Tag: 100-200

On November 11, 2014, Tabata, Yuta; Abe, Hideki published an article.Electric Literature of 3976-69-0 The title of the article was Synthesis and Properties of Alternating Copolymers of 3-Hydroxybutyrate and Lactate Units with Different Stereocompositions. And the article contained the following:

Alternating copolymers of (R)-3-hydroxybutyrate ((R)-3HB) and lactate (2-hydroxypropionate: 2HP) units were synthesized by polycondensation reaction of preprepared dimeric monomers, (R)-3HB-(R)-2HP and (R)-3HB-(S)-2HP, in the presence of condensation agent. On the basis of the NMR analyses, it was confirmed that the obtained copolymers had an alternating sequence of (R)-3HB and 2HP units. In contrast to random copolymers of (R)-3HB and 2HP units, the repeating sequence of alternately connected (R)-3HB and 2HP units formed crystalline region. The copolymer with alternating sequence of (R)-3HB and (S)-2HP units had a melting temperature at 83 °C. On the other hands, the melting temperature of copolymer of (R)-3HB and (R)-2HP units was quite higher than those of the corresponding homopolymers (around 180 °C) and reached to 233 °C. When the alternating copolymers were prepared from a mixture of stereoisomeric dimers, both the melting temperature and crystallinity varied in the wide ranges depending on the composition of stereoisomeric dimers. The experimental process involved the reaction of (R)-Methyl 3-hydroxybutanoate(cas: 3976-69-0).Electric Literature of 3976-69-0

The Article related to hydroxybutyrate lactate alternating copolymer synthesis stereoisomeric dimer, Chemistry of Synthetic High Polymers: Organic Condensation and Step Polymerization and other aspects.Electric Literature of 3976-69-0

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

On November 22, 2021, Abdelkawy, Mahmoud A.; Davin, Christopher; Aly, El-Saied A.; El-Badawi, Mahmoud A.; Itsuno, Shinichi published an article.Application In Synthesis of Methyl 2-cyclopentanonecarboxylate The title of the article was Chiral Polyureas Derived Cinchona Alkaloids: Highly Efficient Bifunctional Organocatalysts for the Asymmetric Michael Addition Reaction. And the article contained the following:

Repetitive Mizoroki-Heck (MH) coupling polymerization was used to create novel chiral polyureas with cinchona alkaloids in the main chain. Apart from two-component polycondensation of cinchona urea dimers with diiodobenzene via MH reaction conditions, some chiral polyureas were easily polymerized under self polycondensation to yield the chiral polymers. The asym. Michael addition reaction was successfully carried out using chiral polymers derived cinchona urea. Interestingly, phenolic-based chiral polymers served as heterogeneous catalysts for the enantioselective Michael reaction, with high catalytic activity and excellent enantioselectivities (up to 99% ee). These polymeric catalysts were also stable, and they could be recycled and reused. The experimental process involved the reaction of Methyl 2-cyclopentanonecarboxylate(cas: 10472-24-9).Application In Synthesis of Methyl 2-cyclopentanonecarboxylate

The Article related to chiral polyurea cinchona alkaloid organocatalyst asym michael addition, Chemistry of Synthetic High Polymers: Organic Condensation and Step Polymerization and other aspects.Application In Synthesis of Methyl 2-cyclopentanonecarboxylate

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

On May 1, 2015, Zhang, Ze; You, Ye-Zi; Wu, De-Cheng; Hong, Chun-Yan published an article.SDS of cas: 6038-19-3 The title of the article was A novel multicomponent reaction and its application in sequence-ordered functional polymer synthesis. And the article contained the following:

Multicomponent reactions are of substantial significance not only for organic synthesis but also for polymer synthesis due to their more bond-forming events per synthetic operation. Generally due to that there are two or more reactions in one multicomponent reaction system, synergistic catalysis, in which the two or more reactions are activated by two or more different catalysts at the same time, is very important for achieving high-efficiency transformations. However, achieving synergistic catalysis via using two or more different catalyst simultaneously is a great challenge. Here, we propose a new reactant-synergistically catalyzed multicomponent reaction, in which the units coming from the reactant can synergistically catalyze the two reactions at the same time. Moreover, this multicomponent reaction can be extended to multicomponent polymerization, which is a very promising method for the preparation of functional polymers with defined-sequence. The experimental process involved the reaction of 3-Aminodihydrothiophen-2(3H)-one hydrochloride(cas: 6038-19-3).SDS of cas: 6038-19-3

The Article related to polyamide polyester polythioether multicomponent sequence polymer, Chemistry of Synthetic High Polymers: Organic Condensation and Step Polymerization and other aspects.SDS of cas: 6038-19-3

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

On November 30, 2015, Yang, Lu; Zhang, Ze; Cheng, Bofei; You, Yezi; Wu, Decheng; Hong, Chunyan published an article.Category: esters-buliding-blocks The title of the article was Two tandem multicomponent reactions for the synthesis of sequence-defined polymers. And the article contained the following:

Multicomponent polymerizations have become powerful tools for the construction of sequence-defined polymers. Although the Passerini multicomponent reaction has been widely used in the synthesis of sequence-defined polymers, the tandem usage of the Passerini multicomponent reaction and other multicomponent reactions in one-pot for the synthesis of sequence-defined polymers has not been developed until now. In this contribution, we report the tandem usage of the Passerini three-component reaction and the three-component amine-thiol-ene conjugation reaction in one pot for the synthesis of sequence-defined polymers. The Passerini reaction between methacrylic acid, adipaldehyde, and 2-isocyanobutanoate was carried out, affording a new mol. containing two alkene units. Subsequently, an amine and a thiolactone were added to the reaction system, whereupon the three-component amine-thiol-ene conjugating reaction occurred to yield a sequence-defined polymer. This method offers more rapid access to sequence-defined polymers with high mol. diversity and complexity. The experimental process involved the reaction of 3-Aminodihydrothiophen-2(3H)-one hydrochloride(cas: 6038-19-3).Category: esters-buliding-blocks

The Article related to passerini reaction amine thiolene conjugation sequence polymer, Chemistry of Synthetic High Polymers: Organic Condensation and Step Polymerization and other aspects.Category: esters-buliding-blocks

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

On January 14, 2014, Goethals, Fabienne; Martens, Steven; Espeel, Pieter; van den Berg, Otto; Du Prez, Filip E. published an article.Related Products of 6038-19-3 The title of the article was Diversely Substituted Polyamide Structures through Thiol-Ene Polymerization of Renewable Thiolactone Building Blocks. And the article contained the following:

A thiolactone derivative of 10-undecenoic acid was used as a renewable AB’ monomer for the one-pot synthesis of diversely substituted polyamide structures, containing amide moieties both in the polymer backbones and in their side chains. Nucleophilic aminolysis of the thiolactone entity liberates a thiol, which further reacts in a stepwise thiol-ene photopolymerization reaction. Using different primary amines, several structurally diverse polyamides, with phys. properties dependent on the length and chem. identity of the side chain, were obtained. Postpolymn. oxidation of the sulfide linkages in the polymer backbone to their corresponding sulfoxides and sulfones altered the material, with the degree of oxidation having an impact on the final mech. properties. Furthermore, this mild and straightforward polymerization procedure was applied for the synthesis of functional polymer networks. 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 thio ene polymerization thiolactone derivative undecenoic acid, Chemistry of Synthetic High Polymers: Organic Condensation and Step Polymerization and other aspects.Related Products of 6038-19-3

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

On September 30, 2013, Tabata, Yuta; Abe, Hideki published an article.Application In Synthesis of (R)-Methyl 3-hydroxybutanoate The title of the article was Effects of composition and sequential structure on thermal properties for copolymer of 3-hydroxybutyrate and lactate units. And the article contained the following:

Copolymers of (R)-3-hydroxybutyrate (3HB) and (R)-lactate ((R)-2-hydroxypropionate: 2HP) units were synthesized by polycondensation reaction from Me esters of 3HB and 2HP in the presence of titanium-based catalyst. Mixing of two monomers from the beginning of polymerization yielded random copolymers of 3HB and 2HP units. On the other hand, by controlling the time of mixing of two monomers, copolymers with blocking tendency were obtained. The structure and thermal properties of the obtained copolymers were characterized by 1H and 13C NMR, x-ray diffraction, differential scanning calorimetry, and optical microscopy. Glass-transition temperature of the copolymers was mainly governed by the copolymer composition, and the values varied linearly with the composition In contrast, the melting temperature was strongly depending on the sequential length of crystallizable monomeric unit, and the values were in inverse proportion to the number-averaged sequential length of crystallizable monomeric unit. The crystallinity of the copolymer samples was affected by both the composition and sequential length of crystallizable monomeric unit. The finding is valuable for design of copolymer mols. with desirable thermal properties by controlling both the copolymer composition and sequential structure. 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 hydroxybutyrate lactate copolymer synthesis thermal property, Chemistry of Synthetic High Polymers: Organic Condensation and Step Polymerization and other aspects.Application In Synthesis of (R)-Methyl 3-hydroxybutanoate

