Month: December 2022

El Hassani, Fatima Zahra published the artcileEffect of Olive Mill Wastewater on the composition of the essential oil of bergamot-mint under semi-arid climate, Application In Synthesis of 103-26-4, the publication is Industrial Crops and Products (2022), 114487, database is CAplus.

In this work, we investigate the changes in Mentha aquatica var. citrata (bergamot-mint) characteristics and essential oil composition regarding the modification of the amended dose of Olive Mill Wastewater (OMW) in pots at three different doses; D₁ = 9 mL/100 g, D₂ = 22.5 mL/100 g and D₃ = 54 mL/100 g of soil, seven months before plantation of bergamot-mint cuttings. OMW application didn′t affect plant biomass production (leaves, stems, roots) and chlorophylls in the leaf, while the amount of leaf phenols showed a dose dependent increase. Bergamot-mint essential oil major compound is linalool acetate for control, trans-pulegol when OMW is applied at 9 mL/100 g, isopulegyl acetate when OMW is applied at 22.5 mL/100 g, and verbenone when OMW is applied at 54 mL/100 g. When OMW was applied to soil at doses D₁, D₂ and D₃, some of bergamot-mint essential oil compounds such as decanone, citronellol, piperitone epoxide, guaiacol acetate, Me cinnamate and citronellyl propanoate, totally disappeared. OMW spreading at 9 mL/100 g allowed appearance of menthone in Mentha aquatica var. citrata essential oil while menthol and terpineol appeared only when OMW was applied at the high dose 54 mL/100 g.

Industrial Crops and Products published new progress about 103-26-4. 103-26-4 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester,Protease,Tyrosinase,Natural product, name is Methyl 3-phenyl-2-propenoate, and the molecular formula is C10H10O2, Application In Synthesis of 103-26-4.

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

Dong, Xing published the artcileEnantioselective hydrogenation of tiglic acid in methanol and in dense carbon dioxide catalyzed by a ruthenium-BINAP complex substituted with OCF₃ groups, Formula: C22H12F6O6S2, the publication is Journal of Molecular Catalysis A: Chemical (2004), 211(1-2), 73-81, database is CAplus.

A fluorinated analog of the 2,2′-bis(diphenylphosphino)-1,1′-binaphthyl (BINAP) ligand was synthesized with OCF₃-substitution of the aryl groups in BINAP skeleton (p-OCF₃-BINAP). Ruthenium complexes of both BINAP (Ru-BINAP) and (p-OCF₃)-BINAP (Ru-[(p-OCF₃)-BINAP]) were also synthesized and investigated as catalysts for hydrogenation of tiglic acid in methanol. Typically, Ru-[(p-OCF₃)-BINAP] had lower activity but had higher enantioselectivity at high hydrogen pressures than Ru-BINAP at the same condition. The effect of OCF₃ groups on the catalytic properties was discussed on the basis of NMR spectra and kinetic data. Ru-[(p-OCF₃)-BINAP] was found to have sufficiently high solubility in dense CO₂ for homogeneous catalytic reactions and was investigated for hydrogenation of tiglic acid in CO₂. The results showed that CO₂ had a great influence on both activity and enantioselectivity. Addition of methanol to CO₂ was found to increase the enantioselectivity.

Journal of Molecular Catalysis A: Chemical 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, Formula: C22H12F6O6S2.

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

Hansen, Stinne W. published the artcileIdentification of a New Class of Selective Excitatory Amino Acid Transporter Subtype 1 (EAAT1) Inhibitors Followed by a Structure-Activity Relationship Study, Application of Methyl 2-(3-formyl-4-hydroxyphenyl)acetate, the publication is Journal of Medicinal Chemistry (2016), 59(19), 8757-8770, database is CAplus and MEDLINE.

Screening of a small compound library at three excitatory amino acid transporter subtypes 1-3 (EAAT1-3) subtypes resulted in the identification of compound (I) that exhibited a distinct preference as an inhibitor at EAAT1 (IC₅₀ 20 μM) compared to EAAT2 and EAAT3 (IC₅₀ > 300 μM). This prompted us to subject I to an elaborate structure-activity-relationship study through the purchase and synthesis and subsequent pharmacol. characterization of a total of 36 analogs. Although this effort did not result in analogs with substantially improved inhibitory potencies at EAAT1 compared to that displayed by the hit, it provided a detailed insight into structural requirements for EAAT1 activity of this scaffold. The discovery of this new class of EAAT1-selective inhibitors not only supplements the currently available pharmacol. tools in the EAAT field, but also substantiates the notion that EAAT ligands not derived from α-amino acids hold considerable potential in terms of subtype-selective modulation.

Journal of Medicinal Chemistry published new progress about 61874-04-2. 61874-04-2 belongs to esters-buliding-blocks, auxiliary class Benzene,Phenol,Ester,Aldehyde, name is Methyl 2-(3-formyl-4-hydroxyphenyl)acetate, and the molecular formula is C10H10O4, Application of Methyl 2-(3-formyl-4-hydroxyphenyl)acetate.

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

Gencoglu, Turkan published the artcileA Water Soluble, Low Migration, and Visible Light Photoinitiator by Thioxanthone-Functionalization of Poly(ethylene glycol)-Containing Poly(β-amino ester), Safety of Trimethylolpropane triacrylate, the publication is Macromolecular Chemistry and Physics (2022), 223(13), 2100450, database is CAplus.

A novel photoinitiator (PI) is described here for low ecol. impact, p(PEGDA575-TX): It is water soluble, polymerizable, thioxanthone (TX) functional, and is a one-component poly(ethylene glycol)-based poly(β-amino ester). The PI is synthesized in one step via classical aza-Michael addition reaction between poly(ethylene glycol) diacrylate (Mn = 575 D) and amine functionalized TX (2-(2-aminoethoxy)-9H-thioxanthen-9-one). It absorbs at ≈ 404 nm (ε = 14 000-44 309) in water and can photodecompose with or without additives such as Et 4-(dimethylamino)benzoate (EDB) and bis-(4-tert-butylphenyl)-iodonium hexafluorophosphate (Iod). Although it is an effective one-component visible light PI for free radical polymerization of di- and tri(meth)acrylates, EDB or Iod will be favorable for synergistic effect. p(PEGDA575-TX) has higher initiating reactivity, reducing ability of oxygen inhibition and migration stability compared to TX, which make it environmental friendly.

Macromolecular Chemistry and Physics 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, Safety of Trimethylolpropane triacrylate.

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

Gencoglu, Turkan published the artcileA Water Soluble, Low Migration, and Visible Light Photoinitiator by Thioxanthone-Functionalization of Poly(ethylene glycol)-Containing Poly(β-amino ester), Computed Properties of 10287-53-3, the publication is Macromolecular Chemistry and Physics (2022), 223(13), 2100450, database is CAplus.

A novel photoinitiator (PI) is described here for low ecol. impact, p(PEGDA575-TX): It is water soluble, polymerizable, thioxanthone (TX) functional, and is a one-component poly(ethylene glycol)-based poly(β-amino ester). The PI is synthesized in one step via classical aza-Michael addition reaction between poly(ethylene glycol) diacrylate (Mn = 575 D) and amine functionalized TX (2-(2-aminoethoxy)-9H-thioxanthen-9-one). It absorbs at ≈ 404 nm (ε = 14 000-44 309) in water and can photodecompose with or without additives such as Et 4-(dimethylamino)benzoate (EDB) and bis-(4-tert-butylphenyl)-iodonium hexafluorophosphate (Iod). Although it is an effective one-component visible light PI for free radical polymerization of di- and tri(meth)acrylates, EDB or Iod will be favorable for synergistic effect. p(PEGDA575-TX) has higher initiating reactivity, reducing ability of oxygen inhibition and migration stability compared to TX, which make it environmental friendly.

Macromolecular Chemistry and Physics published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, Computed Properties of 10287-53-3.

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

Gencoglu, Turkan published the artcilePhotoinitiating systems based on poly(ethylene imine) for Michael addition and free radical photopolymerization, Application of Ethyl 4-dimethylaminobenzoate, the publication is Journal of Photochemistry and Photobiology, A: Chemistry (2021), 112959, database is CAplus.

Multifunctional polymeric photoinitiators with the ability of aza-Michael addition with acrylates, free radical polymerization of (meth)acrylates through type II photoinitiation and charge transfer complex (CTC) formation with iodonium salt (Iod) were prepared They were synthesized via aza-Michael addition reaction between branched poly(ethylene imine) (PEI, M_n =1800 g/mol), 2-acryloyloxy thioxanthone and tetra-Et vinylidene bisphosphonate or di-Et vinylphosphonate. Their structures were confirmed by ¹H NMR and FTIR spectroscopy. CTC formation between Iod (acceptor) and amines on PEI (donor) was confirmed by absorption shift to 440 nm in spectral anal. Photopolymerization kinetics were monitored by real time FTIR upon visible light exposure using LED @405 nm, whereas Michael addition reactivities of the photoinitiators were monitored without irradiation Excellent polymerization initiating performances were found and high final conversions were obtained. Results show that the CTCs formed at high concentrations of low-functionalized PEI allow polymerizations without light and increase polymerization efficiencies of Type II photoinitiation.

Journal of Photochemistry and Photobiology, A: Chemistry published new progress about 10287-53-3. 10287-53-3 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Ester, name is Ethyl 4-dimethylaminobenzoate, and the molecular formula is C11H15NO2, Application of Ethyl 4-dimethylaminobenzoate.

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

Nicolaou, K. C. published the artcileImproved Total Synthesis of Tubulysins and Design, Synthesis, and Biological Evaluation of New Tubulysins with Highly Potent Cytotoxicities against Cancer Cells as Potential Payloads for Antibody-Drug Conjugates, Category: esters-buliding-blocks, the publication is Journal of the American Chemical Society (2018), 140(10), 3690-3711, database is CAplus and MEDLINE.

Improved, streamlined total syntheses of natural tubulysins such as V and U, I (R = β-OH, β-OAc, resp.), and pretubulysin D I (R = H), and their application to the synthesis of designed tubulysin analogs, are described. Cytotoxicity evaluation of the synthesized compounds against certain cancer cell lines revealed a number of novel analogs with exceptional potencies [e.g., II: IC₅₀ = 40 pM against MES SA (uterine sarcoma) cell line; IC₅₀ = 6 pM against HEK 293T (human embryonic kidney cancer) cell line; and IC₅₀ = 1.54 nM against MES SA DX (MES SA with marked multidrug resistance) cell line]. These studies led to a set of valuable structure-activity relationships that provide guidance to further mol. design, synthesis, and biol. evaluation studies. The extremely potent cytotoxic compounds discovered in these investigations are highly desirable as potential payloads for antibody-drug conjugates and other drug delivery systems for personalized targeted cancer chemotherapies.

Journal of the American Chemical Society published new progress about 251320-63-5. 251320-63-5 belongs to esters-buliding-blocks, auxiliary class Aliphatic Chain, name is (S)-tert-Butyl (1-hydroxy-3-methylbutan-2-yl)(methyl)carbamate, and the molecular formula is C11H23NO3, Category: esters-buliding-blocks.

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

Rephaeli, Ada published the artcileThe selectivity and anti-metastatic activity of oral bioavailable butyric acid prodrugs, COA of Formula: C10H18O4, the publication is Investigational New Drugs (2006), 24(5), 383-392, database is CAplus and MEDLINE.

Acyloxyalkyl ester prodrugs of histone deacetylase inhibitors, a family of anti-cancer agents, are metabolized intracellularly to acids and aldehyde(s). The purpose of this study was to assess the in vitro and in vivo anticancer activity, selectivity and oral bioavailability of these prodrugs. The prodrugs exhibited a hierarchal potency of AN-193 ≥ AN-7 > AN-1 and AN-9 ≫ AN-10 against murine lung carcinoma (3LLD122) and human breast carcinoma (MCF-7) cell lines. AN-9, and to even greater extent AN-7, displayed preferential cytotoxicity against leukemic and glioblastoma cells compared to their normal cellular counterparts-normal mononuclear and astrocytes cells, resp. In vivo, anti-metastatic activity was evaluated in a metastatic model of lung cancer in which Lewis lung carcinoma (3LLD122) cells are injected i.v. into C57/BL mice and produce lung nodules. The prodrugs administered orally demonstrated a significant inhibition of lung-lesion formation and their hierarchal potency concurred with that observed in vitro, with the exception of AN-193 that was the least active compound Escalating doses of AN-7 (5-100 mg/kg), administered by oral or i.p. routes and displayed equivalent anti-metastatic activities, confirmed the good oral bioavailability of AN-7. Consistent with these findings, a time course study of histone acetylation in s.c. implanted 3LL122 tumors showed 2-4 fold increases in histone acetylation within 0.5 h of i.v., i.p., or oral administration of AN-7 (100 mg/kg). Relative contributions of the prodrug metabolites to the anti-neoplastic activity and the best candidate for clin. studies are discussed.

Investigational New Drugs published new progress about 122110-53-6. 122110-53-6 belongs to esters-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Ester,Inhibitor, name is (Pivaloyloxy)methyl butyrate, and the molecular formula is C10H18O4, COA of Formula: C10H18O4.

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

Ito, Katsuji published the artcileEnantioselective conjugate addition of diethylzinc to acyclic enones using a copper phosphino-phenol complex as catalyst, Formula: C22H12F6O6S2, the publication is Tetrahedron Letters (2005), 46(23), 3981-3985, database is CAplus.

The designed phosphino-phenols I (R = Et, i-Pr, n-Bu, i-Bu, Ph) was found to be an efficient chiral auxiliary for copper-mediated asym. conjugate addition of diethylzinc to acyclic enones. High enantioselectivity was achieved in the reaction of acyclic α,β-enones.

Tetrahedron Letters 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, Formula: C22H12F6O6S2.

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

Nishikawa, Riho published the artcileCrystallinity enhancement of extruded polypropylene containing poly(vinyl alcohol) fibers prepared in situ, Safety of Tris(2,4-di-tert-butylphenyl) phosphite, the publication is Polymer (2022), 125043, database is CAplus.

The present paper describes a novel method for reinforcing isotactic polypropylene (PP) by adding poly(vinyl alc.) (PVA) fibers prepared by melt-stretching. Low-viscosity PVA droplets were deformed into fibers in the molten PP by melt-stretching them beyond the m.p. of PVA. When the obtained composite was extruded below the m.p. of PVA, the fibers became oriented toward the flow direction. The PVA demonstrated marked nucleating activity with regard to PP crystallization, which was further promoted by enlargement of the surface area by fibrillization. As a result, there was virtually no orientation relaxation of the PP chains with an increase in crystallinity, which explains the improvement in rigidity of the reinforced composite.

Polymer published new progress about 31570-04-4. 31570-04-4 belongs to esters-buliding-blocks, auxiliary class Mono-phosphine Ligands, name is Tris(2,4-di-tert-butylphenyl) phosphite, and the molecular formula is C42H63O3P, Safety of Tris(2,4-di-tert-butylphenyl) phosphite.

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