Tag: M.W=100-150

Furuyama, Taniyuki published the artcileCationic axial ligands on sulfur substituted silicon(IV) phthalocyanines: improved hydrophilicity and exceptionally red-shifted absorption into the NIR region, SDS of cas: 2212-32-0, the main research area is sulfur silicon phthalocyanine hydrophilicity absorption.

Herein, we report the exceptionally red-shifted absorption of sulfur-substituted silicon(IV) phthalocyanines upon introduction of cationic axial ligands. The Q band was red-shifted to approx. 900 nm with improved hydrophilicity by the combination of peripheral sulfur substituents and axial ammonium ligands. One such phthalocyanine exhibited remarkable photocytotoxicity upon irradiation with NIR light (∼810 nm) in live cells.

Chemical Communications (Cambridge, United Kingdom) published new progress about Absorption spectra. 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, SDS of cas: 2212-32-0.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Oh-e, Masahito published the artcileInteractions Between Hydrated Cerium(III) Cations and Carboxylates in an Aqueous Solution: Anomalously Strong Complex Formation with Diglycolate, Suggesting a Chelate Effect, Safety of 2,2′-Oxydiacetic acid, the main research area is hydrated cerium cation carboxylate aqueous solution; anomalously strong complex diglycolate chelate.

Interactions between hydrated Ce3+ and various carboxylates are of fundamental interest. Anomalously strong interactions with Ce3+ occur when diglycolic acid (DGA) is added into a Ce3+ aqueous solution, unlike various other carboxylic acids. Herein, the complex-formation constants of Ce3+ with these acids are evaluated via absorption and emission spectra. Hydrated Ce3+ emits fluorescence with unity quantum yield; however, addition of various carboxylates statically quenches the fluorescence when Ce3+-carboxylate complexes form because the fluorescence lifetime is constant irresp. of the carboxylate concentration In the observed static quenching, the complex-formation constants obtained from the absorption and emission spectra (Kabs and Kem) agree well. The binding of Ce3+ by the conjugate Lewis bases, i.e., carboxylates, is approx. inversely proportional to the pH. Adding DGA into the system also statically quenches the fluorescence, but far more efficiently, even in a much weaker solution We rigorously deduce Kabs and Kem of Ce3+ with DGA without any approximation using comparable concentrations Careful fittings provide equivalent Kem and Kabs values, and by varying the pH and ionic strength, we confirm that this equivalence is an inherent property of the Ce3+-DGA system. The Lewis acid-base theory cannot explain why DGA binds to Ce3+ ~1000 times more strongly than the other carboxylates. This anomalously strong binding may be due to a chelate effect caused by the DGA’s central oxygen atom, which forms a five-membered ring with the conjugate Lewis bases of DGA; double chelate rings can also form, while bis-deprotonated DGA binds to Ce3+, facilitated by the central oxygen. Therefore, DGA enables efficient quenching through the chelate effect when it binds to Ce3+.

ACS Omega published new progress about Absorption spectra. 110-99-6 belongs to class alcohols-buliding-blocks, name is 2,2′-Oxydiacetic acid, and the molecular formula is C4H6O5, Safety of 2,2′-Oxydiacetic acid.

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

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

Derasp, Joshua S. published the artcileRhodium-Catalyzed Synthesis of Amides from Functionalized Blocked Isocyanates, Quality Control of 22483-09-6, the main research area is rhodium catalyst coupling boroxine blocked masked isocyanate; synthesis amide.

Isocyanates are useful building blocks for the synthesis of amides, although their widespread use has been limited by their high reactivity, which often results in poor functional group tolerance and a propensity to oligomerize. Herein, a rhodium-catalyzed synthesis of amides is described coupling boroxines with blocked (masked) isocyanates. The success of the reaction hinges on the ability to form both the isocyanate and the organorhodium intermediates in situ. Relying on masked isocyanate precursors and on the high reactivity of the organorhodium intermediate results in broad functional group tolerance, including protic nucleophilic groups such as amines, anilines, and alcs.

ACS Catalysis published new progress about Amides Role: SPN (Synthetic Preparation), PREP (Preparation). 22483-09-6 belongs to class alcohols-buliding-blocks, name is 2,2-Dimethoxyethanamine, and the molecular formula is C4H11NO2, Quality Control of 22483-09-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Putra, T. W. published the artcileIntensification of biolubricant synthesis from waste cooking oil using tetrahydrofuran as co-solvent, Quality Control of 111-87-5, the main research area is intensification biolubricant synthesis waste cooking oil THF cosolvent.

