Tag: 100-200

On December 24, 2003, Polla, Magnus published a patent.Safety of 2-(Methylamino)ethan-1-ol hydrochloride The title of the patent was Preparation of 2,5-disubstituted 3-mercaptopentanoic acids as carboxypeptidase U inhibitors. And the patent contained the following:

The title compounds R1(CH2)2CH(SH)CH(CO2H)CH2R2 [I; R1 = (un)substituted Ph, naphthyl, pyridinyl, etc.; R2 = aminopyridinyl, aminothiazolyl, 3-azabicyclo[3.2.1]octyl] which inhibit carboxypeptidase U and thus can be used in the prevention and treatment of diseases where inhibition of carboxypeptidase U is beneficial, were prepared E.g., a 4-step synthesis of 2-[(6-aminopyridin-3-yl)methyl]-5-(1,1′-biphenyl-3-yl)-3-mercaptopentanoic acid (starting from 3-iodo-1,1′-biphenyl), was given. Biol. data was given for 13 exemplified compounds I. In further aspects, the invention relates to pharmaceutical compositions containing at least one compound I. The experimental process involved the reaction of 2-(Methylamino)ethan-1-ol hydrochloride(cas: 62640-03-3).Safety of 2-(Methylamino)ethan-1-ol hydrochloride

The Article related to mercaptopentanoate aminopyridinylmethyl preparation carboxypeptidase u inhibitor, Heterocyclic Compounds (One Hetero Atom): Pyridines and other aspects.Safety of 2-(Methylamino)ethan-1-ol hydrochloride

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On January 27, 2011, Bhavaraju, Sai; Karanjikar, Mukund; Joshi, Ashok; Hunt, Joel; Chitta, Pallavi published a patent.Recommanded Product: 2-Methyl-2-propylpropane-1,3-diol The title of the patent was Decarboxylation cell for production of coupled radical products. And the patent contained the following:

An electrolytic cell produces coupled radical products. The method involves obtaining a carboxylic acid material from biomass and converting it into an alkali metal salt. The alkali metal salt is then used in an anolyte as part of an electrolytic cell. The electrolytic cell may include an alkali ion conducting membrane (such as a NaSICON membrane). When the cell is operated, the alkali metal salt of the carboxylic acid decarboxylates and forms radicals. Such radicals are then bonded to other radicals, thereby producing a coupled radical product such as a hydrocarbon. The produced hydrocarbon may be, for example, saturated, unsaturated, branched, or unbranched, depending upon the starting material. The experimental process involved the reaction of 2-Methyl-2-propylpropane-1,3-diol(cas: 78-26-2).Recommanded Product: 2-Methyl-2-propylpropane-1,3-diol

The Article related to alkali metal salt decarboxylation cell coupled radical formation hydrocarbon, Electrochemistry: Electrochemical Cells and Systems and other aspects.Recommanded Product: 2-Methyl-2-propylpropane-1,3-diol

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On July 2, 2008, Kotachi, Shinji; Fukuda, Kazuyuki published a patent.Name: 2-Methyl-2-propylpropane-1,3-diol The title of the patent was Preparation and process for purifying acetal compounds in presence of antioxidants for perfumes. And the patent contained the following:

The present invention relates to (i) a process for purifying an acetal compound having a sweet floral scent and a process for producing the acetal compound, which are inhibited from generating off-odor even when subjecting the acetal compound to distillation under a low vacuum and at a high temperature; and (ii) a perfume composition containing the acetal compound In accordance with the present invention, there is provided a process for purifying an acetal compound represented by the general formula (I; R1 = H, Me, Et; R2 = Pr, iso-Pr; R3 = H, Pr, iso-Pr), the process including the step of subjecting a raw material containing the acetal compound to distillation at a temperature of 80 to 170° in the presence of an antioxidant. Thus, reaction of 396 g of 2-methyl-2-propyl-1,3-propanediol with 300 g of 2-methylpentanal in presence of 444 g of Et formate resulted in 636 g of a raw material containing 2-(1-methylbutyl)-5-methyl-5-propyl-1,3-dioxane. The raw material (100 g) was mixed with 0.1 g of 2,2′-methylenebis(4-ethyl-6-tert-butylphenol) as an antioxidant, and the mixture was subjected to distillation under such a condition that a main distillate was distilled off under a pressure of 5 to 7 kPa and at a temperature of 138 to 143°, thereby 97 g of a fraction composed of 2-(1-methylbutyl)-5-methyl-5-propyl-1,3-dioxane (purity 98.4%). As a result of analyzing the thus obtained fraction by gas chromatog., it was confirmed that no 2,2-dimethylpentyl-2-methylpentanoate as a byproduct was detected, and no fruity green off-odor was sensed. The experimental process involved the reaction of 2-Methyl-2-propylpropane-1,3-diol(cas: 78-26-2).Name: 2-Methyl-2-propylpropane-1,3-diol

