, and Biological Evaluation as Carbonic Anhydrase Inhibitors>, Application of C19H34O2, the main research area is dicarboxamide linked benzoxaborole preparation carbonic anhydrase inhibitor.

The synthesis, characterization, and biol. evaluation of a series of compounds incorporating two or three benzoxaborole moieties is reported. Three different synthetic strategies were used to explore within this series as much chem. space as possible, all starting from the 6-aminobenzoxaborole reagent: amide coupling, imine bond formation, and squarate coupling. Eleven new compounds were isolated in pure form, and single crystals were obtained for two of them. These compounds were then evaluated as carbonic anhydrase inhibitors against the cytosolic hCA I and II and the transmembrane hCA IV, IX, and XII isoforms. While the benzoxaborole scaffold has been recently introduced as a new chemotype for carbonic anhydrase inhibition, these new multivalent derivatives exhibited superior inhibitory activity against the tumor-associated isoform hCA IX. In particular, compared to monovalent 6-aminobenzoxaborole (KI = 813 nM) and 6-carboxybenzoxaborole (KI = 400 nM), derivative 2h characterized by a glutamic acid structural core and two benzoxaborole moieties was found to be more potent (KI = 64 nM) and more selective over human hCA II.

ACS Medicinal Chemistry Letters published new progress about Antitumor agents. 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

Lo, Kong Mun; Ng, Seik Weng published the artcile< Di-μ-hydroxido-bis[bromidodi-p-tolyltin(IV)]>, SDS of cas: 112-63-0, the main research area is crystal structure tin tolyl bromo hydroxo dinuclear complex; mol structure tin tolyl bromo hydroxo dinuclear complex; hydrogen bond tin tolyl bromo hydroxo dinuclear complex.

The Sn atoms in dinuclear di-μ-hydroxo-bis[bromodi-p-tolyltin], [Sn2Br2(C7H7)4(OH)2], exist in distorted trigonal-bipyramidal BrSnC2O2 coordination geometries. Each of the 2 independent dinuclear mols. comprising the asym. unit is disposed about a center of inversion. In the crystal, mols. are linked by an O-H···H bond. Crystallog. data are given.

Acta Crystallographica, Section E: Structure Reports Online published new progress about Crystal structure. 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

Wallace, David M.; Leung, Sam H.; Senge, Mathias O.; Smith, Kevin M. published the artcile< Rational tetraarylporphyrin syntheses: tetraarylporphyrins from the MacDonald route>, Name: Ethyl 5-formyl-1H-pyrrole-2-carboxylate, the main research area is tetraarylporphyrin; porphyrin tetraaryl; condensation MacDonald tetraarylporphyrin.

Four new synthetic routes to meso-tetraarylporphyrins using a MacDonald-type [2 + 2] condensation are described. Self-condensation of a 5-aryldipyrromethane, e.g., 5-(4-tolyl)dipyrromethane, with an aryl-substituted one-carbon bridging unit affords a mixture of tetraarylporphyrins due to acid-catalyzed redistribution reactions. The second and third methods presented here show wide applicability for the preparation of 5,10,15,20-tetraaryl-substituted porphyrins, e.g., I, with 2-fold rotational symmetry and involves self-condensation of 5-aryl-1-aryldipyrromethanecarbinols, e.g., II. Finally, the 4th approach involves a [2 + 2] approach in which one of the 2 dipyrromethanes bears both of the bridging carbons in the porphyrin products, affording a porphyrin which possesses 3 different aryl rings, with one pair of uniquely opposite identical aryl groups. The last two [2 + 2] methods are further extended to give a tetraarylporphyrin bearing four different aryl groups in a predesignated array, the structure of which is confirmed by a single-crystal X-ray study.

Journal of Organic Chemistry published new progress about Condensation reaction. 7126-50-3 belongs to class esters-buliding-blocks, and the molecular formula is C8H9NO3, Name: Ethyl 5-formyl-1H-pyrrole-2-carboxylate.

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

Recinella, Lucia; Chiavaroli, Annalisa; Masciulli, Fabrizio; Fraschetti, Caterina; Filippi, Antonello; Cesa, Stefania; Cairone, Francesco; Gorica, Era; De Leo, Marinella; Braca, Alessandra; Martelli, Alma; Calderone, Vincenzo; Orlando, Giustino; Ferrante, Claudio; Menghini, Luigi; Di Simone, Simonetta Cristina; Veschi, Serena; Cama, Alessandro; Brunetti, Luigi; Leone, Sheila published the artcile< Protective Effects Induced by a Hydroalcoholic Allium sativum Extract in Isolated Mouse Heart>, Synthetic Route of 112-63-0, the main research area is ethanol eugenol Allium cardioprotective agent PGE2 COX2 oxidative stress; CIEL*a*b*; HS-SPME/GC–MS; bioinformatics; garlic; inflammation; multimethodological evaluation; oxidative stress.

The aim of the present study was to investigate the possible protective effects of a garlic hydroalcoholic extract on the burden of oxidative stress and inflammation occurring on mouse heart specimens exposed to E. coli lipopolysaccharide (LPS), which is a well-established inflammatory stimulus. Headspace solid-phase microextraction combined with the gas chromatog.-mass spectrometry (HS-SPME/GC-MS) technique was applied to determine the volatile fraction of the garlic powder, and the HS-SPME conditions were optimized for each of the most representative classes of compounds CIEL*a*b* colorimetric analyses were performed on the powder sample at the time of delivery, after four and after eight months of storage at room temperature in the dark, to evaluate the color changing. Freshly prepared hydroalcoholic extract was also evaluated in its color character. Furthermore, the hydroalcoholic extract was analyzed through GC-MS. The extract was found to be able to significantly inhibit LPS-induced prostaglandin (PG) E2 and 8-iso-PGF2α levels, as well as mRNA levels of cyclooxygenase (COX)-2, interleukin (IL)-6, and nuclear factor-kB (NF-kB), in heart specimens. Concluding, our findings showed that the garlic hydroalcoholic extract exhibited cardioprotective effects on multiple inflammatory and oxidative stress pathways.

Nutrients published new progress about Allium sativum. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Synthetic Route of 112-63-0.

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