Category: alcohols-buliding-blocks

Ramesh, Madhan published the artcileHalf-Sandwich η6-p-Cymene) Ruthenium(II) complexes bearing 5-Amino-1-Methyl-3-Phenylpyrazole Schiff base ligands: Synthesis, structure and catalytic transfer hydrogenation of ketones, Related Products of alcohols-buliding-blocks, the main research area is ruthenium Schiff base complex preparation; alc preparation; ketone transfer hydrogenation ruthenium catalyst.

New (η6-p-cymene)ruthenium(II) complexes containing Schiff base ligands of the general composition [RuCl(η-p-cymene)(L)] were synthesized and screened for their efficiency as catalysts in the transfer hydrogenation of various ketones to alcs. RCH(OH)R1 [R = Et, Ph, 4-ClC6H4, etc.; R1 = Me, Et, Ph; RR1 = (CH2)4, (CH2)5] showing excellent conversion up to 99%. The complexes were characterized by anal. and spectral (FT-IR, UV-Vis, 1H NMR and 13C NMR) methods and the mol. structure of complex I was determined by single crystal X-ray diffraction studies, revealing a pseudo-octahedral piano stool geometry around ruthenium(II) ion. Under the optimized conditions, the influence of base, reaction temperature and substrate scope was also reported.

Journal of Organometallic Chemistry published new progress about Alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Related Products of alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Kaur, Tejinder published the artcileComparison of glycoprofiles of rituximab versions licensed for sale in India and an analytical approach for quality assessment, Synthetic Route of 59-23-4, the main research area is glycoprofile rituximab analytical approach quality assessment; Biosimilars; Glycosylation; Monoclonal antibodies; N-Glycans; Rituximab.

Glycosylation affects clin. efficacy and safety; therefore, is a critical quality attribute of therapeutic monoclonal antibodies. Glycans are often labile and complex in patterns, giving rise to macro- and micro-heterogeneity. Recombinant production, diverse geog. locations, associated transportation and storage conditions further compound the problem. Two-way studies comparing glycoprofile of the originator and its given biosimilar are aplenty. However, the extent of anal. variation and similarity in glycoprofile across all approved versions of a drug is hardly explored. Using UHPLC and mass spectrometry, we compared the glycoprofiles of eight rituximab drug samples licensed for sale in India. While the types of glycans were found identical, the abundance of some glycans varied significantly within the tested population. The quality range of glycosylation parameters of the tested sample population differed significantly from the previously established values for US/EU licensed rituximab. As the mean abundance of the 90% of identified glycans falls within ±3SD, the extent of mutual variations amongst tested lots is less significant compared to the extreme deviation from previously established QR limits. Thus, we propose this approach as an orthogonal method to capture glycan variations in licensed versions of mAbs for quality surveillance and in cases where originator samples′ are limiting. As fluctuation in glycosylation may be of clin. significance, we identify that a one-to-one comparison with originator alone is insufficient in sensing the extent of variations in glycosylation parameters in licensed biosimilars of a given therapeutic mAb. Here we propose that future biosimilarity anal. may include an orthogonal approach of generating an addnl. combined QR range representing variations across the originator and its biosimilars. The glycosylation profiles of eight rituximab drug samples of different make obtained from the point of sale in India were found identical amongst the tested rituximab versions. However, the QR limits corresponding to important glycosylation parameters differed significantly across all tested samples from the previously established QR limits of US- and EU-licensed rituximab in statistical terms. Such an approach may be useful in defining the true range of glycan variations in licensed versions of therapeutic mAbs.

Journal of Proteomics published new progress about Antibody mimetics Role: ANT (Analyte), ANST (Analytical Study). 59-23-4 belongs to class alcohols-buliding-blocks, name is (2R,3S,4S,5R)-2,3,4,5,6-Pentahydroxyhexanal, and the molecular formula is C6H12O6, Synthetic Route of 59-23-4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Bole, Leonie J. published the artcileUntangling the Complexity of Mixed Lithium/Magnesium Alkyl/Alkoxy Combinations Utilised in Bromine/Magnesium Exchange Reactions, Quality Control of 2212-32-0, the main research area is lithium magnesium alkyl alkoxy bromine exchange reaction reactivity substitution; crystal structure mol lithium magnesium alkyl alkoxy complex preparation; alkoxides; bromine/magnesium exchange; lithium; magnesium; mixed-aggregates.

