Month: November 2022

Anadon, Arturo published the artcileScientific opinion on Flavouring Group Evaluation 20, Revision 2 (FGE.20Rev2): benzyl alcohols, benzaldehydes, a related acetal, benzoic acids, and related esters from chemical groups 23 and 30, Safety of 3-Methylbut-2-en-1-yl benzoate, the publication is EFSA Journal (2010), 8(7), 1405, 136 pp., database is CAplus.

The Scientific Panel on Food Contact Materials, Enzymes, Flavorings and Processing Aids has been requested to evaluate 41 flavoring substances in the Flavoring Group Evaluation 20, Revision 2 (FGE.20Rev2), using the Procedure as referred to in the Commission Regulation (EC) No 1565/2000. These 41 flavoring substances belong to chem. group 23 and 30, Annex I of the Commission Regulation (EC) No 1565/2000. Generally, 39 candidate substances would present no safety concern at the levels of intake estimated on the basis of the MSDI approach. Notably, information on stereoisomerism has not been specified for two, the final evaluation of the materials of commerce cannot be performed for these two substances, pending further information.

EFSA Journal published new progress about 5205-11-8. 5205-11-8 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester, name is 3-Methylbut-2-en-1-yl benzoate, and the molecular formula is C12H14O2, Safety of 3-Methylbut-2-en-1-yl benzoate.

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

Uranga, Carla C. published the artcileFatty acid esters produced by Lasiodiplodia theobromae function as growth regulators in tobacco seedlings, Name: Isobutyl palmitate, the publication is Biochemical and Biophysical Research Communications (2016), 472(2), 339-345, database is CAplus and MEDLINE.

The Botryosphaeriaceae are a family of trunk disease fungi that cause dieback and death of various plant hosts. This work sought to characterize fatty acid derivatives in a highly virulent member of this family, Lasiodiplodia theobromae. NMR and gas chromatog.-mass spectrometry of an isolated compound revealed (Z, Z)-9,12-Et octadecadienoate, (trivial name Et linoleate), as one of the most abundant fatty acid esters produced by L. theobromae. A variety of naturally produced esters of fatty acids were identified in Botryosphaeriaceae. In comparison, the production of fatty acid esters in the soil-borne tomato pathogen Fusarium oxysporum, and the non-phytopathogenic fungus Trichoderma asperellum was found to be limited. Et linoleate, Et hexadecanoate (trivial name Et palmitate), and Et octadecanoate, (trivial name Et stearate), significantly inhibited tobacco seed germination and altered seedling leaf growth patterns and morphol. at the highest concentration (0.2 mg/mL) tested, while Et linoleate and Et stearate significantly enhanced growth at low concentrations, with both still inducing growth at 98 ng/mL. This work provides new insights into the role of naturally esterified fatty acids from L. theobromae as plant growth regulators with similar activity to the well-known plant growth regulator gibberellic acid.

Biochemical and Biophysical Research Communications published new progress about 110-34-9. 110-34-9 belongs to esters-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Ester, name is Isobutyl palmitate, and the molecular formula is C13H9FO, Name: Isobutyl palmitate.

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

Ursinyova, Nina published the artcileCopper-Catalyzed Borylation of Cyclic Sulfamidates: Access to Enantiomerically Pure (β-and γ-Amino-alkyl)boronic Esters, Recommanded Product: tert-Butyl N-[3-(tetramethyl-1,3,2-dioxaborolan-2-yl)propyl]carbamate, the publication is European Journal of Organic Chemistry (2016), 2016(4), 673-677, database is CAplus.

Cyclic sulfamidates undergo borylation under Cu-catalyzed conditions using B₂pin₂ to give enantiomerically (and diastereomerically) defined (aminoalkyl)boronic esters. External iodide is essential, but the intermediacy of simple alkyl iodides was excluded; N-sulfated intermediates are key in the borylation sequence. Based on stereochem. studies and trapping experiments, the involvement of C-centered radicals under these Cu-catalyzed conditions appears likely.

European Journal of Organic Chemistry published new progress about 1850305-80-4. 1850305-80-4 belongs to esters-buliding-blocks, auxiliary class Boronic acid and ester,Boronic Acids,Boronate Esters, name is tert-Butyl N-[3-(tetramethyl-1,3,2-dioxaborolan-2-yl)propyl]carbamate, and the molecular formula is C5H6BNO3, Recommanded Product: tert-Butyl N-[3-(tetramethyl-1,3,2-dioxaborolan-2-yl)propyl]carbamate.

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

Lunzer, Markus published the artcileBeyond the Threshold: A Study of Chalcogenophene-Based Two-Photon Initiators, Name: Trimethylolpropane triacrylate, the publication is Chemistry of Materials (2022), 34(7), 3042-3052, database is CAplus and MEDLINE.

