Tag: M.W=300-350

Li, Wenli published the artcileChemical composition analysis of extracts from different parts of Phallus impudicus L. growing in Guizhou province, COA of Formula: C20H40O2, the publication is Shipin Kexue (Beijing, China) (2016), 37(2), 72-76, database is CAplus.

Objective: To find out and expand the utilization potential of Phallus impudicus L. by analyzing the chem. composition of petroleum ether and ethanol extracts from its pileus, stipe and volva. Methods: The volatile components of the pileus, stipe and volva of Phallus impudicus L. were obtained by successive extraction with petroleum ether and ethanol under room temperature (25-30°C). The chem. composition of each extract was identified by gas chromatog.-mass spectrometry (GC-MS) using a polar column HP-INNOWAX. Temperature programming was as follows: initial temperature was set to 60°C hold for 2 min, followed by an increase of 10°C/min to 160°C held for 6 min, and another increase of 3°C/min to 220°C held for 17 min. The spectra were compared with those published in the mass spectral library NIST 08. Results: A total of 67 volatile components were identified from the two different solvent extracts of Phallus impudicus L., 66 compounds of which were first reported in this study. A total of 35 compounds were extracted with petroleum ether from Phallus impudicus L., 24, 18 and 18 of which were identified from the extracts of pileus, stipe and volva, resp. A total of 38 components were extracted from Phallus impudicus L. including 26, 28 and 12 compounds identified from the extracts of pileus, stipe and volva, resp. Conclusions: The presence of 9,12-octadecadienoic acid (Z,Z)-, butylated hydroxytoluene, 1,2-benzenedicarboxylic acid, bis(2-methylpropyl) ester, isosorbide, 1,2-cyclopentanedione, 2-pyrrolidinone, niacinamide, 9,12-octadecadienoic acid, and Et ester can provide the scientific basis for reasonable utilization of Phallus impudicus L.

Shipin Kexue (Beijing, China) 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, COA of Formula: C20H40O2.

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

Ni, Zi-hao published the artcileCatalytic esterification, kinetics, and cold flow properties of isobutyl palmitate, Application In Synthesis of 110-34-9, the publication is Fuel (2019), 115368, database is CAplus.

Iso-Bu palmitate was synthesized by the esterification of palmitic acid and isobutanol with pyridine Bu bisulfate ionic liquid as the catalyst in a self-designed reactor. The kinetics of the esterification and cold flow properties of biodiesel were also studied. The optimal reaction conditions for the esterification are as follows: catalyst dosage, 6%; reaction time, 60 min; molar ratio of isobutanol to palmitic acid, 5:1; and reaction temperature, 100°C. The verification test was conducted under the optimal conditions, and the esterification rate was up to 98.79%. The kinetics of catalytic esterification was analyzed. The reaction orders was 1.49; the activation energy E_a was 57.38 kJ/mol; the frequency factor A was 2.70 × 10⁷; and the reaction kinetics model was – dc_A/dt = 2.70 × 10⁷e^-(57.38/RT)c^1.49_A. The solidifying point (SP), cold filter plugging point (CFPP), and kinematic viscosity of iso-Bu palmitate obtained were 3°C, 7°C, and 4.93 mm² s^-1, resp. Compared to Me palmitate, the SP decreased by six times, and CFPP decreased by 3.28 times. Therefore, the use of branched-chain alc. instead of methanol ester exchange descaling method can effectively reduce the SP and CFPP of biodiesel to improve cold flow properties of biodiesel.

Fuel 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

Thiebaut, Benoit published the artcileApplication of headspace SPME-GC-MS in characterization of odorous volatile organic compounds emitted from magnetic tape coatings based on poly(urethane-ester) after natural and artificial ageing, Product Details of C20H40O2, the publication is Polymer Testing (2007), 26(2), 243-256, database is CAplus.

The aim of this study was to study the emission of volatile organic compounds (VOCs) in magnetic tapes after several decades of natural aging at room temperature Headspace solid-phase microextraction was used as a sample preparation technique and gas chromatog.-mass spectrometry was used to characterize the VOCs. Eight samples of polyester-based magnetic tapes having a magnetic coating made of a poly(urethane-ester) polymeric binder, various additives and magnetic particles were studied. The compounds identified in the samples were fatty acid ester lubricants, compounds from antioxidants such as 2,6-bis(1,1-dimethylethyl)-4-methyl-phenol, manufacturing byproducts such as cyclic polyester oligomers, and deterioration compounds from the magnetic coating. Homologous series of carboxylic acids, furanones and aldehydes were identified. The latter compounds were exclusively present in the magnetic coating and could be related to the odor intensity by odor sensory ranking testing. These compounds are most likely to be the source of the often reported characteristic smell.

Polymer Testing 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 C26H45N5O7Si2, Product Details of C20H40O2.

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

Zhao, Guozhong published the artcileEffect of steam explosion on physicochemical properties and fermentation characteristics of sorghum (Sorghum bicolor (L.) Moench), Product Details of C20H40O2, the publication is LWT–Food Science and Technology (2020), 109579, database is CAplus.

Steam explosion (SE) was applied to modify the physicochem. properties and fermentation characteristics of sorghum (Sorghum bicolor (L.) Moench). SEM (SEM) showed that the dense structures of sorghum especially the starch granules were destroyed, and much more folds, crimps and holes appeared in sorghum starch. Cellulose, hemicellulose and proteins in sorghum tended to decrease when the SE pressure increased which were investigated by fourier transformed IR (FTIR) spectroscopy and SDS-PAGE. SE pretreatment increased the content of reducing sugar in sorghum, and the content of reducing sugar in sorghum pretreated by SE of 2.0 MPa increased over 19 times than the control. Moreover, fermentation results indicated that the ethanol yield was over 2 times higher than the control under the pressure of 1.5 MPa. The fermentation broth increased and the fermentation residue decreased obviously by SE pretreatment than the control. The kinds and the relative contents of esters increased, especially the Et acetate. This study suggested that SE pretreatment could reduce the waste content and promote the ethanol production in the liquor industry.

LWT–Food Science and Technology 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 C8H17Br, Product Details of C20H40O2.

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

Bernardes, Goncalo J. L. published the artcileDesign, synthesis and biological evaluation of carbohydrate-functionalized cyclodextrins and liposomes for hepatocyte-specific targeting, Formula: C14H19NO8, the publication is Organic & Biomolecular Chemistry (2010), 8(21), 4987-4996, database is CAplus and MEDLINE.

Targeting glycan-binding receptors is an attractive strategy for cell-specific drug and gene delivery. The C-type lectin asialo-glycoprotein receptor (ASGPR) is particularly suitable for liver-specific delivery due to its exclusive expression by parenchymal hepatocytes. In this study, we designed and developed an efficient synthesis of carbohydrate-functionalized β-cyclodextrins (βCDs) and liposomes for hepatocyte-specific delivery. For targeting of ASGPR, rhodamine B-loaded βCDs were functionalized with glycodendrimers. Liposomes were equipped with synthetic glycolipids containing a terminal d-GalNAc residue to mediate binding to ASGPR. Uptake studies in the human hepatocellular carcinoma cell line HepG2 demonstrated that βCDs and liposomes displaying terminal d-Gal/d-GalNAc residues were preferentially endocytosed. In contrast, uptake of βCDs and liposomes with terminal d-Man or D-GlcNAc residues was markedly reduced. The d-Gal/d-GalNAc-functionalized βCDs and liposomes presented here enable hepatocyte-specific targeting. Gal-functionalized βCDs are efficient mol. carriers to deliver doxorubicin in vitro into hepatocytes and induce apoptosis.

Organic & Biomolecular 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, Formula: C14H19NO8.

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

Kim, Hye Ryun published the artcileCharacterization of yakju brewed from glutinous rice and wild-type yeast strains isolated from nuruks, SDS of cas: 110-34-9, the publication is Journal of Microbiology and Biotechnology (2010), 20(12), 1702-1710, database is CAplus and MEDLINE.

Korean traditional rice wines yakju and takju are generally brewed with nuruk as the source of the saccharogenic enzymes by natural fermentation To improve the quality of Korean rice wine, the microorganisms in the nuruk need to be studied. The objective of this research was to improve the quality of Korean wine with the wild-type yeast strains isolated from the fermentation starter, nuruk. Only strain YA-6 showed high activity in 20% ethanol. Precipitation of Y89-5-3 was similar to that of very flocculent yeast (>80%) at 75.95%. Using 18S rRNA sequencing, all 10 strains were identified as Saccharomyces cerevisiae. Volatile compounds present in yakju were analyzed by gas chromatog.-mass selective detector. The principal component anal. (PCA) of the volatile compounds grouped long-chain esters on the right side of the first principal component, PC1; these compounds were found in yakju that was made with strains YA-6, Y89-5-3, Y89-5-2, Y90-9, and Y89-1-1. On the other side of PC1 were short-chain esters; these compounds were found in wines that were brewed with strains Y183-2, Y268-3, Y54-3, Y98-4, and Y88-4. Overall, the results indicated that using different wild-type yeast strains in the fermentation process significantly affects the chem. characteristics of the glutinous rice wine.

Journal of Microbiology and Biotechnology 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, SDS of cas: 110-34-9.

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

Crasto, Curtis F. published the artcileA Practical method for preparation of β-glycosides of N-acetylglucosamine, SDS of cas: 10378-06-0, the publication is Tetrahedron Letters (2004), 45(25), 4891-4894, database is CAplus.

A mild and efficient method for preparation of GlcNAc derivatives by reaction of glycosyl acceptors with glycosyl oxazolines has been developed. The key feature is use of Yb(OTf)₃ as promoter, requiring moderate reaction times and equivalence stoichiometry. We anticipate application in the preparation of a wide range of derivatives of this biol. important class of building blocks.

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 C14H19NO8, SDS of cas: 10378-06-0.

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

Li, Ji-tao published the artcileAnalysis of aroma composition of purple sweet potato and rice wine fermented with different yeast starters, Application of Isobutyl palmitate, the publication is Shipin Kexue (Beijing, China) (2014), 35(16), 202-207, database is CAplus.

The aroma components of purple sweet potato and rice wine fermented with three different yeast starters, alc. active dry yeast and Saccharomyces cerevisiae 1383 and 1596 were analyzed. The anal. was carried out using automatic static headspace-solid phase micro-extraction-gas chromatog.-mass spectrometry. Moreover, the effect of mass ratio between purple sweet potato pulp and sacchrified sticky rice pulp on wine quality was studied. The results showed that the best mass ratio between purple sweet potato pulp and sacchrified sticky rice pulp was in the range of 3: 2-1: 1; the aroma of purple sweet potato and rice wine was composed mainly of esters, alcs., aldehydes, ketones, and alkyl vinyl. Totally 73 aroma components were identified, including 55, 54 and 55 components individually observed in the wines fermented with alc. active dry yeast, and Saccharomyces cerevisiae 1383 and 1596, resp., and 38 aroma components were common to the three wines. The most predominant aroma compound in these three wines was pentanol with relative contents of 17.67%, 17.84% and 18.63%, resp.

Shipin Kexue (Beijing, China) 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 of Isobutyl palmitate.

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

Matta, Khushi L. published the artcileSimple method for the synthesis of 2-acetamido-2-deoxy-β-D-galactopyranosides, Product Details of C14H19NO8, the publication is Carbohydrate Research (1973), 26(1), 215-18, database is CAplus.

Treatment of 2-acetamido-1,3,4,6-tetra-O-acetyl-2-deoxy-β-D- galactopyranose in CH2Cl2 with anhydrous FeCl3 gave 66% 2-methyl-(3,4,6-triO-acetyl-1,2-dideoxy-α-D-gal- actopyrano)-[2′ 1′:4,5]-2-oxazoline (I), which reacted readily with PhCH2OH and with 1,2,3-tri-O-benzoyl-α-D-galactose to give 65% benzyl β-glycoside derivative and 44% (1 → 6)-β-D-linked di- saccharide derivatives, resp.

Carbohydrate Research 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, Product Details of C14H19NO8.

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

Wu, Ying-Ta published the artcileA new N-acetylgalactosamine containing peptide as a targeting vehicle for mammalian hepatocytes via asialoglycoprotein receptor endocytosis, Formula: C14H19NO8, the publication is Current Drug Delivery (2004), 1(2), 119-127, database is CAplus and MEDLINE.

Galactoside-containing cluster ligands have high affinity for asialoglycoprotein receptors (ASGP-r), which are found in abundance in mammalian parenchymal liver cells. These ligands may be conjugated with a therapeutic drug to improve the efficiency of delivery to diseased liver cells. This report describes a new synthetic route towards clustering glycopeptides containing N-acetyl-D-galactosamine (GalNAc). The building block Fmoc-α-(ah-Ac₃GalNAc)-L-glutamate allowed access to the target compound YEEE(α-ah-GalNAc)₃, a structural mimic of YEE(ah-GalNAc)₃, via solid phase peptide synthesis (SPPS). Fatty acid, polylysine, fluorescein and biotin conjugates further demonstrate the facility of the described method. Using fluorescein labeling and ¹³¹I labeling, in vitro and in vivo assays confirmed that YEEE(α-ah-GalNAc)₃ possesses both specificity and affinity to the liver, similar to the agent YEE(ah-GalNAc)₃, which targets liver lesions. The synthesis described in this report represents a considerable improvement in synthesizing a ligand for ASGP-r by simplifying both the preparation of the starting material and the procedure for conjugating the galactosidase cluster to drugs.

Current Drug Delivery 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 C6H9BN2O2, Formula: C14H19NO8.

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