Month: December 2022

Fang, Kun published the artcileDiscovery of Novel Indoleamine 2,3-Dioxygenase 1 (IDO1) and Histone Deacetylase (HDAC) Dual Inhibitors, Application In Synthesis of 1877-71-0, the publication is ACS Medicinal Chemistry Letters (2018), 9(4), 312-317, database is CAplus and MEDLINE.

In order to take advantage of both immunotherapeutic and epigenetic antitumor agents, the first generation of dual indoleamine 2,3-dioxygenase 1 (IDO1) and histone deacetylase (HDAC) inhibitors were designed. The highly active dual inhibitor 10 showed excellent and balanced activity against both IDO1 (IC₅₀ = 69.0 nM) and HDAC1 (IC₅₀ = 66.5 nM), whose dual targeting mechanisms were validated in cancer cells. Compound 10 had good pharmacokinetic profiles as an orally active antitumor agent and significantly reduced the L-kynurenine level in plasma. In particular, it showed excellent in vivo antitumor efficacy in the murine LLC tumor model with low toxicity. This proof-of-concept study provided a novel strategy for cancer treatment. Compound 10 represents a promising lead compound for the development of novel antitumor agents and can also be used as a valuable probe to clarify the relationships and mechanisms between cancer immunotherapy and epigenetics.

ACS Medicinal Chemistry Letters 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 C9H8O4, Application In Synthesis of 1877-71-0.

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

Asano, Akiko published the artcileEffects of amino acids and chirality for molecular folding of desoxazoline-ascidiacyclamide derivatives: x-ray crystal structures of four cyclic octapeptides including unusual amino acids, cyclo(-Ile-aThr-D-Val-Thz-)₂, cyclo(-Ala-aThr-D-Val-Thz-Ile-aThr-D-Val-Thz-), cyclo(-Val-aThr-D-Val-Thz-Ile-aThr-D-Val-Thz-), and cyclo(-Ile-aThr-Val-Thz-Ile-aThr-D-Val-Thz-), Formula: C10H19NO3, the publication is Biopolymers (2001), 58(3), 295-304, database is CAplus and MEDLINE.

The desoxazoline derivative of ascidiacyclamide, cyclo(-L-Ile-L-allo-threonine-D-Val-thiazole-)₂ (1), was modified to disturb the C₂-symmetry. Three addnl. derivatives of ascidiacyclamide were prepared as follows: the Ile¹ residue of 1 was replaced with Ala (2) or Val (3), and the D-Val³ residue was replaced with Val (4). The crystal structures of 1-4 were analyzed by x-ray diffraction methods. The mols. of all compounds were folded and this type of structure has not been observed so far in x-ray structures of ascidiacyclamide derivatives except for patellamide D. The folding patterns of 1-4 were similar to each other and resembled that of patellamide. The asym. modifications at position 1 caused the conformational changes at local area, and these were related to peptide-peptide and peptide-solvent interactions. Despite the diverse backbone conformation generated by the epimeric modification at position 3, the entire mol. of 4 was folded. These results indicate that (1) the desoxazoline-ascidiacyclamides favored the folded structures, and (2) modifications of the side chain size at position 1 and the chirality at position 3 introduced the local conformational changes to the derivatives, suggesting that (3) the lack of the oxazoline block leads to conformational flexibility in 1-4, which accept the conformational change with no drastic change on the entire structure.

Biopolymers published new progress about 106391-88-2. 106391-88-2 belongs to esters-buliding-blocks, auxiliary class Amine,Aliphatic hydrocarbon chain,Amide,Aldehyde, name is (R)-tert-Butyl (3-methyl-1-oxobutan-2-yl)carbamate, and the molecular formula is C10H19NO3, Formula: C10H19NO3.

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

Baum, H. published the artcileSulfatases. XXI. The anomalous kinetics of arylsulfatase A of human tissues: the anomalies, Synthetic Route of 6217-68-1, the publication is Biochemical Journal (1958), 567-72, database is CAplus and MEDLINE.

cf. C.A. 52, 14725h. Preparations of human arylsulfatase A exhibit anomalous time-activity curves when incubated with di-K 2-hydroxy-5-nitrophenylsulfate (I), K p-acetylphenylsulfate, and K p-nitrophenyl sulfate. The rate of the reaction increases with time, at a rate which varies with the enzyme concentration The rate is proportional to some value greater than the 1st power of the enzyme concentration, depending upon the length of incubation time. Increasing substrate concentration during the initial period of incubation results in an increase in the rate to a maximum, whereas with prolonged incubation with the substrate the rate passes through a maximum and falls at higher substrate concentrations During the early incubation period there are optima at pH 4.4 and 5.0, whereas as the period of incubation is extended the 2 peaks merge at pH 4.4, and then shift to 4.7. The time-activity curves obtained at 20.5 and 30.5° cross those obtained at 37.5 and 50.5°; this indicates that enzyme destruction is not an important factor. The anomalous kinetics appear to be a feature peculiar to mammalian arylsulfatase A and are not shown by human arylsulfatase B or the arylsulfatases of limpets (Patella vulgata), Alcaligenes metalcaligenes, Taka-Diastase, and Helix pomatia.

Biochemical Journal 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, Synthetic Route of 6217-68-1.

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

Sipes, I. G. published the artcileBenzyl derivatives, Product Details of C12H14O2, the publication is WHO Food Additives Series (2011), 189-206, database is CAplus.

The Committee evaluated eight addnl. flavoring agents belonging to the group of benzyl derivatives that was previously evaluated. The structural feature common to all members of the group is a primary oxygenated functional group bonded directly to a benzene ring or a functional group metabolized to a benzyl alc. or benzoic acid derivative Generally, the Committee concluded that these eight flavoring agents, which are additions to the group of benzyl derivatives evaluated previously, would not give rise to safety concerns at current estimated dietary exposures.

WHO Food Additives Series published new progress about 5205-11-8. 5205-11-8 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Benzene,Ester, name is 3-Methylbut-2-en-1-yl benzoate, and the molecular formula is C20H12N2O2, Product Details of C12H14O2.

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

Ru, Tingting published the artcileA method for synthesis of 2H-[1, 4]oxazole triazine [2, 3, 4]-6-quinoline carboxylic acid derivatives by microwave, Quality Control of 924-99-2, the publication is Huagong Shikan (2014), 28(1), 15-17, database is CAplus.

The new method was introduced for synthesis of quinolinelactone compounds by microwave. The reaction was simple, high efficient and clean. Using the microwave heating, a series of oxazoletriazine [2, 3, 4]-6-quinoline carboxylic acid derivatives were synthesized, and the compounds were characterized by IR, ¹H NMR and mass spectrometry.

Huagong Shikan published new progress about 924-99-2. 924-99-2 belongs to esters-buliding-blocks, auxiliary class Alkenyl,Amine,Aliphatic hydrocarbon chain,Ester, name is Ethyl 3-(dimethylamino)acrylate, and the molecular formula is C7H13NO2, Quality Control of 924-99-2.

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

Li, Jiajia published the artcileVisible Light-Induced Living Radical Polymerization of Butyl Acrylate: Photocatalyst-Free, Ultrafast, and Oxygen Tolerance, SDS of cas: 19788-49-9, the publication is Macromolecular Rapid Communications (2017), 38(13), n/a, database is CAplus and MEDLINE.

Bu acrylate is polymerized in the living way under the irradiation of purple light-emitting diode (LED) or sunlight without photocatalyst at ambient temperature 2-((Phenoxycarbonothioyl)thio) Et propanoate is exclusively added and acted as an initiator and a chain transfer agent simultaneously in the current system. Poly(Bu acrylate) with well-regulated mol. weight and relatively narrow mol. weight distribution (ETH < 1.30) is synthesized. High conversion (>95%) can be achieved within several minutes. Polymerization shows oxygen tolerance. Near quant. end-group fidelity of polymer is demonstrated by ¹H NMR and matrix-assisted laser desorption/ionization time-of-flight mass spectra.

Macromolecular Rapid Communications published new progress about 19788-49-9. 19788-49-9 belongs to esters-buliding-blocks, auxiliary class Thiol,Aliphatic hydrocarbon chain,Ester, name is Ethyl 2-mercaptopropanoate, and the molecular formula is C5H10O2S, SDS of cas: 19788-49-9.

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

Mau, Alexandre published the artcileConcomitant initiation of radical and cationic polymerizations using new copper complexes as photoinitiators: Synthesis and characterisation of acrylate/epoxy interpenetrated polymer networks, Related Products of esters-buliding-blocks, the publication is European Polymer Journal (2021), 110457, database is CAplus.

Two new copper complexes were investigated in three-component visible light photoinitiating system for both radical and cationic polymerization under air. Their reactivity and efficiency have been compared with that of a highly efficient photoredox catalyst. The formation of acrylate/epoxy interpenetrated polymer networks were successfully performed through concomitant initiation of radical and cationic polymerization with low copper complex content upon either LED@405 nm or LED@455 nm irradiations. Several characterizations of the acrylate/epoxy IPNs final properties, such as the mech. properties, adhesion properties, shrinkage and swelling, indicated the possibilities to adapt or tune their properties compared to radical polymerization of TMPTA.

European Polymer Journal 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, Related Products of esters-buliding-blocks.

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

Steingass, Christof B. published the artcileInfluence of fruit logistics on fresh-cut pineapple (Ananas comosus [L.] Merr.) volatiles assessed by HS-SPME-GC-MS analysis, Synthetic Route of 103-26-4, the publication is European Food Research and Technology (2021), 247(7), 1617-1630, database is CAplus.

Green-ripe pineapples are shipped overseas by sea freight, while those picked at full maturity need to be transported by airfreight over the same large distance. In this study, fresh-cut pineapple cubes were assessed two, five, and eight days after processing from green-ripe pineapples after mimicked sea freigh (SF) and fully ripe air-freighted (AF) pineapples. The sea-freighted samples displayed elevated titratable acidity (TA), thus resulting in smaller ratios of total soluble solids and TA compared to the AF pineapples. Differences in the carotenoid levels of the two fresh-cut categories were found to be insignificant. By contrast, hierarchical cluster anal. (HCA) and principal component anal. (PCA) calculated on the basis of the volatiles analyzed by headspace solid-phase microextraction-gas chromatog.-mass spectrometry (HS-SPME-GC-MS) permitted to distinguish all six individual sample types and to segregate them into two major clusters (SF and AF). The effect of storage on the volatiles was further evaluated by partial least squares (PLS) regression. Substantial chem. markers to differentiate the individual samples and to describe the effect of storage were deduced from the PCA and PLS regression, resp. In general, fresh-cut products obtained from fully ripe AF fruit displayed higher concentrations of volatiles, in particular, increased concentrations of diverse Me esters. With progressing storage duration, the concentrations of ethanol and diverse Et esters increased. Moreover, products from AF pineapples displayed lower microbial counts compared to those from SF fruit.

European Food Research and Technology 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 C12H23N3S, Synthetic Route of 103-26-4.

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

Vainio, S. K. published the artcileDimethyl fumarate decreases short-term but not long-term inflammation in a focal EAE model of neuroinflammation, Name: Dimethyl fumarate, the publication is EJNMMI Research (2022), 12(1), 6, database is CAplus and MEDLINE.

Abstract: Background: Di-Me fumarate (DMF) is an oral immunomodulatory drug used in the treatment of autoimmune diseases. Here, we sought to study whether the effect of DMF can be detected using positron emission tomog. (PET) targeting the 18-kDa translocator protein (TSPO) in the focal delayed-type hypersensitivity rat model of multiple sclerosis (fDTH-EAE). The rats were treated orally twice daily from lesion activation (day 0) with either vehicle (tap water with 0.08% Methocel, 200μL; control group n = 4 (3 after week four)) or 15 mg/kg DMF (n = 4) in 0.08% aqueous Methocel (200μL) for 8 wk. The animals were imaged by PET using the TSPO tracer [¹⁸F]GE-180 in weeks 0, 1, 2, 4, 8, and 18 following lesion activation, and the non-displaceable binding potential (BP_ND) was calculated Immunohistochem. staining for Iba1, CD4, and CD8 was performed in week 18, and in sep. cohorts of animals, following 2 or 4 wk of treatment. Results: Using the fDTH-EAE model, DMF reduced the [¹⁸F]GE-180 BP_ND in the DMF-treated animals compared to control animals after 1 wk of treatment (two-tailed unpaired t test, p = 0.031), but not in weeks 2, 4, 8, or 18 when imaged in vivo by PET. Immunostaining for Iba1 showed that DMF had no effect on the perilesional volume or the core lesion volume after 2 or 4 wk of treatment, or at 18 wk. However, the optical d. (OD) measurements of CD4⁺ staining showed reduced OD in the lesions of the treated rats. Conclusions: DMF reduced the microglial activation in the fDTH-EAE model after 1 wk of treatment, as detected by PET imaging of the TSPO ligand [¹⁸F]GE-180. However, over an extended time course, reduced microglial activation was not observed using [¹⁸F]GE-180 or by immunohistochem. for Iba1⁺ microglia/macrophages. Addnl., DMF did affect the infiltration of CD4⁺ and CD8⁺ T-lymphocytes at the fDTH-EAE lesion.

EJNMMI Research published new progress about 624-49-7. 624-49-7 belongs to esters-buliding-blocks, auxiliary class Inhibitor,Natural product, name is Dimethyl fumarate, and the molecular formula is C18H16N2O6, Name: Dimethyl fumarate.

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

Zhang, Yu published the artcileMorphology evolution and mechanical property enhancement of linear low-density polyethylene by adding disentangled ultrahigh molecular weight polyethylene, Related Products of esters-buliding-blocks, the publication is Polymers for Advanced Technologies (2022), 33(4), 1047-1056, database is CAplus.

Ultra-high mol. weight polyethylene (UHMWPE) and linear low-d. polyethylene (LLDPE) with different ratios were melt-blended in an internal mixer. Results of rheol. tests and SEM indicate that the blends are well miscible in the range of small addition amount of UHMWPE. The content of UHMWPE is suggested to be less than 5.0 wt%, to guarantee good compatibility of biphasic blends. Differential scanning calorimetry studies indicate that co-crystallization occurs between UHMWPE and LLDPE. The crystallinity increases with the increase of UHMWPE as a nucleating agent. As a result, an improvement in mech. properties is achieved. When the addition amount of UHMWPE is 5.0 wt%, the impact strength, breaking elongation, Young’s modulus, and tensile strength are significantly increased by 27%, 25%, 75%, and 21% resp.

Polymers for Advanced Technologies 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 C7H7IN2O, Related Products of esters-buliding-blocks.

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