In this study, biolubricant was synthesized through two stages of transesterification. The first transesterification was the reaction between waste cooking oil and ethanol using sodium hydroxide as catalyst to produce fatty acid Et esters (FAEE). The second transesterification was the reaction between FAEE and 1-octanol using potassium hydroxide as catalyst with THF as co-solvent to produce fatty acid octyl esters (biolubricant). This study was focused on the effect of THF as co-solvent in the second transesterification. Biolubricant yield of 94.42% was obtained at reaction conditions (temperature of 125°C, time of 180 min, reactant molar ratio of 1:4, catalyst amount of 1%-weight/weight, vacum pressure of 100 mmHg and co-solvent amount of 25%-weight/weight). The physicochem. properties of biolubricant were kinematic viscosities of 10.47 mm2/s and 2.75 mm2/s at 40°C and 100°C, viscosity index of 103 and acid number of 0.62 mg KOH/g.

IOP Conference Series: Materials Science and Engineering published new progress about Edible oils Role: RCT (Reactant), RACT (Reactant or Reagent). 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Quality Control of 111-87-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Farsang, Evelin published the artcileAnalysis of non-ionic surfactant triton X-100 using hydrophilic interaction liquid chromatography and mass spectrometry, Related Products of alcohols-buliding-blocks, the main research area is Triton X 100 hydrophilic interaction liquid chromatog mass spectrometry; gradient optimization; hydrophilic interaction liquid chromatography; non-ionic surfactant; octylphenol–polyethoxylate.

It is well known that surfactants increase the solubility of hydrophobic organic compounds and cause adverse environmental effects. The removal of these compounds from the contaminated soil or ground-water is particularly difficult due to their water soluble feature. In this work, an ultra-high performance hydrophilic interaction liquid chromatog. method was developed for the separation of oligomers of Triton X-100 octylphenol-polyethoxylate non-ionic surfactant. Liquid chromatog.-mass spectrometry (LC-MS) was used to identify the Triton X-100 compounds There was a 44 mass unit difference between two adjacent peaks that is the molar mass of one ethylene oxide group (-CH2CH2O-). A quadratic retention model was applied for the estimation of retention of the examined non-ionic surfactant and the optimization of gradient elution conditions. The optimized method was suitable for the baseline separation of 28 Triton X-100 oligomers in five minutes.

Molecules published new progress about Hydrophilic interaction liquid chromatographic stationary phases. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Related Products of alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Moore, Peter W. published the artcileHydrogen-Bonding Interactions in the Ley-Griffith Oxidation: Practical Considerations for the Synthetic Chemist, HPLC of Formula: 111-87-5, the main research area is aldehyde preparation hydrogen bonding Ley Griffith oxidation primary alc.

The Ley-Griffith oxidation, which is catalyzed by tetra-n-propylammonium perruthenate (TPAP, nPr4N[RuO4]), is a popular method for not only controlled oxidation of primary alcs. to aldehydes, but also a host of other synthetically useful transformations. While the fundamental reaction mechanism has recently been elucidated, several key hydrogen-bonding interactions between the reagents were implicated but not investigated. Herein the prevalence of H-bonding between the co-oxidant N-methylmorpholine N-oxide (NMO), the alc. substrate, water and the perruthenate catalyst is established. These observations help to rationalize the importance of drying the reagents and lead to several practical suggestions.

European Journal of Organic Chemistry published new progress about Aldehydes Role: SPN (Synthetic Preparation), PREP (Preparation). 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, HPLC of Formula: 111-87-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Lagerspets, Emi published the artcileSchiff base Cu(I) catalyst for aerobic oxidation of primary alcohols, Name: 3-(Methylthio)propan-1-ol, the main research area is copper Schiff base complex catalyst preparation; aldehyde preparation; alc aerobic oxidation copper Schiff base complex catalyst.

New copper(I)-Schiff base complexes were reported for the selective aerobic oxidation of primary alcs. to aldehydes RCHO [R = (CH2)6, Ph, (CH2)2Ph, etc.] under ambient conditions. Particularly, the copper(I) complex bearing N-(4-fluorophenyl)-1-(furan-2-yl)methanimine showed high activity in the series and gave near- quant. yields in the oxidations of benzyl alc. (99% yield in 1 h) and 1-octanol (96% yield in 24 h). Based on the X-ray structure determination, the complex had a square pyramidal coordination accomplished by two N-(4-fluorophenyl)-1-(furan-2-yl)methanimine ligands and bromide as a counter anion. The oxidation reactions were monitored with UV-vis and in situ ATR-IR spectroscopy to study the changes in the catalytic structure and to elucidate the catalytic properties and the mechanistic details. Accordingly, detachment of one of the N-(4-fluorophenyl)-1-(furan-2-yl)methanimine ligands from the complexes was related to the oxidation activity.

Molecular Catalysis published new progress about Aldehydes Role: SPN (Synthetic Preparation), PREP (Preparation). 505-10-2 belongs to class alcohols-buliding-blocks, name is 3-(Methylthio)propan-1-ol, and the molecular formula is C4H10OS, Name: 3-(Methylthio)propan-1-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts