Esters-buliding-blocks

Zhu, Xiaotao published the artcileProtection of COOH and OH groups in acid, base and salt free reactions, Safety of 3-(Methoxycarbonyl)benzoic acid, the publication is Green Chemistry (2018), 20(7), 1444-1447, database is CAplus.

An iron-catalyzed general functional group protection method with inexpensive reagents was reported. This environmentally benign process did not use acids or bases and did not produce waste products. In most of the cases, purification beyond filtration and evaporation was unnecessary. Protection of carboxylic acids and phenols/alcs. was achieved under mild reaction conditions using Fe(OTf)₃, a Lewis acid catalyst in the absence of any acid, base or salt. Free COOH and OH groups were protected in a one-pot reaction.

Green 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 C11H10O, Safety of 3-(Methoxycarbonyl)benzoic acid.

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

Zhao, Luyang published the artcileIntegration of inherent and induced chirality into subphthalocyanine analogue, Application In Synthesis of 126613-06-7, the publication is Scientific Reports (2016), 28026pp., database is CAplus and MEDLINE.

Conventional conjugated systems are characteristic of only either inherent or induced chirality because of synthetic challenge in combination of chiral segment into the main chromophore. In this work, chiral binaphthyl segment is directly fused into the central chromophore of a subphthalocyanine skeleton, resulting in a novel type of chiral subphthalocyanine analog (R/S)-1 of integrated inherent and induced chirality. Impressively, an obviously enhanced optical activity is discerned for (R/S)-1 mols., and corresponding enhancement mechanism is elucidated in detail. The synthesis strategy based on rational mol. design will open the door towards fabrication of chiral materials with giant optical activity, which will have great potential in chiroptical devices.

Scientific Reports 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 C5H11NO2S, Application In Synthesis of 126613-06-7.

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

Meskova, Michaela published the artcileHighly sterically hindered binaphthalene-based monophosphane ligands: synthesis and application in stereoselective Suzuki-Miyaura reactions, Synthetic Route of 126613-06-7, the publication is Tetrahedron: Asymmetry (2013), 24(15-16), 894-902, database is CAplus.

A series of new sterically hindered (R)-(2′-aryl-1,1′-binaphthalene-2-yl)phosphines with ortho-substituted phenyls as aryl groups were prepared via Negishi monoarylation of enantiopure 2,2′-dibromo-1,1′-binaphthalene followed by lithiation and quenching with diphenylphosphino or dicyclohexylphosphino chloride. These ligands were applied to the stereoselective Suzuki-Miyaura coupling for the preparation of substituted biaryls. The enantioselectivity correlated pos. when increasing the hindrance of the 2′-aryl group of the ligand. Using the best performing diphenylphosphine ligand with a 2,6-dimethoxyphenyl aryl group, various arylnaphthalenes were prepared in high to excellent yields (68-99%) with low to good ee (12-75% ee), the latter being comparable to the best values reported when using other chiral monophosphine ligands.

Tetrahedron: Asymmetry 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, Synthetic Route of 126613-06-7.

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

Kasak, Peter published the artcileElaboration of a novel effective approach to enantiopure functionalized 2,2′-dialkyl-1,1′-binaphthyls by stereoconservative cross-couplings at positions 2 and 2′, Product Details of C22H12F6O6S2, the publication is Tetrahedron Letters (2004), 45(27), 5279-5282, database is CAplus.

The yield and the stereochem. outcome of methylation of chiral 1,1′-binaphthyl-2,2′-dielectrophiles (ditriflate and diiodide) clearly depend on the reactivity of the organometallics used. It was found that only the Negishi reaction of a diiodide allowed direct effective synthesis of non-racemic functionalized C₂-sym. 2,2′-dialkyl-1,1′-binaphthyls I (R = Me, Bn, Et, CH₂CH₂CO₂Me, CH₂CH₂CN).

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, Product Details of C22H12F6O6S2.

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

Kasak, Peter published the artcileStereoconservative cyanation of [1,1′-binaphthalene]-2,2′-dielectrophiles. An alternative approach to homochiral C₂-symmetric [1,1′-binaphthalene]-2,2′-dicarbonitrile and its transformations, HPLC of Formula: 126613-06-7, the publication is Collection of Czechoslovak Chemical Communications (2000), 65(5), 729-740, database is CAplus.

Cyanation of [1,1′-binaphthalene]-2,2′-diiodide and [1,1′-binaphthalene]-2,2′-diyl ditriflate showed reactions with zinc cyanide catalyzed by palladium phosphane complex in DMF to be the most effective procedures with almost complete conservation of stereogenic information by affording a corresponding highly enantiomerically enriched dinitrile (from diiodide in 94% yield, 92% ee). The dinitrile was successfully transformed into [1,1′-binaphthalene]-2,2′-dicarboxylic acid and -2,2′-dicarbaldehyde in high yields (84-87%).

Collection of Czechoslovak Chemical Communications 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, HPLC of Formula: 126613-06-7.

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

Jain, Shubham published the artcilePassion fruit seed extract as an antioxidant additive for biodiesel; shelf life and consumption kinetics, Product Details of C10H12O5, the publication is Fuel (2021), 119906, database is CAplus.

One of the primary concerns in the use of biodiesel is its susceptibility towards radical-mediated oxidative reactions. The presence of unsaturated Me esters renders biodiesel vulnerable to oxidation It necessitates strategic interventions, which among a few others, includes the use of antioxidant additives. Natural antioxidants have multiple significant advantages over their synthetic counterparts. In the present study, the activity of methanolic passion fruit seed (PFS) extract as an antioxidant additive for waste cooking oil (soybean) biodiesel has been evaluated. The PFS extract contained a high proportion of phenolic compounds and exhibited excellent antiradical activity against model radical DPPH, which encouraged us to explore the case of unstable biodiesel further. At a concentration of 200 ppm, the PFS extract augmented the fuel’s resistance towards oxidation to levels where it could comply with European and the Indian specifications for blend-stock biodiesel. The performance of PFS extract was comparable to that of synthetic antioxidants, including butylated hydroxyanisole and butylated hydroxytoluene. The present study substantiates the utility of plant extracts rich in phenolics as an antioxidant additive for biodiesel.

Fuel published new progress about 121-79-9. 121-79-9 belongs to esters-buliding-blocks, auxiliary class Natural product, name is Propyl 3,4,5-trihydroxybenzoate, and the molecular formula is C10H12O5, Product Details of C10H12O5.

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

Tochacek, Jiri published the artcileThe chances of thermooxidation stabilization of poly(3-hydroxybutyrate) during processing-A critical evaluation, Formula: C42H63O3P, the publication is Journal of Applied Polymer Science (2021), 138(27), 50647, database is CAplus.

The performance of a series of thermooxidn. stabilizers was investigated in poly(3-hydroxybutyrate) (PHB) during processing by multiple extrusion at 190°C. The issue was to find out if PHB may be processing stabilized or not. Phenols of different steric hindrance, phosphites, amine oxide, hydroxylamine, lactone, hindered amine and carbodiimide were tested as potential stabilizers and their efficiencies compared with non-stabilized polymer as a reference Multiple extrusion data was evaluated using the processing degradation index (PDI) formerly designed for polypropylene. Changes in mol. weight were monitored as well. The results have shown that none of the stabilizing structures, currently successfully used in other polymers, have the ability to protect PHB. This indirectly implies that no radical chain scission takes place during PHB processing, i.e. no thermooxidn. takes place. Moreover, nearly all of the tested structures act as prodegradants in PHB, some of them very strong. The strongest ones contain P or N atoms with asym. free electron pairs in their mols. that evidently accelerate the main degradation mechanism of PHB-thermally induced cis-elimination.

Journal of Applied Polymer Science 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 C2H3N3, Formula: C42H63O3P.

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

Konecny, V. published the artcileSynthesis and biological properties of dithiocarbamic acid derivatives. IV. Herbicidal activity of some esters of N, N-diethyldithiocarbamic acid, Category: esters-buliding-blocks, the publication is Acta Facultatis Rerum Naturalium Universitatis Comenianae, Chimia (1971), 47-57, database is CAplus.

The herbicidal effectiveness of N,N-diethyldithiocarbamic acid esters [(Et)2NC(:S)SR] or [(Et)2NC(:S)SCH2C(O)R] as foliar sprays or as preplant treatments in agricultural crops was most promising with N,N-diethyl-S-(2-chloroallyl)dithiocarbamidate (Vegadex) [95-06-7]. Similar herbicidal effects could be demonstrated with preplant or foliar applications of N,N-diethyl-S-propyldithiocarbamidate [19047-77-9] or with preplant applications of N,N-diethyl-S-(N’,N’-dimethylcarbamidomethyl)dithiocarbamidate [23257-85-4]. The synthesis of the title compounds was reported in an earlier paper.

Acta Facultatis Rerum Naturalium Universitatis Comenianae, Chimia published new progress about 3052-61-7. 3052-61-7 belongs to esters-buliding-blocks, auxiliary class Amine,Benzene,Amide, name is Benzyl diethylcarbamodithioate, and the molecular formula is C12H17NS2, Category: esters-buliding-blocks.

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

Brandao, Tiago A. S. published the artcileBond length-reactivity correlations for sulfate monoesters. The crystal structure of potassium 4-nitrophenyl sulfate, C₆H₄KNO₆S, Recommanded Product: Potassium 4-nitrophenyl sulfate, the publication is Journal of Molecular Structure (2005), 734(1-3), 205-209, database is CAplus.

K 4-nitrophenyl sulfate, C₆H₄KNO₆S, crystallizes in the orthorhombic system, Pbca space group, with a 6.990(1), b 13.130(1), c 19.180(1) Å. Crystallog. data are given. The asym. unit consists of a discrete ionic pair of the salt. The packing shows the K⁺ ion surrounded by eight O atoms from six different p-nitrophenyl sulfate anions. The structure-structure and structure-reactivity correlations relevant to sulfate transfer process are discussed.

Journal of Molecular Structure published new progress about 6217-68-1. 6217-68-1 belongs to esters-buliding-blocks, auxiliary class Salt,Nitro Compound,Sulfonate,Benzene, name is Potassium 4-nitrophenyl sulfate, and the molecular formula is C6H4KNO6S, Recommanded Product: Potassium 4-nitrophenyl sulfate.

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

Crotti, Antonio E. M. published the artcileReal-time monitoring of a cobalt-mediated one-pot transition metal-catalyzed multicomponent reaction, Formula: C7H10O4, the publication is Inorganica Chimica Acta (2020), 119654, database is CAplus.

In this paper, pressurized sample infusion electrospray ionization mass spectrometry (PSI-ESI-MS) and FTIR spectroscopy were used to investigate the mechanism of a like-Barbier cobalt-mediated one-pot transition metal-catalyzed multicomponent reaction (MCR). The use of charge-tagged aryl halides allowed for the detection of cobalt(II)-promoted hydrodehalogenation products. Although these products were also detected in the off-line ESI-MS monitoring, the ability of PSI-ESI-MS to track real-time changes in the reaction mixture composition proved cobalt(II) was responsible for the undesired transformation. The occurrence of cobalt(II)-promoted hydrodehalogenation as a side reaction in this MCR had not been considered in previous mechanistic proposals and represents an important mechanistic consideration. In this paper, pressurized sample infusion electrospray ionization mass spectrometry (PSI-ESI-MS) and FTIR spectroscopy was used to investigate the mechanism of a like-Barbier cobalt-mediated one-pot transition metal-catalyzed multicomponent reaction (MCR). The use of charge-tagged aryl halides allowed for the detection of cobalt(II)-promoted hydrodehalogenation products. Although these products were also detected in the off-line ESI-MS monitoring, the ability of PSI-ESI-MS to track real-time changes in the reaction mixture composition proved cobalt(II) was responsible for the undesired transformation. The occurrence of cobalt(II)-promoted hydrodehalogenation as a side reaction in this MCR had not been considered in previous mechanistic proposals and represents an important mechanistic consideration.

Inorganica Chimica Acta 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, Formula: C7H10O4.

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