Tag: 100-200

On May 1, 2013, Zhang, Junjie; Wang, Huanxia; Ma, Yun; Wang, Youming; Zhou, Zhenghong; Tang, Chuchi published an article.Application In Synthesis of (R)-Methyl 3-hydroxybutanoate The title of the article was CaF2 catalyzed SN2 type chlorodehydroxylation of chiral secondary alcohols with thionyl chloride: a practical and convenient approach for the preparation of optically active chloroalkanes. And the article contained the following:

A CaF2 catalyzed chlorodehydroxylation of chiral secondary alcs. with thionyl chloride has been developed. The chlorination reaction is effective for a wide range of alcs., generating the corresponding chloroalkanes in good yield with high optical purity with inversion of the original configuration of the alc. The experimental process involved the reaction of (R)-Methyl 3-hydroxybutanoate(cas: 3976-69-0).Application In Synthesis of (R)-Methyl 3-hydroxybutanoate

The Article related to chloroalkane chiral preparation, calcium fluoride catalyst chlorodehydroxylation chiral secondary alc thionyl chloride, Aliphatic Compounds: Halides and Halonium Compounds and other aspects.Application In Synthesis of (R)-Methyl 3-hydroxybutanoate

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

On January 16, 2015, Amaral, Monica F. Z. J.; Baumgartner, Amanda A.; Vessecchi, Ricardo; Clososki, Giuliano C. published an article.Product Details of 93476-46-1 The title of the article was Directed Metalation of 1-Ester-Substituted Indolizines: Base/Electrophile-Controlled Regioselective Functionalization. And the article contained the following:

A variety of C-2 and C-5 difunctionalized indolizines e. g., I, have been prepared through the reaction of 1-ester-substituted indolizines with organometallic bases followed by a reaction with different electrophiles. Metalation takes place under mild conditions allowing the isolation of a number of difunctionalized indolizines in good yields. The regioselectivity of the reaction appears to be governed by the nature of the base and electrophile. The experimental process involved the reaction of Ethyl indolizine-1-carboxylate(cas: 93476-46-1).Product Details of 93476-46-1

The Article related to indolizine regioselective synthesis, electrophile indolizine organometallic base metalation, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.Product Details of 93476-46-1

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

On September 1, 2019, Gaalova, Jana; Hejda, Stanislav; Stavarek, Petr; Sykora, Jan; Fajgar, Radek; Kluson, Petr; Izak, Pavel published an article.Quality Control of (R)-Methyl 3-hydroxybutanoate The title of the article was Pervaporation of (R)/(S)-methyl 3-hydroxybutyrate (∑MHB) from a mixture containing an ionic liquid, methanol and Ru catalyst. And the article contained the following:

Complex technologies in the production of fine chems. bring together various connected processes, each bringing specific green chem. challenges. A valuable mixture arises in the stereoselective hydrogenation of methyl-acetoacetate (MAA) to (R)- and (S)- Me 3-hydroxybutyrate (∑MHB) over Ru organometallic complex (R)-Ru/BINAP, and in a “green” tetra-alkylammonium bistriflimide/methanol/water solvent phase. The reaction could be carried out in various arrangements, e.g. in a batch mode, in a continuous stirred-tank reactor, or even in a tubular microfluidic chip reactor. In either case, the valuable optically pure Ru complex has been sought to be effectively separated, and potentially recycled. The ionic liquid phase (tetra-alkylammonium bistriflimide) is intended for selective accommodation of the complex in the reaction mixture and as a green alternative to other solvents. It was the main issue of this work to design a specific separation unit, to construct it, and to optimize its performance towards the efficient separation of ∑MHB from the ionic liquid phase bearing the (R)-Ru/BINAP complex. The unit was developed to be connected with the complex preparation process, employing the microreactor fluid flow platform. The separation part of the overall technol. was designed as a membrane pervaporation. The membrane separation proceeded with different feed mixtures combining ∑methyl 3-hydroxybutyrate, methanol, ionic liquid and/or the catalyst. The technique was applied at various temperatures, using the industrial composite PDMS membrane, PERVAP 4060 from Sulzer. The feed as well as the pervaporate were analyzed by NMR spectroscopy and IR spectroscopy. The enrichment factor of the ∑MHB with respect to the retentate was 1.24 and the ∑MHB permeate mass flux was 61 g h-1 m-2. In addition, the membrane was characterized by SEM and energy dispersive X-ray microanal. after the membrane process, showing no sorption of the catalyst into the membrane. The experimental process involved the reaction of (R)-Methyl 3-hydroxybutanoate(cas: 3976-69-0).Quality Control of (R)-Methyl 3-hydroxybutanoate

The Article related to pdms membrane methyl hydroxybutyrate pervaporation ionic liquid ru catalyst, Plastics Fabrication and Uses: Plastic Product Uses and other aspects.Quality Control of (R)-Methyl 3-hydroxybutanoate

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

On December 17, 2009, Yang, Yuzhu; Cheng, Kai; Zhang, Yuhong published an article.Application of 93476-46-1 The title of the article was Highly Regioselective Palladium-Catalyzed Oxidative Coupling of Indolizines and Vinylarenes via C-H Bond Cleavage. And the article contained the following:

A highly regioselective oxidative coupling reaction between indolizines and vinylarenes has been accomplished in the presence of palladium catalysts to give only the branched α-product in high efficiency. The regioselectivity is promoted significantly by bidentate nitrogen ligands. The experimental process involved the reaction of Ethyl indolizine-1-carboxylate(cas: 93476-46-1).Application of 93476-46-1

The Article related to regioselective oxidative coupling indolizine vinylarene palladium catalyst, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.Application of 93476-46-1

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

On July 22, 2009, You, Shuli; Xia, Jibao published a patent.Computed Properties of 93476-46-1 The title of the patent was Method for synthesizing 3-haloindolizine. And the patent contained the following:

The invention relates to the method for preparation of 3-haloindolizine derivatives of formula I. Compounds of formula I wherein R1 and R2 are independently H, C1-16 alkyl, C3-16 cycloalkyl, amino and derivatives,C1-16 alkoxy, halo, C1-16 alkanoyl, C5-10 heterocyclyl, C5-10 heteroaryl, etc.; are claimed. Compounds of formula I were prepared via halogenation of indolizines with copper halides. The method has the advantages of broad scope of suitable substrates, low cost, mild reaction conditions, easy operation, high efficiency, and high selectivity. The experimental process involved the reaction of Ethyl indolizine-1-carboxylate(cas: 93476-46-1).Computed Properties of 93476-46-1

The Article related to indolizine derivative halogenation, haloindolizine derivative preparation, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.Computed Properties of 93476-46-1

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

On May 18, 2021, Wang, Fenfen; Yang, Zhijun; Li, Jian; Zhang, Chi; Sun, Pingchuan published an article.Recommanded Product: 517-23-7 The title of the article was Bioinspired Polyurethane Using Multifunctional Block Modules with Synergistic Dynamic Bonds. And the article contained the following:

Nature embraces an intriguing strategy to create high-performance biomaterials, such as spider silk which presents an unparalleled combination of stiffness, tensile strength, and toughness via hierarchical structures. However, to fabricate synthetic polymers with such excellent properties remains a challenging task. Inspired by the integration of multiblock backbone and densely H-bonding assemblies in spider silk as well as the delicate iron-catecholate complexes in mussel byssus, we proposed a novel mol. design with multifunctional block modules to obtain polymer materials that exhibit excellent mech. property, self-healing ability, and reprocessability. It was achieved by introducing reversible iron-catechol (DOPA-Fe3+) crosslinks and quadruple H-bonds bearing 2-ureido-4-[1H]-pyrimidinone (UPy) dimers as multifunctional blocks into a segmented polyurethane backbone with urethane blocks and semicrystalline polycaprolactone (PCL) blocks. These two types of dynamic crosslinking knots served as the sacrificial bonds to dissipate energy efficiently under external stress burden, endowing the dual phys. crosslinked networks with increased toughness and breaking elongation. Moreover, the DOPA-Fe3+ complexes could increase the crystallization of PCL, leading to remarkably enhanced Young’s modulus and tensile strength. Solid-state NMR revealed the formation of quadruple H-bonds in UPy dimers and the presence of DOPA-Fe3+ complexes, which restricted the mobility of the mobile phase and enhanced the crystallinity of the PCL domain. This work provides a feasible way to develop bioinspired materials with self-healable and reprocessable features, in addition to balanced enhancement of both stiffness and toughness. The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).Recommanded Product: 517-23-7

The Article related to bioinspired polyurethane multifunctional module synergistic dynamic bond, Plastics Fabrication and Uses: Plastic Product Uses and other aspects.Recommanded Product: 517-23-7

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

On March 5, 2018, Brodzka, Anna; Koszelewski, Dominik; Zysk, Malgorzata; Ostaszewski, Ryszard published an article.Recommanded Product: 707-07-3 The title of the article was The mechanistic promiscuity of the enzymatic esterification of chiral carboxylic acids. And the article contained the following:

The studies on the enzymic kinetic resolution of 3-phenyl-4-pentenoic acid with various trialkyl orthoesters as alkoxy group donors are presented. The obtained results indicate that enantioselectivity of presented reaction is closely related to the alkoxy group donor structure. Based on critical anal. of the literature data and our own results we found that the previously recognized mechanism of such transformation is highly unlikely. In this paper we proposed a new revised mechanism explaining the role of alkoxy group donors. For trialkyl orthobenzoates excellent enzymic kinetic resolution of target substrate was achieved. The presented method is an unique example of an enzymic promiscuous activity toward esterification of carboxylic acids. The experimental process involved the reaction of (Trimethoxymethyl)benzene(cas: 707-07-3).Recommanded Product: 707-07-3

The Article related to lipase catalysis carboxylic acid esterification chiral ester kinetic resolution, Enzymes: Kinetics-Mechanism-Enzyme and Coenzyme Models and other aspects.Recommanded Product: 707-07-3

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

Xia, Qiang; Feng, Tao; Lou, Xiaowei; Wang, Ying; Sun, Yangying; Pan, Daodong; Cao, Jinxuan published an article in 2020, the title of the article was Headspace fingerprinting approach to identify the major pathway influencing volatile patterns of vinasse-cured duck processed by high pressure, as well as its impact on physicochemical and sensory attributes.HPLC of Formula: 123-25-1 And the article contains the following content:

Summary : As a decisive attribute, flavor could be influenced by HP treatments through multiple phys. and chem. pathways within the high pressure (HP)-assisted meat curing process. This investigation aimed to identify the major pathway influencing volatile flavor patterns of two representative vinasse-cured duck (VCD) products with HP treatments (150-300 MPa/15 min), including wet and dry types, by employing headspace fingerprinting as an untargeted approach. Results suggested that HP treatments greatly lowered moisture contents and increased Warner-Bratzler shear force and thiobarbituric acid reactive substances of the cured samples. According to multivariate models, the volatile flavor patterns of the HP-processed VCD could be clearly separated from the unprocessed samples, but the VCD pressurised at different intensities represented similar volatile fingerprinting, which was validated by e-nose anal. The discriminant anal. (OPLS-DA) model outlined vinasse-derived ethanol, acetic acid, 3-methyl-1-butanol, 2-methyl-1-butanol, phenethyl alc. and 2-methyl-3-octanone as the major discriminant aromas across the unpressurised and pressurised samples. The experimental process involved the reaction of Diethyl succinate(cas: 123-25-1).HPLC of Formula: 123-25-1

The Article related to meat product headspace fingerprinting volatile high pressure processing sensory, Food and Feed Chemistry: Meat, Eggs, Fish, and Seafood and other aspects.HPLC of Formula: 123-25-1

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

Abraham, Michael H.; Abraham, Raymond J. published an article in 2017, the title of the article was A simple and facile NMR method for the determination of hydrogen bonding by amide N-H protons in protein models and other compounds.HPLC of Formula: 85-91-6 And the article contains the following content:

It is shown that measurements of the 1H chem. shifts of amide N-H protons in chloroform and in DMSO solvents are sufficient to determine the extent of hydrogen bonding of the N-H protons in a variety of compounds containing the amide group. Two recent examples are presented from protein and structural chem. The experimental process involved the reaction of Methyl N-Methylanthranilate(cas: 85-91-6).HPLC of Formula: 85-91-6

The Article related to protein model hydrogen bond amide proton nmr shift amide, Amino Acids, Peptides, and Proteins: Protein Synthesis and other aspects.HPLC of Formula: 85-91-6

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

On April 30, 2018, Simonet-Davin, Raphael; Zard, Samir Z. published an article.Related Products of 6038-19-3 The title of the article was A Direct Xanthate-Based Route to γ-Thiolactones. And the article contained the following:

The first examples of direct synthesis of γ-thiolactones, e.g., I by addition of a thiolactone-based radical are described. Mono- and bis-γ-thiolactones can be obtained by a dilauroyl peroxide initiated addition of thiolactone xanthate to various alkenes such as hex-5-en-2-one, 2-allylmalonate, acrolein diethylacetal, etc. and α,ω-dienes such as 1,7-octadiene and diallyl carbonate. The process is modular and exhibits a high functional group tolerance. The experimental process involved the reaction of 3-Aminodihydrothiophen-2(3H)-one hydrochloride(cas: 6038-19-3).Related Products of 6038-19-3

The Article related to thiolactone preparation diastereoselective, xanthate thiolactone alkene radical addition, Heterocyclic Compounds (One Hetero Atom): Thiophenes and other aspects.Related Products of 6038-19-3

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