A series of nine soluble, sym. chalcogenophenes bearing hexyl-substituted triphenylamines, indolocarbazoles, or phenylcarbazoles was designed and synthesized as potential two-photon absorption (2PA) initiators. A detailed photophys. anal. of these mols. revealed good 2PA properties of the series and, in particular, a strong influence of selenium on the 2PA cross sections, rendering these materials especially promising new 2PA photoinitiators. Structuring and threshold tests proved the efficiency and broad spectral versatility of two selenium-containing lead compounds as well as their applicability in an acrylate resin formulation. A comparison with com. photoinitiators Irg369 and BAPO as well as sensitizer ITX showed that the newly designed selenium-based materials TPA-S and TPA-BBS outperform these traditional initiators by far both in terms of reactivity and dose. Moreover, by increasing the ultralow concentration of TPA-BBS, a further reduction of the polymerization threshold can be achieved, revealing the great potential of this series for application in two-photon polymerization (2PP) systems where only low laser power is available.

Chemistry of Materials published new progress about 15625-89-5. 15625-89-5 belongs to esters-buliding-blocks, auxiliary class Polymerization Reagents,Crosslinkers, name is Trimethylolpropane triacrylate, and the molecular formula is C15H20O6, Name: Trimethylolpropane triacrylate.

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

Bellmann-Sickert, Kathrin published the artcilePalmitoylated SDF1α Shows Increased Resistance against Proteolytic Degradation in Liver Homogenates, SDS of cas: 19788-49-9, the publication is ChemMedChem (2011), 6(1), 193-200, database is CAplus and MEDLINE.

The chemokine stromal cell-derived factor-1 α (SDF1 α) is strongly involved in organogenesis, as well as inflammation and tissue repair, and acts by attracting different kinds of stem and progenitor cells. Therefore, it constitutes an interesting compound for drug development in regenerative medicine. However, it is prone to inactivation by proteolytic cleavage in human serum. Accordingly, it has to be stabilized against enzymic degradation for any therapeutic application. We synthesized a palmitoylated SDF1α analog by native chem. ligation. Both the N-terminal thioester and the C-terminal palmitoylated fragment were prepared by solid-phase peptide synthesis. The activity of the refolded and pure compound was determined by an inositol phosphate turnover assay and revealed no loss in receptor activation. Addnl., resistance to proteolytic degradation was investigated in porcine liver homogenates and showed a near sevenfold increased half time. This study is a proof of principle approach for the lipidation of SDF1α and provides a basis for further engineering of the chemokine in order to increase its therapeutic value.

ChemMedChem published new progress about 19788-49-9. 19788-49-9 belongs to esters-buliding-blocks, auxiliary class Thiol,Aliphatic hydrocarbon chain,Ester, name is Ethyl 2-mercaptopropanoate, and the molecular formula is C5H10O2S, SDS of cas: 19788-49-9.

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

Baumann, Lars published the artcilePhotoactivatable Chemokines – Controlling Protein Activity by Light, Formula: C5H10O2S, the publication is Angewandte Chemie, International Edition (2013), 52(36), 9550-9553, database is CAplus and MEDLINE.

The authors rationally designed and prepared a set of photoactivatable stromal cell-derived factor-1α (SDF-1α) analogs by introducing for the first time O-acyl isopeptides into proteins by expressed protein ligation. These compounds were shown to switch into their active conformation after UV treatment and regain biol. activity in several cell-based assays. This straight-forward approach including defined destabilization of protein helixes by depsipeptide segments and self-reorganization of the structure after removal of the photoprotection may be applied to a wide range of middle-sized proteins to study their function under the control of light.

Angewandte Chemie, International Edition published new progress about 19788-49-9. 19788-49-9 belongs to esters-buliding-blocks, auxiliary class Thiol,Aliphatic hydrocarbon chain,Ester, name is Ethyl 2-mercaptopropanoate, and the molecular formula is C5H10O2S, Formula: C5H10O2S.

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

Zhang, Yongqiang published the artcileAchiral Bent-Core Molecules with a Series of Linear or Branched Carbosilane Termini: Dark Conglomerate Phases, Supramolecular Chirality and Macroscopic Polar Order, Product Details of C15H14O3, the publication is Chemistry of Materials (2010), 22(9), 2869-2884, database is CAplus.

New organic-inorganic hybrid materials that combine a bent π-conjugated aromatic core with one linear or branched carbosilane unit have been synthesized and investigated, with respect to their self-assembly in liquid crystalline (LC) phases, by means of polarizing microscopy, differential scanning calorimetry (DSC), X-ray diffraction (XRD), and electro-optical techniques. Most of these achiral compounds show spontaneous symmetry breaking into chiral superstructures that represent conglomerates with macroscopic domains of opposite handedness. These fluid chiral superstructures can be frozen into the glassy state and, for one of the compounds, chirality was switched under the application of a special waveform of an applied external elec. field between two enantiomeric states. This flipping of supramol. chirality occurs between oppositely tilted structures, which represents a new mode of chirality switching. Besides spontaneous chirality, these materials show polar order, leading to ferroelec. (FE) and antiferroelec. (AF) switching modes. For one compound with a highly branched carbosilane unit, a temperature-, voltage-, and frequency-dependent reversible transition from AF switching with inversion of chirality to FE switching with retention of chirality was observed Models were developed to explain the exptl. observations, based on enthalpic and entropic contributions of distinct supermol. arrangements in these soft matter systems.

Chemistry of Materials published new progress about 50670-76-3. 50670-76-3 belongs to esters-buliding-blocks, auxiliary class Benzene,Phenol,Ester, name is Ethyl 4′-hydroxy-[1,1′-biphenyl]-4-carboxylate, and the molecular formula is C7H3BrF3I, Product Details of C15H14O3.

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

Krause, Bernhard M. published the artcileItaCORMs: conjugation with a CO-releasing unit greatly enhances the anti-inflammatory activity of itaconates, Quality Control of 617-52-7, the publication is RSC Medicinal Chemistry (2021), 12(12), 2053-2059, database is CAplus and MEDLINE.

Endogenous itaconate as well as the gasotransmitter CO have recently been described as powerful anti-inflammatory and immunomodulating agents. However, each of the two agents comes along with a major drawback: Whereas itaconates only exert beneficial effects at high concentrations above 100 μM, the uncontrolled application of CO has strong toxic effects. To solve these problems, we designed hybrid prodrugs, i.e. itaconates that are conjugated with an esterase-triggered CO-releasing acyloxycyclohexadiene-Fe(CO)₃ unit (ItaCORMs). Here, we describe the synthesis of different ItaCORMs and demonstrate their anti-inflammatory potency in cellular assays of primary murine immune cells in the low μmolar range (<10 μM). Thus, ItaCORMs represent a promising new class of hybrid compounds with high clin. potential as anti-inflammatory agents.

RSC Medicinal Chemistry published new progress about 617-52-7. 617-52-7 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Aliphatic hydrocarbon chain,Ester, name is Dimethyl itaconate, and the molecular formula is C7H10O4, Quality Control of 617-52-7.

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

Savary, David published the artcileEnantioselective Pd⁰-catalyzed C(sp²)-H arylation for synthesis of chiral warped molecules, Safety of (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate), the publication is Angewandte Chemie, International Edition (2021), 60(10), 5136-5140, database is CAplus and MEDLINE.

C-H activation-based ring-forming methods are a powerful approach for the construction of complex mol. architectures, especially those containing a congested stereo-center. Therefore, this strategy seems perfectly suited to address the synthesis of chiral polycyclic aromatic hydrocarbons (PAHs) and bowl-shaped mols., which are important target mols. in the field of organic electronic materials. Herein, we describe an enantioselective Pd⁰-catalyzed C(sp²)-H arylation protocol for the synthesis of chiral fluoradenes and other warped mols., which could serve to the bottom-up construction of chiral PAHs. The current approach relies on the use of chiral bifunctional phosphine-carboxylate ligands and delivers diverse polycyclic compounds in high yield and with good to excellent enantioselectivity. The chiroptical properties of the obtained products were investigated, and some of them were found to have a strong ellipticity and an emission band located in the visible region.

Angewandte Chemie, International Edition published new progress about 126613-06-7. 126613-06-7 belongs to esters-buliding-blocks, auxiliary class Chiral Diphenols, name is (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate), and the molecular formula is C22H12F6O6S2, Safety of (R)-[1,1′-Binaphthalene]-2,2′-diyl bis(trifluoromethanesulfonate).

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

Wang, Pengxu published the artcileDiscovery of Novel Thiophene-arylamide Derivatives as DprE1 Inhibitors with Potent Antimycobacterial Activities, Name: 3-(Methoxycarbonyl)benzoic acid, the publication is Journal of Medicinal Chemistry (2021), 64(9), 6241-6261, database is CAplus and MEDLINE.

In this study, we report the design and synthesis of a series of novel thiophene-arylamide compounds derived from the noncovalent decaprenylphosphoryl-β-D-ribose 2′-epimerase (DprE1) inhibitor TCA1 through a structure-based scaffold hopping strategy. Systematic optimization of the two side chains flanking the thiophene core led to new lead compounds bearing a thiophene-arylamide scaffold with potent antimycobacterial activity and low cytotoxicity. Compounds I, II, III [X = H,F] exhibited potent in vitro activity against both drug-susceptible (min. inhibitory concentration (MIC) = 0.02-0.12μg/mL) and drug-resistant (MIC = 0.031-0.24μg/mL) tuberculosis strains while retaining potent DprE1 inhibition (half maximal inhibitory concentration (IC₅₀) = 0.2-0.9μg/mL) and good intracellular antimycobacterial activity. In addition, these compounds showed good hepatocyte stability and low inhibition of the human ether-á-go-go related gene (hERG) channel. The representative compound III [X = H] with acceptable pharmacokinetic property demonstrated significant bactericidal activity in an acute mouse model of tuberculosis. Moreover, the mol. docking study of template compound I provides new insight into the discovery of novel antitubercular agents targeting DprE1.

Journal of Medicinal Chemistry published new progress about 1877-71-0. 1877-71-0 belongs to esters-buliding-blocks, auxiliary class Carboxylic acid,Benzene,Ester, name is 3-(Methoxycarbonyl)benzoic acid, and the molecular formula is C9H8O4, Name: 3-(Methoxycarbonyl)benzoic acid.

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