While it is known that the addition of Group 1 alkoxides to s-block organometallics can have an activating effect on reactivity, the exact nature of this effect is not that well understood. Here we describe the activation of sBu2Mg towards substituted bromoarenes by adding one equivalent of LiOR (R = 2-ethylhexyl), where unusually both sBu groups can undergo efficient Br/Mg exchange. Depending on the substitution pattern on the bromoarene two different types of organometallic intermediates have been isolated, either a mixed aryl/alkoxide [{LiMg(2-FG-C6H4)2(OR)}2] (FG = OMe; NMe2) or a homoaryl [(THF)4Li2Mg(4-FG-C6H4)4] (FG = OMe, F). Detailed NMR spectroscopic studies have revealed that these exchange reactions and the formation of their intermediates are controlled by a new type of bimetallic Schlenk-type equilibrium between heteroleptic [LiMgsBu2(OR)], alkyl rich [Li2MgsBu4] and Mg(OR)2, with [Li2MgsBu4] being the active species performing the Br/Mg exchange process.

Angewandte Chemie, International Edition published new progress about Aryl bromides Role: RCT (Reactant), RACT (Reactant or Reagent). 2212-32-0 belongs to class alcohols-buliding-blocks, name is N2-(2-Hydroxyethyl)-N1,N1,N2-trimethyl-1,2-ethylenediamine, and the molecular formula is C7H18N2O, Quality Control of 2212-32-0.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Hartman, Coral published the artcileBiodegradable polymer coating for controlled release of hydrophobic functional molecules from cotton fabrics, Application In Synthesis of 7575-23-7, the main research area is biodegradable polymer coating cotton fabrics hydrophobic functional mol.

Abstract: Despite major advances in polymer chem., cotton still remains the principal textile component in the global pharmaceutical industry owing to its intrinsic strength, thermal stability, biocompatibility, and pleasant texture. Nevertheless, the hydrophilic nature of cotton requires the development of strategies for the incorporation of hydrophobic functional mols. into the fabric for controlled-release applications. To address this issue, we designed biodegradable crosslinked poly(β-amino ester) (PBAE) coatings as reservoirs for the incorporation of small hydrophobic mols. and studied their release profiles under physiol. conditions. Two PBAEs with different hydrophobic and degradation properties were prepared and crosslinked to cotton fabrics in the presence of azulene, which served as a model hydrophobic, active material. Optimization of the crosslinking process in terms of UV curing time and the amount of solvent revealed that curing time of 15 min using 0.5 mL of chloroform was the optimal crosslinking condition. The coatings were characterized by FTIR, XPS, and SEM as well as TGA and DSC analyses. Sustained release of azulene was observed, and there was a correlation between azulene delivery rates and the hydrophobicity of the coating. These results provide a potentially useful platform for the rational design of cotton-based controlled-release systems for bioactive mol. delivery applications.

Journal of Coatings Technology and Research published new progress about Azulenes Role: SPN (Synthetic Preparation), PREP (Preparation). 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Application In Synthesis of 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Singh, Sangh Priya published the artcileSynthesis of β- and γ-lactam fused dihydropyrazinones from Ugi adducts via a sequential ring construction strategy, Computed Properties of 22483-09-6, the main research area is amino oxophenylethyl dimethoxyethyl phenylpropiolamide regioselective cycloisomerization; diphenyl pyrrolopyrazinedione preparation; benzylidene phenyl diazabicyclooctenedione preparation.

A modular approach for the construction of β- and γ-lactam fused dihydropyrazinones from the readily available Ugi adducts was described. The sequential construction of rings through base-mediated cycloisomerization followed by acid-mediated cyclization yielded β-lactam fused dihydropyrazinones. However, the Ugi-derived dihydropyrazinones afforded γ-lactam fused dihydropyrazinones under base-mediated cycloisomerization. The regioselectivity in the cycloisomerization reactions was explained on the basis of ring-strain. Substrate scope, limitations and mechanistic investigations through DFT-calculations was explored.

