Tag: M.W=100-150

Anadon, Arturo published the artcileFlavouring Group Evaluation 8, Revision 2 (FGE.08Rev2): aliphatic and alicyclic mono-, di-, tri-, and polysulphides with or without additional oxygenated functional groups from chemical groups 20 and 30, Recommanded Product: Ethyl 2-mercaptopropanoate, the publication is EFSA Journal (2010), 8(11), 1408, 124 pp., database is CAplus.

The Scientific Panel on Food Contact Materials, Enzymes, Flavorings and Processing Aids has been requested to evaluate 67 flavoring substances in the Flavoring Group Evaluation 8, Revision 2 (FGE.08Rev2), using the Procedure as referred to in the Commission Regulation (EC) No 1565/2000. These 67 flavoring substances belong to chem. groups 20 and 30, Annex I of the Commission Regulation (EC) No 1565/2000. Final evaluation of the materials of commerce cannot be performed for 40 of the 67 substances, pending further information. The remaining 27 flavoring substances evaluated through the Procedure [FL-no: 12.096, 12.099,12.103, 12.111, 12.117, 12.124, 12.125, 12.127, 12.129, 12.136, 12.151, 12.152, 12.158, 12.165, 12.166, 12.181, 12.183, 12.189, 12.191, 12.196, 12.200, 12.205, 12.221, 12.277, 15.081, 15.103 and 15.111] would present no safety concern at the levels of intake estimated on the basis of the MSDI approach.

EFSA Journal 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, Recommanded Product: Ethyl 2-mercaptopropanoate.

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

Anadon, Arturo published the artcileFlavouring Group Evaluation 8, Revision 1 (FGE.08Rev1): aliphatic and alicyclic mono-, di-, tri-, and polysulphides with or without additional oxygenated functional groups from chemical groups 20 and 30, Computed Properties of 19788-49-9, the publication is EFSA Journal (2010), 8(7), 1021, 123 pp., database is CAplus.

The Scientific Panel on Food Contact Materials, Enzymes, Flavorings and Processing Aids has been requested to evaluate 66 flavoring substances in the Flavoring Group Evaluation 8, Revision 1 (FGE.08Rev1), using the Procedure as referred to in the Commission Regulation (EC) No 1565/2000. These 66 flavoring substances belong to chem. groups 20 and 30, Annex I of the Commission Regulation (EC) No 1565/2000. Generally, the candidate substances and supporting substances are expected to share common routes of absorption, distribution and metabolism, and exhibit similar toxicol. properties.

EFSA Journal 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, Computed Properties of 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

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

Ferrara, Francesca published the artcileDimethyl Fumarate-Loaded Transethosomes: A Formulative Study and Preliminary Ex Vivo and In Vivo Evaluation., Application of Dimethyl fumarate, the publication is International journal of molecular sciences (2022), 23(15), database is MEDLINE.

In this study, transethosomes were investigated as potential delivery systems for dimethyl fumarate. A formulative study was performed investigating the effect of the composition of transethosomes on the morphology and size of vesicles, as well as drug entrapment capacity, using cryogenic transmission electron microscopy, photon correlation spectroscopy, and HPLC. The stability of vesicles was evaluated, both for size increase and capability to control the drug degradation. Drug release kinetics and permeability profiles were evaluated in vitro using Franz cells, associated with different synthetic membranes. The in vitro viability, as well as the capacity to improve wound healing, were evaluated in human keratinocytes. Transmission electron microscopy enabled the evaluation of transethosome uptake and intracellular fate. Based on the obtained results, a transethosome gel was further formulated for the cutaneous application of dimethyl fumarate, the safety of which was evaluated in vivo with a patch test. It was found that the phosphatidylcholine concentration affected vesicle size and lamellarity, influencing the capacity to control dimethyl fumarate’s chemical stability and release kinetics. Indeed, phosphatidylcholine 2.7% w/w led to multivesicular vesicles with 344 nm mean size, controlling the drug’s chemical stability for at least 90 days. Conversely, phosphatidylcholine 0.9% w/w resulted in 130 nm sized unilamellar vesicles, which maintained 55% of the drug over 3 months. These latest kinds of transethosomes were able to improve wound healing in vitro and were easily internalised by keratinocytes. The selected transethosome gel, loading 25 mg/mL dimethyl fumarate, was not irritant after cutaneous application under occlusion, suggesting its possible suitability in the treatment of wounds caused by diabetes mellitus or peripheral vascular diseases.

International journal of molecular sciences published new progress about 624-49-7. 624-49-7 belongs to esters-buliding-blocks, auxiliary class Inhibitor,Natural product, name is Dimethyl fumarate, and the molecular formula is C6H8O4, Application of Dimethyl fumarate.

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

Thirunavukkarasu, M. published the artcileTheoretical conformations studies on 2-Acetyl-gamma-butyrolactone structure and stability in aqueous phase and the solvation effects on electronic properties by quantum computational methods, Application of 3-Acetyldihydrofuran-2(3H)-one, the publication is Computational & Theoretical Chemistry (2022), 113534, database is CAplus.

The 2-Acetyl-gamma-butyrolactone (2-AgBL) was characterized by quantum computational studies with DFT approaches. A relaxed PES scan was employed in this study to determine the order of stability conformations in the vacuum and aqueous phases, and then dimerization for the stable conformer was done in water phase. The mol. structure and geometries of monomer, as well as a dimer for the stable conformer were obtained, and they were confirmed by theor. IR spectroscopy. The ELF, LOL, QTAIM and NCI-RDG techniques are utilized to explore weak donor strong acceptor (C-H···O=C) type hydrogen bonds and other non-covalent interactions in dimer. The stability of compound was internally assessed by the NBO anal. in different mediums. On the gas and solvent phases: UV-Vis absorptions, Mol. Electrostatic potentials, global reactive parameters (FMOs), and Fukui Functions anal. were also performed in this study. A Solute-solvent interaction center was found in the water solvent for 2-AgBL.

Computational & Theoretical Chemistry published new progress about 517-23-7. 517-23-7 belongs to esters-buliding-blocks, auxiliary class Tetrahydrofuran,Ketone,Ester, name is 3-Acetyldihydrofuran-2(3H)-one, and the molecular formula is C3H9ClOS, Application of 3-Acetyldihydrofuran-2(3H)-one.

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

Dehmlow, Eckehard V. published the artcileApplications of phase transfer catalysis. Part 13. Phase-transfer-catalyzed hydrolysis reactions, Related Products of esters-buliding-blocks, the publication is Journal of Chemical Research, Synopses (1979), 238-9, database is CAplus.

The phase-transfer-catalyzed saponifications of esters with 50% aqueous NaOH were studied. The effect of solvent, type of ester, and type of catalyst on the saponifications was determined The rate of saponification of EtO₂C(CH₂)₄CO₂Et catalyzed by Aliquat 336 in several solvents decreased in the order: light petroleum > C₆H₆ ∼ Et₂O ≫ CH₂Cl₂. Accelerations produced by phase-transfer catalysis were greatest for very lipophilic anions such as adipate, benzoate, and acetate. The influence of the catalysts on interfacial tensions was determined Anionic and neutral surfactants are very efficient catalysts for the saponifications

Journal of Chemical Research, Synopses published new progress about 5340-78-3. 5340-78-3 belongs to esters-buliding-blocks, auxiliary class Aliphatic Chain, name is Ethyltert-butylacetate, and the molecular formula is C8H16O2, Related Products of esters-buliding-blocks.

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

Platts, Michelle Y. published the artcileA concise synthesis of HIV integrase inhibitors bearing the dipyridone acid motif, Formula: C7H13NO2, the publication is Tetrahedron Letters (2011), 52(4), 512-514, database is CAplus.

An efficient route to dipyridone acid HIV integrase inhibitors is developed. The key steps include a one-pot three-step formation of the core template (containing one point of structural diversity) followed by a regioselective benzylation and in situ deprotection to afford the title compounds

Tetrahedron Letters published new progress about 924-99-2. 924-99-2 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Amine,Aliphatic hydrocarbon chain,Ester, name is Ethyl 3-(dimethylamino)acrylate, and the molecular formula is C7H13NO2, Formula: C7H13NO2.

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

Garcia Ruano, Jose L. published the artcileHighly Stereoselective Aldol Reactions of Lithium Ester Enolates with (R_S)-2-(p-Tolylsulfinyl)cyclohexanones, Application In Synthesis of 5340-78-3, the publication is Journal of Organic Chemistry (1996), 61(26), 9462-9470, database is CAplus.

Aldol reactions of lithium alkyl acetates (LiCRR”CO₂R’) with (R_S)-2-(p-tolylsulfinyl)cyclohexanone (1) (as an epimeric mixture at C-2) take place with very efficient control of the configuration at the tertiary hydroxylic carbon (C-1). Stereoselectivity becomes complete if R and/or R” are not hydrogen. Only carbinols derived from the (S₂,R_S)-1 epimer were obtained, the major ones being those exhibiting the S configuration (opposite to that of the sulfur) at the hydroxylic carbon. When LiCHRCO₂R’ is used, mixtures of the two epimers at the new stereogenic center C-1′ are obtained (∼10-82% de), their proportion being dependent on the size of R. The use of lactone enolates avoids the formation of epimeric mixtures, affording only one diastereoisomer with an (R_3′,S₁,S₂,R_S) configuration at the four adjacent chiral centers. Tricoordinated lithium species, which involve the enolate and the sulfinyl and carbonyl oxygens of the substrates, are invoked to explain the stereoselectivity observed in these aldol reactions with sulfinyl ketones as electrophiles.

Journal of Organic Chemistry published new progress about 5340-78-3. 5340-78-3 belongs to esters-buliding-blocks, auxiliary class Aliphatic Chain, name is Ethyltert-butylacetate, and the molecular formula is C8H16O2, Application In Synthesis of 5340-78-3.

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

Zanghì, Aurora published the artcileReal world comparison of teriflunomide and dimethyl fumarate in naïve relapsing multiple sclerosis patients: Evidence from the Italian MS register., COA of Formula: C6H8O4, the publication is Multiple sclerosis and related disorders (2022), 103489, database is MEDLINE.

BACKGROUND: Teriflunomide (TERI) and dimethyl fumarate (DMF) are licensed as first-line disease-modifying treatments (DMTs) for relapsing remitting Multiple Sclerosis (RRMS) and are largely replacing injectable DMTs. METHODS: All RRMS patients starting TERI or DMF between January 1, 2013, and December 31, 2017, were included in the analysis. Time to first relapse, time to confirmed disability progression (CDP), and time to DMT discontinuation have been investigated. Propensity score with inverse probability treatment weighting (IPTW-PS) was used to adjust comparisons for baseline confounders. The aim of the study was to compare the effectiveness, and rate of discontinuation of TERI and DMF as first therapeutic choice in the Italian MS register. RESULTS: A total of 683 patients were considered for the analyses, 185 on TERI and 498 on DMF. Patients on TERI had higher number of relapses (2.3 ± 1.4 vs 1.9 ± 1.1, p=.033) and higher baseline disability level assessed by Expanded Disability Status Scale (EDSS) (2.0, interquartile range-IQR 1.0-3.0 vs 1.5, IQR 1.0-2.0, p=.013). IPTW adjusted Cox models did not reveal any difference between the investigated DMTs for the investigated outcomes. CONCLUSIONS: TERI and DMF have similar effectiveness and rate of discontinuation when employed as first therapeutic choice in RRMS patients.

Multiple sclerosis and related disorders published new progress about 624-49-7. 624-49-7 belongs to esters-buliding-blocks, auxiliary class Inhibitor,Natural product, name is Dimethyl fumarate, and the molecular formula is C14H12O2, COA of Formula: C6H8O4.

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