Tag: M.W=300-350

Agramunt, Jordi published the artcileInverse Electron-Demand Diels-Alder Bioconjugation Reactions Using 7-Oxanorbornenes as Dienophiles, Application of (3aR,5R,6R,7R,7aR)-5-(Acetoxymethyl)-2-methyl-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]oxazole-6,7-diyl diacetate, the publication is Journal of Organic Chemistry (2020), 85(10), 6593-6604, database is CAplus and MEDLINE.

Oligonucleotides, peptides, and peptide nucleic acids incorporating 7-oxanorbornene as a dienophile were reacted with tetrazines linked to either a peptide, D-biotin, BODIPY, or N-acetyl-D-galactosamine. The inverse electron-demand Diels-Alder (IEDDA) cycloaddition, which was performed overnight at 37°C, in all cases furnished the target conjugate in good yields. IEDDA reactions with 7-oxanorbornenes produce a lower number of stereoisomers than that of IEDDA cycloadditions with other dienophiles.

Journal of Organic Chemistry published new progress about 10378-06-0. 10378-06-0 belongs to esters-buliding-blocks, auxiliary class Other Aliphatic Heterocyclic,Chiral,Ester,Inhibitor,Inhibitor, name is (3aR,5R,6R,7R,7aR)-5-(Acetoxymethyl)-2-methyl-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]oxazole-6,7-diyl diacetate, and the molecular formula is C14H19NO8, Application of (3aR,5R,6R,7R,7aR)-5-(Acetoxymethyl)-2-methyl-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]oxazole-6,7-diyl diacetate.

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

Fraile, Jose M. published the artcileThe influence of alkaline metals on the strong basicity of Mg-Al mixed oxides: The case of transesterification reactions, Quality Control of 110-34-9, the publication is Applied Catalysis, A: General (2009), 364(1-2), 87-94, database is CAplus.

Several Mg/Al mixed oxides, prepared by three different co-precipitation procedures, have been tested in different transesterification reactions. The catalytic activity for sunflower oil transesterification correlates with the leachable basicity, and not with the total basicity, measured by titration methods. The presence of residual alk. ions after crystallization is the main source for the strong basicity in this kind of solids, and the difficulty in the complete elimination of the alk. traces are probably the origin of the strong discrepancies in basicity detected along the literature data. The effect of these alk. traces is more evident with a more demanding reaction, such as that of Me palmitate with isobutanol. In such case the alk.-free solids did not show any catalytic activity. The nature of these strong basic sites makes the recovery problematic, given that part of the alk. cation is lost to the reaction medium, a process favored by an increase in the polarity of the medium. This fact is also a general limitation for the application of this kind of solids to liquid phase reactions requiring high basicity.

Applied Catalysis, A: General published new progress about 110-34-9. 110-34-9 belongs to esters-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Ester, name is Isobutyl palmitate, and the molecular formula is C20H40O2, Quality Control of 110-34-9.

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

Fraile, Jose M. published the artcileThe basicity of mixed oxides and the influence of alkaline metals: The case of transesterification reactions, HPLC of Formula: 110-34-9, the publication is Applied Catalysis, A: General (2010), 387(1-2), 67-74, database is CAplus.

Several M(II)/M(III) mixed oxides were prepared and tested in two different transesterification reactions, biodiesel production from sunflower oil and methanol, and the more demanding transesterification of Me palmitate with isobutanol. The presence of residual alk. ions after crystallization is the main source for the strong basicity in this kind of solids, as it happened with Mg/Al mixed oxides. The effect of these alk. traces is more evident with the most demanding reaction, in which the alk.-free solids did not show any catalytic activity. These results seem to indicate that the strong basicity in mixed oxides is always connected to the presence of alk. metals, irresp. from the nature of M(II) and M(III).

Applied Catalysis, A: General published new progress about 110-34-9. 110-34-9 belongs to esters-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Ester, name is Isobutyl palmitate, and the molecular formula is C20H40O2, HPLC of Formula: 110-34-9.