The Article related to acetal compound preparation purification distillation antioxidant perfume, Essential Oils and Cosmetics: Fragrance Preparations and other aspects.Name: 2-Methyl-2-propylpropane-1,3-diol

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On March 3, 2021, Han, Yunrui; Han, Lin; He, Limin; Wang, Shipeng; Luo, Xiaoming published an article.Related Products of 143-10-2 The title of the article was Universal Criterion for Critical Motion of Droplets Adhered on Surfaces with Different Wettability in Laminar Flow. And the article contained the following:

The initial motion of micro-oil droplets on substrates immersed in water is of great significance to study droplet motion. Here, microscopic experiments and mechanism anal. are used to establish a universal criterion and a math. model describing the critical conditions for the initial motion of droplets adhered on surfaces with different wettability in the laminar flow. The authors demonstrate a surface modification technique and anal. method in a microtest. Based on the force’s anal. on the 3-phase contact points of 2-dimensional oil droplets on the surfaces, the movement mechanism is also obtained when the oil droplets start to move. This work focuses on the coupling effects of oil droplet’s height, surface properties, and water flow velocity on the initial motion behaviors of oil droplets and obtains the critical shear water flow velocity required for the critical movement of oil droplets from different surfaces. The authors achieve a universal criterion and model for different application scenarios, which are of great scientific significance to improve theor. systems of multiphase separation and guide the design and optimization of surface properties and flow field velocity. The experimental process involved the reaction of 1-Decanethiol(cas: 143-10-2).Related Products of 143-10-2

The Article related to critical motion droplet surface wettability laminar flow silicone oil, Surface Chemistry and Colloids: Solid-Liquid Systems and other aspects.Related Products of 143-10-2

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On November 30, 2021, Carlson, Shane; Becker, Maximilian; Bruenig, Florian N.; Ataka, Kenichi; Cruz, Ruben; Yu, Leixiao; Tang, Peng; Kanduc, Matej; Haag, Rainer; Heberle, Joachim; Makki, Hesam; Netz, Roland R. published an article.Quality Control of 1-Decanethiol The title of the article was Hydrophobicity of Self-Assembled Monolayers of Alkanes: Fluorination, Density, Roughness, and Lennard-Jones Cutoffs. And the article contained the following:

The interplay of fluorination and structure of alkane self-assembled monolayers and how these affect hydrophobicity are explored via mol. dynamics simulations, contact angle goniometry, and surface-enhanced IR absorption spectroscopy. Wetting coefficients are found to grow linearly in the monolayer d. for both alkane and perfluoroalkane monolayers. The larger contact angles of monolayers of perfluorinated alkanes are shown to be primarily caused by their larger mol. volume, which leads to a larger nearest-neighbor grafting distance and smaller tilt angle. Increasing the Lennard-Jones force cutoff in simulations is found to increase hydrophilicity. Specifically, wetting coefficients scale like the inverse square of the cutoff, and when extrapolated to the infinite cutoff limit, they yield contact angles that compare favorably to exptl. values. Nanoscale roughness is also found to reliably increase monolayer hydrophobicity, mostly via the reduction of the entropic part of the work of adhesion. Anal. of depletion lengths shows that droplets on nanorough surfaces partially penetrate the surface, intermediate between Wenzel and Cassie-Baxter states. The experimental process involved the reaction of 1-Decanethiol(cas: 143-10-2).Quality Control of 1-Decanethiol

The Article related to fluorination roughness hydrophobicity self assembled monolayer alkane, Surface Chemistry and Colloids: Solid-Liquid Systems and other aspects.Quality Control of 1-Decanethiol

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On March 31, 2010, Karthikeyan, K.; Balaji, T. S.; Shanmugasundaram, P.; Chandrasekara Pillai, K. published an article.Formula: C7H16O2 The title of the article was Stability-Indicating HPLC Method for the Determination of Impurities in Meprobamate with Refractive Index Detection. And the article contained the following:

The purpose of this study is to develop and validate a simple, sensitive, and robust high-performance liquid chromatog. (HPLC) method for the determination of impurities ca. 2-methyl-2-propyl-1,3-propane diol (MP0) and 2-hydroxymethyl-2-Me pentyl carbamate (MP1) in meprobamate (MEP) drug substance with refractive index (RI) detection. This method utilizes a Zorbax Eclipse XDB C18 HPLC column, a mobile phase of 80:20 (volume/volume) 10 mM KH2PO4,-acetonitrile, resp. The stability-indicating capability of the method was established by performing stress studies under acidic, basic, oxidation, light, humidity, and thermal conditions. The major degradation products of acid and base hydrolysis are identified as MP0 and MP1. The recovery data obtained for impurities are between 96.0-109.8%. The detection and quantitation limits of this method ranges from 0.009 to 0.017 mg/mL and 0.029 to 0.055 mg/mL, resp. The relative standard deviation (RSD) for the area at QL is < 6.1%. Good linearity (r2 > 0.99) and precision (RSD < 2.2%) were obtained for MEP, MP0, and MP1. This method was applied successfully to determine the content of impurities in MEP bulk drug. (c) 2010 Preston Publications. The experimental process involved the reaction of 2-Methyl-2-propylpropane-1,3-diol(cas: 78-26-2).Formula: C7H16O2

The Article related to meprobamate impurity determination rp hplc stability refractive index, Pharmaceutical Analysis: Synthetic Organic Compounds and other aspects.Formula: C7H16O2

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On July 29, 2020, Ben Amara, Fadwa; Dionne, Eric R.; Kassir, Sahar; Pellerin, Christian; Badia, Antonella published an article.Quality Control of 1-Decanethiol The title of the article was Molecular Origin of the Odd-Even Effect of Macroscopic Properties of n-Alkanethiolate Self-Assembled Monolayers: Bulk or Interface?. And the article contained the following:

Elucidating the influence of the monolayer interface vs. bulk on the macroscopic properties (e.g., surface hydrophobicity, charge transport, and electron transfer) of organic self-assembled monolayers (SAMs) chem. anchored to metal surfaces is a challenge. This article reports the characterization of prototypical SAMs of n-alkanethiolates on gold (CH3(CH2)nSAu, n = 6-19) at the macroscopic scale by electrochem. impedance spectroscopy and contact angle goniometry, and at the mol. level, by IR reflection absorption spectroscopy. The SAM capacitance, dielec. constant, and surface hydrophobicity exhibit dependencies on both the length (n) and parity (nodd or neven) of the polymethylene chain. The peak positions of the CH2 stretching modes indicate a progressive increase in the chain conformational order with increasing n between n = 6 and 16. SAMs of nodd have a greater degree of structural gauche defects than SAMs of neven. The peak intensities and positions of the CH3 stretching modes are chain length independent but show an odd-even alternation of the spatial orientation of the terminal CH3. The correlations between the different data trends establish that the chain length dependencies of the dielec. constant and surface hydrophobicity originate from changes in the polymethylene chain conformation (bulk), while the odd-even variation arises primarily from a difference in the chem. composition of the interface related to the terminal group orientation. These findings provide new phys. insights into the structure-property relation of SAMs for the design of ultrathin film dielecs. as well as the understanding of stereostructural effects on the elec. characteristics of tunnel junctions. The experimental process involved the reaction of 1-Decanethiol(cas: 143-10-2).Quality Control of 1-Decanethiol

The Article related to self assembled monolayer alkanethiolate gold structure property, Surface Chemistry and Colloids: Solid-Liquid Systems and other aspects.Quality Control of 1-Decanethiol

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On October 27, 2020, Tsvetanova, Martina; Oldenkotte, Valent J. S.; Bertolino, M. Candelaria; Gao, Yuqiang; Siekman, Martin H.; Huskens, Jurriaan; Zandvliet, Harold J. W.; Sotthewes, Kai published an article.Name: 1-Decanethiol The title of the article was Nanoscale Work Function Contrast Induced by Decanethiol Self-Assembled Monolayers on Au(111). And the article contained the following:

In this paper, we obtain maps of the spatial tunnel barrier variations in self-assembled monolayers of organosulfurs on Au(111). Maps down to the sub-nanometer scale are obtained by combining topog. scanning tunneling microscopy images with dI/dz spectroscopy. The square root of the tunnel barrier height is directly proportional to the local work function and the dI/dz signal. We use ratios of the tunnel barriers to study the work function contrast in various decanethiol phases: the lying-down striped β phase, the dense standing-up φ phase, and the oxidized decanesulfonate λ phase. We compare the induced work function variations too: the work function contrast induced by a lying-down striped phase in comparison to the modulation induced by the standing-up φ phase, as well as the oxidized λ phase. By performing these comparisons, we can account for the similarities and differences in the effects of the mechanisms acting on the surface and extract valuable insights into mol. binding to the substrate. The pillow effect, governing the lowering of the work function due to lying-down mol. tails in the striped low d. phases, seems to have quite a similar contribution as the surface dipole effect emerging in the dense standing-up decanethiol phases. The dI/dz spectroscopy map of the nonoxidized β phase compared to the map of the oxidized λ phase indicates that the strong binding of mols. to the substrate is no longer present in the latter. The experimental process involved the reaction of 1-Decanethiol(cas: 143-10-2).Name: 1-Decanethiol

The Article related to decanethiol self assembled monolayer work function gold, Surface Chemistry and Colloids: Solid-Liquid Systems and other aspects.Name: 1-Decanethiol

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On April 15, 2021, Wang, Zhaojie; Wang, Siqi; Liu, Zhang; Zhou, Binze; Wen, Yanwei; Lu, Zizhe; Chen, Rong; Shan, Bin published an article.COA of Formula: C10H22S The title of the article was Bonding behavior and passivation mechanism of organic ligands (-SH, -NH2, -COOH) on ZnS (1010) surface from first-principles calculations. And the article contained the following:

Ligand design is an important aspect of the surface engineering on the quantum dots. Organic ligands with three types of widely used function groups (-SH, -NH2, -COOH) are chosen to investigate the bonding behavior and electronic properties modification on ZnS (1010) based on first-principles calculations The thermodn. studies of (1010) ligands suggest that -SH and -COOH are prone to undergo a proton dissociation when binding on the surface, while -NH2 remains mol. adsorption on the 2-coordinated Zn atom. The binding strengths of these ligands exhibits the order of -SH > -COOH > -NH2, which is consistent with their ligand exchange ability in experiments The gap states of ZnS (1010) mainly come from 2-coordinated S/Zn, and the passivation effect of -NH2 ligand is inferior to the other two due to the absence of dissociated H which covers the 2-coordinated S. The change of ligand structures shows that ligand length has slight influence on the binding energies, while branched ligands bind more strongly on the surface than those linear ones with the same number of carbon atoms. As for the surface vacancies that cause severe trap states, the ligands tend to be located at bridge sites between two 2-coordinated Zn rather than filling the vacancies. Our study provides an insight into the bonding behavior and passivation mechanism of typical ligands on II-VI QDs at the at. level and gives helpful guidance for surface engineering aimed at improving QD performance. The experimental process involved the reaction of 1-Decanethiol(cas: 143-10-2).COA of Formula: C10H22S

The Article related to zinc sulfide selenide surface passivation adsorption, Surface Chemistry and Colloids: Solid-Liquid Systems and other aspects.COA of Formula: C10H22S

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On May 27, 2022, Shubhashish, Shubhashish; Amin, Alireza S.; Dang, Yanliu; Karasik, Sarah J.; Khanna, Harshul S.; Suib, Steven L. published an article.Reference of Pentane-1,5-diol The title of the article was Synthesis of Highly Porous Metal Oxide Nanoparticles for Adsorption Applications. And the article contained the following:

Herein, we report a general and straightforward synthesis method for large-pore highly mesoporous metal oxide nanoparticles via a modified inverse micelle formation. The role of diols as solvents has been demonstrated and extended to other metal oxides using ethylene glycol. After scanning most of the metals from the periodic table, magnesium and calcium from the s-block; tin from the p-block; vanadium, nickel, zinc, zirconium, and hafnium from the d-block; and lanthanum and cerium from the f-block elements, all these have been successfully synthesized as large-pore-diameter metal oxides. Because of thermodn. stability of chelate formation, ethylene glycol, 1,3-propanediol, 1,4-butanediol, and 1,5-pentanediol give a higher pore diameter, whereas a further increase in the diol carbon chain (1,6-hexanediol and 1,12-dodecanediol) leads to pore contraction. By varying the synthesis temperature, the effect of viscosity on the pore diameter has also been demonstrated. Potential applications of oxides of magnesium have been tested for carbon dioxide capture and adsorption of macromols. such as proteins and lipids and small mols. such as curcumin, dopamine, and sucrose. As predicted, larger-pore-diameter and higher-pore-volume mesoporous magnesium oxide shows higher carbon dioxide capture and adsorption compared to com. magnesium oxide. A mechanism for the higher pore diameters of mesoporous metal oxide nanomaterials has been proposed based on the results and previous reported literature studies. The experimental process involved the reaction of Pentane-1,5-diol(cas: 111-29-5).Reference of Pentane-1,5-diol

The Article related to mesoporous particle oxide adsorption catalyst glycol, Surface Chemistry and Colloids: Solid-Liquid Systems and other aspects.Reference of Pentane-1,5-diol

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