Chemical Communications (Cambridge, United Kingdom) published new progress about Benzaldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 22483-09-6 belongs to class alcohols-buliding-blocks, name is 2,2-Dimethoxyethanamine, and the molecular formula is C4H11NO2, Computed Properties of 22483-09-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Khodadadi, Meysam published the artcileOne-pot synthesis of novel spirocyclic-dihydropyrazine-2-(1H)ones through a Ugi 4-CR/deprotection, Recommanded Product: 2,2-Dimethoxyethanamine, the main research area is cycloalkanone benzoic acid isocyanocyclohexane dimethoxyethanamine tandem Ugi cyclization deprotection; benzoyl cyclohexyl spirodihydropyrazinone preparation.

A one-pot approach for the synthesis of new spirocyclic-dihydropyrazine-2-(1H)ones was described. The Ugi four-component condensation of cycloalkanones, carboxylic acids, cyclohexyl isocyanide and aminoacetaldehyde di-Me acetal followed by acid-catalyzed deprotection-cyclization afforded the desired products in moderate to good yields.

Journal of Heterocyclic Chemistry published new progress about Benzoic acids Role: RCT (Reactant), RACT (Reactant or Reagent). 22483-09-6 belongs to class alcohols-buliding-blocks, name is 2,2-Dimethoxyethanamine, and the molecular formula is C4H11NO2, Recommanded Product: 2,2-Dimethoxyethanamine.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Kurakake, Masahiro published the artcileSynthesis of New Glycosides by Transglycosylation of N-Acetylhexosaminidase from Serratia marcescens YS-1, Category: alcohols-buliding-blocks, the main research area is oligosaccharide acetamidodeoxy glycoside synthesis enzymic transglycosylation acetylhexosaminidase Serratia marcescens.

Serratia marcescens YS-1, a chitin-degrading microorganism, produced mainly N-acetylhexosaminidase. The purified enzyme had an optimal pH of ∼8-9 and remained stable at 40 °C for 60 min at pH 6-8. The optimum temperature was around 50 °C, and enzyme activity was relatively stable below 50 °C. YS-1 N-acetylhexosaminidase hydrolyzed p-nitrophenyl β-N-acetylgalactosamide by 28.1% relative to p-nitrophenyl β-N-acetylglucosamide. The N-acetylchito-oligosaccharides were hydrolyzed more rapidly, but the cellobiose and chitobiose of disaccharides that had the same β-1,4 glycosidic bond as di-N-acetylchitobiose were not hydrolyzed. YS-1 N-acetylhexosaminidase efficiently transferred the N-acetylglucosamine residue from di-N-acetylchitobiose (substrate) to alcs. (acceptor). The ratio of transfer to methanol increased to 86% in a reaction with 32% methanol. N-Acetylglucosamine was transferred to the hydroxyl group at C1 of mono-alcs. A di-alc. was used as an acceptor when the carbon number was more than 4 and a hydroxyl group existed on each of the two outside carbons. Sugar alcs. with hydroxyl groups in all carbon positions were not proper acceptors.

Journal of Agricultural and Food Chemistry published new progress about Disaccharides Role: RCT (Reactant), RACT (Reactant or Reagent). 64519-82-0 belongs to class alcohols-buliding-blocks, name is (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol, and the molecular formula is C12H24O11, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Blinkovsky, Alexander M. published the artcileEnzymic derivatization of saccharides and their chemical polymerization, Recommanded Product: (2R,3R,4S,5R,6R)-2-(Allyloxy)-6-(hydroxymethyl)tetrahydro-2H-pyran-3,4,5-triol, the main research area is propargyl galactopyranoside preparation polymerization; allyl galactopyranoside preparation polymerization; hydrophilic polymer sugar; oligosaccharide transglycosidation enzymic propargyl allyl alc.

The enzymic synthesis of sugar-based acetylene and ethylene derivatives as precursors to hydrophilic polymers is described. Propargyl and allyl alcs. have been used as glycosyl acceptors in the transglycosylation reactions of glycosidases with various disaccharides including lactose, maltose, and cellobiose. Reaction of propargyl and allyl alcs. with lactose catalyzed by β-galactosidase resulted in the formation of propargyl-β-D-galactopyranoside and allyl-β-D-galactopyranoside in 42 and 13% yields, resp. Polymerization of propargyl-β-D-galactopyranoside with AlBr3 in ethanol resulted in the formation of oligomeric poly(acetylenic) species (MW = 1,300). Free radical polymerization of allyl-β-D-galactopyranoside in DMF or water resulted in poly(ethylenic) species with MW > 30,000. The combined enzymic and chem. reactions inherent in these syntheses provide a unique approach in the preparation of hydrophilic polymers containing sugars and their derivatives

Tetrahedron: Asymmetry published new progress about Disaccharides Role: RCT (Reactant), RACT (Reactant or Reagent). 2595-07-5 belongs to class alcohols-buliding-blocks, name is (2R,3R,4S,5R,6R)-2-(Allyloxy)-6-(hydroxymethyl)tetrahydro-2H-pyran-3,4,5-triol, and the molecular formula is C9H16O6, Recommanded Product: (2R,3R,4S,5R,6R)-2-(Allyloxy)-6-(hydroxymethyl)tetrahydro-2H-pyran-3,4,5-triol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Pan, Liangkun published the artcileLewis Base Catalyzed Dioxygenation of Olefins with Hypervalent Iodine Reagents, Formula: C8H9BrO2, the main research area is diol preparation; acetal regioselective preparation; alkene dioxygenation catalyst phenyliodine bis trifluoroacetate.

1,2-Diols were extremely useful building blocks in organic synthesis. Hypervalent iodine reagents were useful for the vicinal dihydroxylation of olefins to gave 1,2-diols under metal-free conditions, but strongly acidic promoters were often required. Herein, synthesis of 1,2-diols R1CHOHCHOHR2 [R1 = n-hexyl, Ph, Bn, etc.; R2 = H, Ph] and acetals R3CH2CH(OMe)2 [R3 = Ph, 4-MeOC6H4, (4-acetoxyphenyl), etc.] via catalytic vicinal dioxygenation of olefins with hypervalent iodine reagents using Lewis bases as catalysts was reported. The conditions were mild and compatible with various functional groups.

Organic Letters published new progress about Acetals Role: SPN (Synthetic Preparation), PREP (Preparation). 92093-23-7 belongs to class alcohols-buliding-blocks, name is 1-(4-Bromophenyl)ethane-1,2-diol, and the molecular formula is C8H9BrO2, Formula: C8H9BrO2.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Weber, Stefan published the artcileRethinking Basic Concepts-Hydrogenation of Alkenes Catalyzed by Bench-Stable Alkyl Mn(I) Complexes, Recommanded Product: 3-Pentanol, the main research area is alkene hydrogenation alkyl manganese complex catalyst.

An efficient additive-free manganese-catalyzed hydrogenation of alkenes to alkanes with mol. hydrogen is described. This reaction is atom economic, implementing an inexpensive, earth-abundant nonprecious metal catalyst. The most efficient precatalyst is the bench-stable alkyl bisphosphine Mn(I) complex fac-[Mn(dippe)(CO)3CH2CH2CH3Pr]. The catalytic process is initiated by migratory insertion of a CO ligand into the Mn-alkyl bond to yield an acyl intermediate which undergoes rapid hydrogenolysis to form the active 16e Mn(I) hydride catalyst [Mn(dippe)(CO)2(H)]. A range of mono- and disubstituted alkenes were efficiently converted into alkanes in good to excellent yields. The hydrogenation of 1-alkenes and 1,1-disubstituted alkenes proceeds at 25°, while 1,2-disubstituted alkenes require a reaction temperature of 60°. In all cases, a catalyst loading of 2 mol % and a hydrogen pressure of 50 bar were applied. A mechanism based on DFT calculations is presented, which is supported by preliminary exptl. studies.

ACS Catalysis published new progress about Alkanes Role: SPN (Synthetic Preparation), PREP (Preparation). 584-02-1 belongs to class alcohols-buliding-blocks, name is 3-Pentanol, and the molecular formula is C5H12O, Recommanded Product: 3-Pentanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts