Esters-buliding-blocks

On July 2, 2009, Manoharan, Muthiah; Rajeev, Kallanthottathil G.; Jayaraman, Muthusamy; Narayanannair, Jayaprakash K. published a patent.Name: (S)-5-tert-Butyl 1-methyl 2-aminopentanedioate The title of the patent was Preparation of oligonucleotide-folate conjugates. And the patent contained the following:

The invention provides an iRNA agent having at least one monomer with the structure shown in formula I, where A and B are each independently O, imino groups, or S; X, Y are independently H, a protecting group, a phosphate, phosphodiester, activated phosphate or phosphite group, phosphoramidite, a solid support, -P(Z’)(Z”)O-nucleoside, -P(Z’)(Z”O)-oligonucleotide, a lipid, a PEG, a steroid, a polymer, -P(Z’)(Z”)O-L6-Q’-L7-OP(Z”’)(Z””)O-oligonucleotide, a nucleotide, or an oligonucleotide (Y may also be a lipophile); R is folate, a folate analog or mimic or a folate receptor-binding ligand; L6, L7 are independently -(CH2)n-, -CR’R”(CH2)n-, -(CH2)nCR’R”-, -(CH2CH2O)mCH2CH2-, or -(CH2CH2O)mCH2CH2NH-; Q’ is NH, O, S, CH2, CO2, CONH, NHCH(Ra)CO-, -COCH(Ra)NH-, CO, etc.; Ra is H or an amino acid side chain; R’, R” are independently H, Me, OH, SH, NH2, alkyl- or dialkylamino; Z’, Z”, Z”’, and Z”” are independently O or S; n is 1-20; and m is 0-50. The synthesis and biol. properties of oligonucleotide-folate conjugates are described. An example describes the synthesis of folate conjugate monomer II (CPG = controlled pore glass long-chain alkylamine, DMTr = 4,4′-dimethoxytrityl). A figure shows the in vivo targeting of folate-conjugated siRNAs. The experimental process involved the reaction of (S)-5-tert-Butyl 1-methyl 2-aminopentanedioate(cas: 53838-27-0).Name: (S)-5-tert-Butyl 1-methyl 2-aminopentanedioate

The Article related to folate oligonucleotide conjugate preparation antitumor, Amino Acids, Peptides, and Proteins: Poly(Amino Acids) and Peptides and other aspects.Name: (S)-5-tert-Butyl 1-methyl 2-aminopentanedioate

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

On September 3, 1990, Paquet, Alenka published an article.Application of 59524-07-1 The title of the article was Preparation of dehydroalanine peptides from bis(2,2,2-trichloroethyl) and diphenyl phosphonoserine derivatives. And the article contained the following:

Preparation of dehydroalanine peptides from the corresponding bis(2,2,2-trichloroethyl) and di-Ph phosphonoserine derivatives by treatment with various organic bases is described. The experimental process involved the reaction of Benzyl 2-(((benzyloxy)carbonyl)amino)acrylate(cas: 59524-07-1).Application of 59524-07-1

The Article related to phosphonoserine peptide elimination base, dehydroalanine peptide, Amino Acids, Peptides, and Proteins: Poly(Amino Acids) and Peptides and other aspects.Application of 59524-07-1

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

On March 26, 2009, Gellerman, Gary published a patent.SDS of cas: 53838-27-0 The title of the patent was Preparation of diketopiperazines and related heterocyclic scaffolds which are useful for the preparation of combinatorial libraries. And the patent contained the following:

The invention discloses heterocyclic scaffolds I [X, Y, Z are independently CH2 or CO; R1, R2 are (CH2)0-5CO2H or (CH2)0-5-Q1-P1 or (CH2)0-5-Q2-P2, resp.; R3 is (CO)0-1-A-CO2H or (CO)0-1-A-Q3-P3, where Q1, Q2, Q3 are linkers N, NH, O, or S; P1, P2, P3 are protecting groups; A is a linker (CH2)0-5, O(CH2)0-5, NH(CH2)0-5, -N-alkyl-(CH2)0-5, phenylene-(CH2)0-5, cyclopropylene-(CH2)0-5, cyclobutylene-(CH2)0-5, cyclopentylene-(CH2)0-5, cyclohexylene-(CH2)0-5, piperidinylene-(CH2)0-5, pyrrolene-(CH2)0-5; R4 is H or CH2 or CO attached to linker A], which are useful, for example, for the solid-phase organic synthesis of combinatorial libraries. Thus, I (X, Y are CO; Z-A-R3 is CH2CO2H; R1-CH2 is ornithine Alloc-protected side chain; R2-CH2 is lysine Fmoc-protected side chain; R4 is H) was prepared via peptide coupling in solution and heterocyclization (NMM in 2-butanol at reflux for 10 h). The experimental process involved the reaction of (S)-5-tert-Butyl 1-methyl 2-aminopentanedioate(cas: 53838-27-0).SDS of cas: 53838-27-0

The Article related to peptide piperazinedione preparation scaffold combinatorial library, Amino Acids, Peptides, and Proteins: Poly(Amino Acids) and Peptides and other aspects.SDS of cas: 53838-27-0

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

On March 7, 2019, Talik, Agnieszka; Tarnacka, Magdalena; Geppert-Rybczynska, Monika; Minecka, Aldona; Kaminska, Ewa; Kaminski, Kamil; Paluch, Marian published an article.Quality Control of Phenyl Salicylate The title of the article was Impact of the Interfacial Energy and Density Fluctuations on the Shift of the Glass-Transition Temperature of Liquids Confined in Pores. And the article contained the following:

The behavior of the low- and high-mol. weight glass formers confined in nanoporous templates remains an unsolved puzzle despite the intensive long-term studies in this matter. Special effort is taken to understand the enhancement of segmental or structural dynamics and the depression of the glass-transition temperatures, Tgs in materials infiltrated in pores of the nanometric size. In this paper, we have analyzed dielec., calorimetric, and contact angle data collected for various systems to determine which factors are responsible for these effects. It turned out that with increasing interfacial energy, mols. attached to the pore walls (interfacial layer) vitrify at higher temperatures Moreover, the dynamics of core mols. starts to deviate from bulk-like behavior. Therefore, a greater depression of the glass-transition temperature, Tg, of this fraction of mols. is noted. Also, it was found that the sensitivity of structural dynamics to the d. fluctuations, quantified by the pressure coefficient of the glass-transition temperature, dTg/dp, is another useful parameter to predict the shift of the glass-transition temperature of the confined glass formers. The results presented herein emphasize the great importance of surface effects, which play a primary role in a unified description of the impact of the nanometric spatial restriction on the dynamics of confined materials. The experimental process involved the reaction of Phenyl Salicylate(cas: 118-55-8).Quality Control of Phenyl Salicylate

The Article related to interfacial energy glass transition temperature liquid confined pore, Physical Organic Chemistry: Other Reactions, Processes, and Spectra and other aspects.Quality Control of Phenyl Salicylate

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

On December 22, 1992, Berti, Federico; Ebert, Cynthia; Gardossi, Lucia published an article.Application of 59524-07-1 The title of the article was One-step stereospecific synthesis of α,β-dehydroamino acids and dehydropeptides. And the article contained the following:

Dehydroamino acids and dehydropeptides were prepared by a one-pot reaction of hydroxy amino acid derivatives employing (EtO)2POCl in the presence of NaH. The reaction is stereospecific and proceeds without racemization. Thus, dehydration of R-Thr-OMe (R = Z, Z-Ala; Z = PhCH2O2C) gave (Z)-RNHC(CO2Me):CHMe in 75-80% yields. The experimental process involved the reaction of Benzyl 2-(((benzyloxy)carbonyl)amino)acrylate(cas: 59524-07-1).Application of 59524-07-1

The Article related to dehydroamino acid peptide, hydroxy amino acid dehydration chlorophosphate, Amino Acids, Peptides, and Proteins: Poly(Amino Acids) and Peptides and other aspects.Application of 59524-07-1

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

On October 31, 1993, Schwartz, Brenda L.; Erickson, Bruce W.; Bursey, Maurice M.; Marbury, G. Dean published an article.SDS of cas: 53838-27-0 The title of the article was Dependence of benzyl alcohol loss on C-terminal amino acid in tandem mass spectrometry of N-protected tripeptides. And the article contained the following:

The effect of the basicity and chain length of the C-terminal amino acid on the fragmentation of N-protected tripeptides was investigated with a hybrid tandem instrument. Pos.-ion unimol. decomposition and collisionally activated decomposition studies on the [M + H]+ ions of a series of N-benzyloxycarbonyl (Z)-protected tripeptides Z-Gly-Leu-Xxx-OMe and Z-Gly-Pro-Xxx-OMe (Xxx = Arg, Lys, Orn, Gln Glu) indicate that substitution of Leu with Pro at the second position in the tripeptides facilitates the loss of benzyl alc. (108 u) from the precursor. Addnl., higher gas-phase basicity and longer chain length of the C-terminal side-chain group promote the formation of the [M + H – 108]+ ion. The experimental process involved the reaction of (S)-5-tert-Butyl 1-methyl 2-aminopentanedioate(cas: 53838-27-0).SDS of cas: 53838-27-0

The Article related to protected tripeptide mass spectra, benzyloxycarbonyl tripeptide mass spectra, Amino Acids, Peptides, and Proteins: Poly(Amino Acids) and Peptides and other aspects.SDS of cas: 53838-27-0

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

On March 10, 2022, Cui, Junwei; Jander, Julius H.; Koller, Thomas M.; Froeba, Andreas P. published an article.Related Products of 3319-31-1 The title of the article was Viscosity and Surface Tension of High-Viscosity Standard Tris(2-ethylhexyl) Trimellitate Close to 0.1 MPa between 273 and 523 K by Surface Light Scattering. And the article contained the following:

In the present work, the liquid viscosity and surface tension of tris(2-ethylhexyl) trimellitate (TOTM) was determined close to 0.1 MPa over a temperature range between 273 and 523 K by surface light scattering (SLS). Such investigations were stimulated by the fact that TOTM is suggested as a potential viscosity standard of moderately high viscosity for temperatures up to 473 K and pressures up to 200 MPa. Based on the SLS experiments at macroscopic thermodn. equilibrium, a simultaneous determination of liquid viscosity from 273 to 523 K and surface tension from 398 to 523 K with relative expanded uncertainties typically below 0.03 (coverage factor k = 2) was possible. To evaluate the results from SLS and to check possible surface orientation effects found in our previous SLS studies on liquid organic hydrogen carriers, conventional methods in the form of the pendant-drop method and capillary viscometry were used to determine the surface tension and viscosity from 273 to 573 K and from 293 to 353 K, resp. For evaluating all exptl. methods applied, the liquid d. was obtained with the help of a vibrating-tube densimeter between 283 and 473 K. From a long-time SLS study at 573 K and subsequent d. and NMR measurements, a clear sample degradation of TOTM was observed, which may hinder its application as an industrial viscosity standard above 523 K. For both the surface tension and the viscosity which covers a range between about 1500 and 0.9 mPa at temperatures between 273 and 523 K, agreement between the results from SLS and the conventional methods within combined uncertainties was found, which is also valid by comparison with the literature. In summary, the exptl. results from this work could not only contribute to an improved data situation for viscosity and surface tension of TOTM over a broad temperature range but also reveal that TOTM does not show pronounced mol. orientation effects at the vapor-liquid interface which would influence the dynamics of the surface fluctuations probed by SLS. The experimental process involved the reaction of Tris(2-ethylhexyl) benzene-1,2,4-tricarboxylate(cas: 3319-31-1).Related Products of 3319-31-1

The Article related to viscosity surface tension tris ethylhexyl trimellitate surface light scattering, Physical Organic Chemistry: Other Reactions, Processes, and Spectra and other aspects.Related Products of 3319-31-1

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

On February 29, 2016, Prasopnatra, Preeyanuch; Sirisinha, Chakrit; Sae-oui, Pongdhorn published an article.Electric Literature of 3319-31-1 The title of the article was Processability and mouldability of hydrogenated acrylonitrile butadiene rubber: effects of co-agent, processing aids and softener in HNBR. And the article contained the following:

Rheol. properties of carbon black filled hydrogenated acrylonitrile butadiene rubber (HNBR) incorporated with various loadings of co-agents (Sartomer TRIM, Sartomer ZDA), processing aids (Struktol WB222 and Struktol NS60) and softener (TOTM) were determined and compared. With these chems., improvements in processability and moldability of HNBR compounds are observed at different magnitudes. Struktol WB222 provides the greatest improvement whereas Sartomer ZDA shows the least. Cure characteristics of the HNBR compounds are also affected, i.e., the additi- on of acrylate-based chems. such as Sartomer TRIM and Sartomer ZDA results in the enhanced cure rate and state-of-cure whereas the addition of Struktol WB222, Struktol NS60 and TOTM shows the opposite result trends. The experimental process involved the reaction of Tris(2-ethylhexyl) benzene-1,2,4-tricarboxylate(cas: 3319-31-1).Electric Literature of 3319-31-1

The Article related to hydrogenated acrylonitrile butadiene rubber aid softener coagent effect property, Synthetic Elastomers and Natural Rubber: Compounding and Processing and other aspects.Electric Literature of 3319-31-1

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

Crossley, Maxwell J.; Stamford, Andrew W. published an article in 1993, the title of the article was Concise, stereocontrolled synthesis of the C4 epimers of anticapsin and bacilysin: revision of the configurations of the natural products.Formula: C18H17NO4 And the article contains the following content:

The structures of anticapsin and bacilysin were shown to be I (R = H, H-Ala) rather than the reported C4 epimers II (R = H, H-L-Ala, R1 = H) via concise, stereocontrolled syntheses of II. Thus, Diels-Alder reaction of dehydroalanine ZNHC(CO2CH2Ph):CH2 (Z = PhCH2O2C) with 1-trimethylsilyloxy-1,3-cyclohexadiene regiospecifically gave a mixture of bicyclooctene stereoisomers, which were epoxidized to give endo epoxides III. Desilylation of III and alkoxide-induced ring cleavage gave racemic II (R = Z, R1 = CH2Ph) and its C2 epimer, which were separated by fractional crystallization Coupling of racemic II (R = H, R1 = Me) with Z-L-Ala-OH, separation of diastereomeric dipeptides, and deprotection gave (+)-II (R = H-Ala, R1 = H). The experimental process involved the reaction of Benzyl 2-(((benzyloxy)carbonyl)amino)acrylate(cas: 59524-07-1).Formula: C18H17NO4

The Article related to mol structure anticapsin bacilysin, asym synthesis anticapsin bacilysin diastereomer, Amino Acids, Peptides, and Proteins: Poly(Amino Acids) and Peptides and other aspects.Formula: C18H17NO4

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

Bekkar, Nour El Houda; Meddah, Boumediene; Keskin, Bahadir; Sonnet, Pascal published an article in 2021, the title of the article was Oral acute toxicity, influence on the gastrointestinal microbiota and in vivo anti-salmonellosis effect of Zizyphus lotus (L.) and Ruta chalepensis (L.) essential oils.Product Details of 85-91-6 And the article contains the following content:

The aim of this study was to evaluate the chem. composition of Zizyphus lotus and Ruta chalepensis essential oils (EOs), the oral acute toxicity, influence on the gastrointestinal microbiota and the in vivo anti-salmonellosis effect. The EOs were isolated using the steam distillation process, and bioactive components were identified by gas chromatog.-mass spectrometry (GC-MS) anal. Oral acute toxicity, influence on the gastrointestinal flora composition and the anti-salmonellosis effect were elucidated using in vivo methods on exptl. animals. The GC-MS allowed us to identify 33 and 58 components in Z. lotus and R. chalepensis, resp. Di-isooctyl phthalate (89.857%) was found to be the major compound identified in Z. lotus. The main compounds in R. chalepensis were 2-undecanone (26.528%) followed by 2-nonanone (13.404%). The LD50 of EOs was found to be greater than 5000 mg/kg. Also, no neg. influence to intestinal microbiota was detected. An important decrease in S. enterica ssp arizonae cells achieving a bactericidal effect was recorded in rats treated with the EOs of both plants at a dose of 400 mg/kg. In parallel, an important significant (P < 0.05) increase in lymphocytes number was observed for all tested animals. A decrease in alk. phosphatase (ALP), amino alanine transferase (ALT) and aspartate aminotransferase (AST) levels was observed Furthermore, a reduced blood erythrocyte sedimentation rate (ESR) was recorded in treated animals. The Z. lotus and R. chalepensis act effectively as anti-salmonellosis agents, which support the use of these plants to cure gastrointestinal infections. The experimental process involved the reaction of Methyl N-Methylanthranilate(cas: 85-91-6).Product Details of 85-91-6

The Article related to zizyphus ruta essential oils gastrointestinal microbiota antisalmonellosis oral acute, Microbial, Algal, and Fungal Biochemistry: Composition and Products and other aspects.Product Details of 85-91-6

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