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

On December 5, 2020, Yang, Ziyue; Sun, Dongcheng published an article.Recommanded Product: 517-23-7 The title of the article was Self-healing supramolecular waterborne polyurethane dispersions with quadruple hydrogen bonds in main chain. And the article contained the following:

A facile method for preparing supramol. waterborne polyurethane (WPU) based on quadruple hydrogen bonds (4H-WPU) is reported. Herein, 4H-WPU with quadruple hydrogen bonds in main chain were synthesized by poly (1,4-butylene-neopentylene adipate glycol) as soft segment, 2-ureido-4[1H]-pyrimidinone (UPy) functionalized monomer, isophorone diisocyanate, 2,2-Bis(hydroxymethyl)propionic acid (hydrophilic monomer), isophoronediamine, triethylamine (neutralizer), and monoethanolamine (blocking agent) as hard segment. The mol. weight of 4H-WPU was controlled around 18,000 consistently. The properties of 4H-WPU with different content of hydrophilic group, hard segment, and UPy units were characterized and the results could provide the reference for preparing supramol. WPU with high mech. and self-healing performance while maintaining dispersion stability. The tensile strength of 4H-WPU was 10 times of the blank sample. The healing time of scratched 4H-WPU film was inversely proportional to the content of UPy-functionalized monomer and the shortest healing time is 2.5 h at 80°C. Mech. performance of healed films can be restored to more than 90%. 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 polyurethane preparation self healing morphol mech property, Chemistry of Synthetic High Polymers: Organic Condensation and Step Polymerization and other aspects.Recommanded Product: 517-23-7

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

On December 29, 2005, Bjoere, Annika; Bonn, Peter; Gran, Ulrik; Kajanus, Johan; Olsson, Christina; Ponten, Fritiof published a patent.Application In Synthesis of Methyl 2-(2,6-difluorophenyl)acetate The title of the patent was Preparation of novel oxabispidine compounds and their use in the treatment of cardiac arrhythmias. And the patent contained the following:

There is provided oxabispidines (shown as I; variables defined below; e.g. N-[2-[7-[(2S)-3-(4-cyanophenoxy)-2-hydroxypropyl]-9-oxa-3,7-diazabicyclo[3.3.1]non-3-yl]ethyl]-1-phenylmethanesulfonamide (shown as II)), which are useful in the prophylaxis and in the treatment of arrhythmias, in particular atrial and ventricular arrhythmias. For I: R1 = C1-12 alkyl, -C(O)XR7, -C(O)N(R8a)R5d or -S(O)2R9a; R2 = H, halo, C1-6alkyl, OR13, EN(R14)R15 or, together with R3, carbonyl O; R3 = H, C1-6alkyl or, together with R3, carbonyl O; A = direct bond, -J-, -JN(R19a)-, -JS(O)2N(R19b)-, -JN(R19c)S(O)2-, -JO- (in which latter 4 groups, -J is attached to the oxabispidine ring N); B = -Z{[C(O)]aC(H)(R20a)}b-, -Z[C(O)]cN(R20b)-, -ZN(R20c)S(O)2-, -ZS(O)2N(R20d)-, -ZS(O)n-, -ZO- (in which six groups Z is attached to the C atom bearing R2 and R3), -N(R20e)Z-, -N(R20f)S(O)2Z-, -S(O)2N(R20g)Z- or N(R20h)CO2Z- (in which latter 4 groups, Z is attached to the Ph or pyridyl group); J = C1-6alkylene optionally substituted; Z = a direct bond or C1-4 alkylene; G = CH or N; R4 = � optional -OH, cyano, halo, nitro, C1-6 alkyl (optionally terminated by -N(H)C(O)OR21a), C1-6 alkoxy, -N(R22a)R22b, -C(O)R22c, -C(O)OR22d -C(O)N(R22e)R22f -N(R22g)C(O)R22h, -N(R22i)C(O)N(R22j)R22k, -N(R22m)S(O)2R21b, -S(O)2N(R22n)R22o, -S(O)2R21c, -OS(O)2R21d and aryl; and R41 to R46 = H or C1-3 alkyl; addnl. details including provisos are given in the claims. Methods of preparation are claimed and preparations and/or characterization data for �2 examples of I and many intermediates are included. For example, II was prepared (72 %) from phenylmethanesulfonyl chloride and 4-[[(2S)-3-[7-(2-aminoethyl)-9-oxa-3,7-diazabicyclo[3.3.1]non-3-yl]-2-hydroxypropyl]oxy]benzonitrile, the latter of which was prepared (69 %) by deprotection of tert-Bu [2-[7-[(2S)-3-(4-cyanophenoxy)-2-hydroxypropyl]-9-oxa-3,7-diazabicyclo[3.3.1]non-3-yl]ethyl]carbamate. The example I were tested for primary electrophysiol. effects in anesthetized guinea pigs and exhibit D10 >5.5. The example I were tested in a Rb+-efflux assay for detection of HERG channel blockers and exhibit pIC50 >4.5, e.g. 5.72 for II. The experimental process involved the reaction of Methyl 2-(2,6-difluorophenyl)acetate(cas: 872046-08-7).Application In Synthesis of Methyl 2-(2,6-difluorophenyl)acetate

The Article related to oxabispidine preparation cardiac arrhythmia treatment, oxadiazabicyclononane preparation cardiac arrhythmia treatment, Heterocyclic Compounds (More Than One Hetero Atom): Eight- and Higher-Membered Rings and other aspects.Application In Synthesis of Methyl 2-(2,6-difluorophenyl)acetate

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

On June 21, 2007, Bjoere, Annika; Cladingboel, David; Kajanus, Johan; Olsson, Christina; Ponten, Fritiof; Strandlund, Gert published a patent.Synthetic Route of 872046-08-7 The title of the patent was Preparation of oxabispidines for the treatment of cardiac arrhythmias. And the patent contained the following:

Title compounds [I; R1 = (substituted) alkyl, COER7, CONR8aR5d, SO2R9a; R2, R3 = H, F, alkyl; R4 = alkyl, 6-membered (hetero)aryl, etc.; R5d = H, (substituted) alkyl, aryl, (substituted) heterocyclyl, etc.; R8a = H, (substituted) alkyl, alkoxy, etc.; R9a = (substituted) alkyl; R41-R46 = H, alkyl; Z = NR14aCOA, CONR14bB; R14a, R14b = H, alkyl; A = bond, (substituted) alkylene; B = (substituted) alkylene; E = O, S; with specific exclusions], were prepared Thus, N-(4-cyanobenzyl)-2-(9-oxa-3,7-diazabicyclo[3.3.1]non-3-yl)acetamide dihydrochloride (preparation given), PhCH2CH2Br, and K2CO3 were heated together in MeCN at 60° for 66 h to give 76.2% N-(4-cyanobenzyl)-2-[7-(2-phenylethyl)-9-oxa-3,7-diazabicyclo[3.3.1]non-3-yl]acetamide. The latter showed a D10 value of 7.1 for class III electrophysiol. potency in guinea pigs. The experimental process involved the reaction of Methyl 2-(2,6-difluorophenyl)acetate(cas: 872046-08-7).Synthetic Route of 872046-08-7

The Article related to oxabispidine preparation cardiac arrhythmia treatment, antiarrhythmic oxadiazabicyclononane preparation, Heterocyclic Compounds (More Than One Hetero Atom): Eight- and Higher-Membered Rings and other aspects.Synthetic Route of 872046-08-7

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

Ganesan, Divakar; Chennapuram, Madhu; Begum, Zubeda; Seki, Chigusa; Okuyama, Yuko; Kwon, Eunsang; Uwai, Koji; Tokiwa, Michio; Tokiwa, Suguru; Takeshita, Mitsuhiro; Nakano, Hiroto published an article in 2019, the title of the article was Sugar based γ-amino alcohol organocatalyst for asymmetric michael addition of β-keto esters with nitroolefins.Category: esters-buliding-blocks And the article contains the following content:

Sugar based γ-amino alc. was used in asym. Michael addition of β-keto esters with nitroolefins for the first time affording the corresponding several chiral Michael adducts bearing quaternary chiral carbon center in moderate to good chem. yields and stereoselectivities (up to 98%, up to dr. 95:5, up to 84% ee). The experimental process involved the reaction of Methyl 2-cyclopentanonecarboxylate(cas: 10472-24-9).Category: esters-buliding-blocks

The Article related to sugar amino alc organocatalyst michael addition ketoester nitroolefin, Catalysis, Reaction Kinetics, and Inorganic Reaction Mechanisms: Catalytic Reactions and other aspects.Category: esters-buliding-blocks

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