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

Astuti, Retno Dwi published the artcileThe Volatile Compounds and Aroma Description in Various Rhizopus oligosporus Solid-State Fermented and Nonfermented Rice Bran, Name: Isobutyl palmitate, the publication is Fermentation (2022), 8(3), 120, database is CAplus.

Rice bran is known to have beneficial nutrients. Current studies suggest that solid-state fermentation affects the rice bran’s volatile profile. The aim of this study is to identify the volatile compounds and aroma description of fermented and nonfermented rice bran (FRB and NFRB) of Ciherang, Inpari30, IR64 and Inpari42. The fermentation was conducted using Rhizopus oligosporus solid-state fermentation Headspace-solid phase microextraction coupled with GC/MS was performed, and the aroma was translated by 10 trained panelists through quant. descriptive anal. (QDA). The result showed that 72 and 68 compounds were identified in FRB and NFRB, resp. They are aldehydes, ketones, alcs., acids, esters, fatty acid, phenol, benzenes, furan, thiazole, pyrazines, pyridine, lactones, terpenes, and hydrocarbons. The PCA showed that FRB was dominated by alcs., whereas NFRB was dominated by aldehydes. The QDA described nine aromas, i.e., rancid, smoky, musty, grassy, green, earthy, cereal, and sweet in NFRB. The fermentation process added fermented attributes to the aroma description to FRB and enhanced the rancid, smoky, and musty aromas. These studies indicated that fermented rice bran might increase the volatile compound of rice bran. Thus, it may provide opportunities to develop the production of fermented rice bran as a functional ingredient.

Fermentation published new progress about 110-34-9. 110-34-9 belongs to esters-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Ester, name is Isobutyl palmitate, and the molecular formula is C20H40O2, Name: Isobutyl palmitate.

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

Schulz, Stefan published the artcileAn Antiaphrodisiac in Heliconius melpomene Butterflies, Recommanded Product: Isobutyl palmitate, the publication is Journal of Chemical Ecology (2008), 34(1), 82-93, database is CAplus and MEDLINE.

Gilbert (1976) suggested that male-contributed odors of mated females of Heliconius erato could enforce monogamy. The authors investigated the pheromone system of a relative, Heliconius melpomene, using chem. anal., behavioral experiments, and feeding experiments with labeled biosynthetic pheromone precursors. The abdominal scent glands of males contained a complex odor bouquet, consisting of the volatile compound (E)-β-ocimene together with some trace components and a less volatile matrix made up predominately of esters of common C₁₆– and C₁₈-fatty acids with the alcs. ethanol, 2-propanol, 1-butanol, isobutanol, 1-hexanol, and (Z)-3-hexenol. This bouquet is formed during the first days after eclosion, and transferred during copulation to the females. Virgin female scent glands do not contain these compounds The transfer of ocimene and the esters was shown by anal. of butterflies of both sexes before and after copulation. Addnl. proof was obtained by males fed with labeled D–¹³C₆– glucose. They produced ¹³C-labeled ocimene and transferred it to females during copulation. Behavioral tests with ocimene applied to unmated females showed its repellency to males. The esters did not show such activity, but they moderated the evaporation rate of ocimene. The authors’ investigation showed that β-ocimene is an antiaphrodisiac pheromone of H. melpomene.

Journal of Chemical Ecology published new progress about 110-34-9. 110-34-9 belongs to esters-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Ester, name is Isobutyl palmitate, and the molecular formula is C23H20BN, Recommanded Product: Isobutyl palmitate.

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

Wipf, Peter published the artcileSynthesis of anti-inflammatory α- and β-linked acetamido pyranosides as inhibitors of toll-like receptor 4 (TLR4), Formula: C14H19NO8, the publication is Tetrahedron Letters (2015), 56(23), 3097-3100, database is CAplus and MEDLINE.

The low-mol.-weight iso-Pr 2-acetamido-α-glucoside I (R = AcO, R¹ = H; (C34)) inhibits toll-like receptor 4 (TLR4) in enterocytes and macrophages in vitro, and reduces systemic inflammation in mouse models of endotoxemia and necrotizing enterocolitis. The authors used a Cu(II)-mediated solvolysis of anomeric oxazolines and an acid-mediated conversion of β-glucosamine- and β-galactosamine pentaacetates to generate analogs of C34 at the anomeric C and at C(4) of the pyranose ring. These compounds were evaluated for their effect on TLR4-mediated inflammatory signaling in cultured enterocytes and monocytes. Their efficacy was confirmed using a NF-κB-luciferase reporter mouse, thus establishing a structure-activity relationship (SAR) study in this series and identifying the more efficacious iso-Pr 2-acetamido-α-galactoside I (R = H, R¹ = AcO).

Tetrahedron Letters published new progress about 10378-06-0. 10378-06-0 belongs to esters-buliding-blocks, auxiliary class Other Aliphatic Heterocyclic,Chiral,Ester,Inhibitor,Inhibitor, name is (3aR,5R,6R,7R,7aR)-5-(Acetoxymethyl)-2-methyl-5,6,7,7a-tetrahydro-3aH-pyrano[3,2-d]oxazole-6,7-diyl diacetate, and the molecular formula is C4Br2N2O4S, Formula: C14H19NO8.

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

Chen, Hongtai published the artcileNanocage-Based In^III{Tb^III}₂-Organic Framework Featuring Lotus-Shaped Channels for Highly Efficient CO₂ Fixation and I₂ Capture, Application In Synthesis of 1186376-95-3, the publication is ACS Applied Materials & Interfaces (2020), 12(24), 27803-27811, database is CAplus and MEDLINE.

The exquisite combination of independent 3p [In(CO₂)₄] units and 4f [Tb₂(CO₂)₈] clusters in the presence of the designed hexatopic 2,4,6-tri(2,4-dicarboxyphenyl)pyridine ligand engenders one peculiar nanocaged In(III){Tb(III)}₂-organic framework: ({(Me₂NH₂)[InTb₂(HTDP)₂]·3DMF·3H₂O}_n, designated as NUC-5), which features dual types of lotus-shaped channels along the [100] and [110] axes with related node windows of 5.3 × 6.8 and 12.1 × 9.2 Ų, resp. To the best of our knowledge, except several coexisted 3p-4f In/Ln clusters of {In₃Ln}- and {In₃Ln₂}-based metal-organic frameworks (MOFs), NUC-5 is one novel type of In/Ln heterometallic framework. In addition, its topol. was an unprecedented 3D TAYZIC net with a Schlafli symbol of {4.⁴6²}{4.⁵6⁵}₂{4.⁶6.⁸8}. Moreover, activated NUC-5 is proved to be one efficient adsorbent for CO₂ and one recycled cycloaddition catalyst for the transformation of epoxides into related carbonates with high yields under mild conditions. Furthermore, the excellent reversible sorption performance for I₂ in the volatilization phase or in cyclohexane solution with a maximum adsorption capacity of 609.1 mg/g (3.75 iodine mols. per unit cell) makes NUC-5 a promising adsorbent for radioactive products of ¹²⁹I and ¹³¹I in the field of nuclear industry. This study provides one synthetic strategy that the original nature of MOFs could be enhanced by introducing some specific function-prompted inorganic subunits with the aid of predesigned supporting ligands.

ACS Applied Materials & Interfaces published new progress about 1186376-95-3. 1186376-95-3 belongs to esters-buliding-blocks, auxiliary class Boronic acid and ester, name is Dimethyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)isophthalate, and the molecular formula is C16H21BO6, Application In Synthesis of 1186376-95-3.

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

Chen, Hongtai published the artcileRobust Heterometallic Tb^III/Mn^II-Organic Framework for CO₂/CH₄ Separation and I₂ Adsorption, Safety of Dimethyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)isophthalate, the publication is ACS Applied Nano Materials (2020), 3(3), 2680-2686, database is CAplus.

The exquisite combination of heterometallic [Tb^IIIMn^II(CO₂)₃(H₂O)₂] clusters with the hexacarboxylate ligand of H₆TDP generates one water-stable 3D heterometallic Tb^III/Mn^II-organic framework material {[TbMn(HTDP)(H₂O)₂]·5DMF·4H₂O}_n (NUC–3; H₆TDP = 2,4,6-tri(2′,4′-dicarboxyphenyl)pyridine), which consists of functionalized noninterspersed opening nanochannels shaped by six rows of [Tb^IIIMn^II(CO₂)₃(H₂O)₂] clusters. Based on the single-component sorption measurements, activated NUC–3 framework exhibits effective CO₂/CH₄ separation associated with high uptake and moderate adsorption enthalpy of CO₂. Dynamic breakthrough experiments reveal that NUC–3 could be competent for the separation of CO₂/CH₄ (50:50, v:v) mixture Moreover, the kinetic and equilibrium experiments of iodine adsorption indicate that NUC–3 possess excellent adsorption capacity for iodine mols. in cyclohexane solution The excellent structural stability and functional internal surface makes NUC–3 a prospective adsorbent for practical CO₂/CH₄ separation and adsorption elimination of iodine mols., opening up the insight of heterometallic MOFs for pratical application.

ACS Applied Nano Materials published new progress about 1186376-95-3. 1186376-95-3 belongs to esters-buliding-blocks, auxiliary class Boronic acid and ester, name is Dimethyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)isophthalate, and the molecular formula is C16H21BO6, Safety of Dimethyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)isophthalate.

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

Chen, Hongtai published the artcileNanoporous Zn^II/Tb^III-Organic Frameworks for CO₂ Conversion, Category: esters-buliding-blocks, the publication is ACS Applied Nano Materials (2020), 3(7), 7201-7210, database is CAplus.

Creative assembly of bimetallic [Zn^IITb^III(CO₂)₃(H₂O)] clusters and the desigened bifunctional ligand of H₆TDP engendered one highly robust anionic heterometallic framework {[(CH₃)₂NH₂][Zn^IITb^III(TDP)(H₂O)]·3DMF·3H₂O}_n (NUC-7), which featured two types of nanochannels decorated with d. open metal sites and free oxygen atoms on the wall. To the best our knowledge, NUC-7 represented one novel kind of heterometallic Zn^II/Ln^III-organic 3D honeycomb MOFs with exposed tetra-coordinated Zn^II-metal sites as Lewis acid sites. Subsequent studies indicated that NUC-7 could highly adsorb CO₂ and catalyze the cycloaddition of various epoxides into related carbonates with the help of cocatalyst TBAB under lukewarm conditions of 1 atm and 80°C. Meanwhile, NUC-7 exhibited the effectively selective sensitivity for discriminating Fe³⁺ in aqueous solution by luminescence quenching. It could be inferred that the excellent characteristics including large void volume, high porosity, active open metal sites, and uncoordinated carboxylate oxygen atoms as Lewis acid and base sites rendered NUC-7 one ideal platform for gas reservoir, specific catalyst, and luminescence sensing.

ACS Applied Nano Materials published new progress about 1186376-95-3. 1186376-95-3 belongs to esters-buliding-blocks, auxiliary class Boronic acid and ester, name is Dimethyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)isophthalate, and the molecular formula is C16H21BO6, Category: esters-buliding-blocks.

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

Saxena, Mohit published the artcileA cytotoxic and hepatoprotective agent from Withania somnifera and biological evaluation of its ester derivatives, Application In Synthesis of 110-34-9, the publication is Natural Product Communications (2007), 2(7), 775-778, database is CAplus.

Detailed chem. investigation of Withania somnifera roots resulted in the isolation and identification of a cytotoxic and hepatoprotective agent, palmitic acid (1), which was converted to 8 semi-synthetic ester derivatives 2-9. T-Bu palmitate (8) and amyl palmitate (9) were 4-6 times more active than 1 against adherent and suspension colon cancer cell lines. Interestingly, palmitic acid (1) and its ester derivatives 2-9 also showed hepatoprotective activity which is being reported for the 1st time.

Natural Product Communications published new progress about 110-34-9. 110-34-9 belongs to esters-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Ester, name is Isobutyl palmitate, and the molecular formula is C20H40O2, Application In Synthesis of 110-34-9.

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