Month: January 2023

Catalytic hydrogenation of fine chemicals: sorbitol production was written by van Gorp, K.;Boerman, E.;Cavenaghi, C. V.;Berben, P. H.. And the article was included in Catalysis Today in 1999.Quality Control of (2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate This article mentions the following:

Historically, skeletal nickel is the catalyst of choice in the production of sorbitol on industrial scale. A disadvantage of the use of skeletal nickel in the hydrogenation of glucose containing feedstocks to sorbitol, is the fact that a part of the nickel leaches. As a consequence, purification of the sorbitol is required, which renders this process economically less attractive. To meet the demand for non-leaching catalyst systems, ruthenium on carbon catalyst are presently becoming more important. In this paper, a comparison is made between different 5% Ru on carbon catalysts in the hydrogenation of a dextrose monohydrate and a very high maltose feedstock. The influence of the carbon support, the ruthenium metal location, and the applied ruthenium precursor are investigated. For comparison reasons, both skeletal Ni and Ru catalysts have been applied in the hydrogenation of dextrose to sorbitol. The effect of reaction temperature and pressure during the hydrogenation of a very high maltose containing feedstock is also investigated. It is shown that Ru catalysts are suitable alternatives for skeletal Ni catalysts in respect to re-usability, activity and selectivity. In the experiment, the researchers used many compounds, for example, (2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate (cas: 14431-43-7Quality Control of (2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate).

(2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate (cas: 14431-43-7) belongs to tetrahydropyran derivatives. Tetrahydropyran is an important raw material and intermediate used in Organic Synthesis, Pharmaceuticals, Agrochemicals and dyestuff. The bismuth chloride-assisted cross-cyclization between homoallylic alcohols and epoxides provided various benzyl tetrahydropyran derivatives. The reaction afforded good yields of desired products and occurred under mild conditions.Quality Control of (2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate

Referemce:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

Distribution of radiation-induced radicals in some hexoses was written by Neubacher, Harald. And the article was included in Zeitschrift fuer Naturforschung, Teil B: Anorganische Chemie, Organische Chemie, Biochemie, Biophysik, Biologie in 1969.Reference of 14431-43-7 This article mentions the following:

α-D-Glucose, D-glucose monohydrate, β-D-glucose, D-glucuronic acid, and α-D-methyl glucoside crystals were x-ray irradiated (2-10 megarads) at 20° in air. ESR spectra were recorded. With increasing dose, relaxation times (T1) decreased. With increasing field strength, saturation was quickly approached. Saturation concentration of radicals increased with dose. Maximum signal was obtained at microwave field strength H11 = 2/[γ(T1T2)1/2], where γ is the gyromagnetic ratio for free electrons, T1 and T2 are spin-lattice and spin-spin relaxation times, resp. The dependence of relaxation time on radical concentration is presented graphically. T1 is of the order 10-5 sec and is concentration dependent. The radicals form clusters along ionization bands, and with increasing dose, local concentrations of the radicals become very large and the relaxation times then become constant In the experiment, the researchers used many compounds, for example, (2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate (cas: 14431-43-7Reference of 14431-43-7).

(2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate (cas: 14431-43-7) belongs to tetrahydropyran derivatives. Tetrahydropyran is a useful synthetic intermediate. Tetrahydropyranyl (THP-) ethers derived from the reaction of alcohols and dihydropyran are common intermediates in organic synthesis. One classic procedure for the organic synthesis of tetrahydropyran is by hydrogenation of the 3,4-isomer of dihydropyran with Raney nickel.Reference of 14431-43-7

Referemce:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

Observation of process of melting of glucose and lactose on heating by differential scanning calorimetry and microscopy was written by Sakamoto, Kaoru;Kishihara, Shiro;Sakuda, Harumi;Miura, Kayoko;Koizumi, Yae;Yamamura, Eiko. And the article was included in Seito Gijutsu Kenkyu Kaishi in 2008.Electric Literature of C6H14O7 This article mentions the following:

We have reported that in spite of the fact that the purity of com. granulated sugar is higher than 99.9% the sugars from different refineries have different m.ps., and also that they showed different melting profiles and different colored brown. These facts are a very curious phenomenon, when considering that crystal substances generally have their own specific m.ps. We looked at crystals of D-glucose and D-lactose instead of sucrose in this study. By differential scanning calorimetry (DSC) and microscopy, the process of melting by heating the two sugar crystals was observed Also by using a scanning electron micro-scope, the surface of the crystals was observed The m.p. of α-D-glucose monohydrate is accepted as 83° in the literature. For the α-D-glucose monohydrate used in this study, three peaks on the DSC endothermic curve were observed at around 80°, 122° and 154°. However, on heating the α-D-glucose monohydrate, the crystal did not melt at 83°, and melted partially at 126° and completely at 158°. The temperature, at which the crystal melted completely, was close to m.p. of β-D-glucose anhydride in the literature. The m.p. of α-D-lactose monohydrate in the literature is 201-202°. The DSC-endothermic curves for the crystals of the α-D-lactose monohydrate used in this study had two sharp peaks at 146° and 219°. In the microscopic observation, melting of the crystals was not observed at the temperature (146°) of the first peak on the DSC endothermic curve nor at the m.p. (201-202°) reported in the literature. It was observed that α-D-lactose monohydrate began to turn brown, and began to partially melt at around the second peak (219°) and completely melted at 229°. After the α-D-glucose monohydrate and the α-D-lactose monohydrate were dried at 105° and 120°, resp., the resp. first peaks had a tendency to disappear or become small. On the observation with scanning electron microscope, both of the dried mono-hydrates had a lot of cracks on the crystal surface, which were possibly caused by the release of water mols. from the interior of the crystals. In the experiment, the researchers used many compounds, for example, (2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate (cas: 14431-43-7Electric Literature of C6H14O7).

(2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate (cas: 14431-43-7) belongs to tetrahydropyran derivatives. Dihydropyrans and tetrahydropyrans are examples of cyclic ethers widespread in nature. The most notable anticancer agent, bryostatin, and eribulin are marine macrolides having intriguing tetrahydropyran and furan motif. Electric Literature of C6H14O7

Referemce:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

Conducting Redox Polymer-Based Reagentless Biosensors Using Modified PQQ-Dependent Glucose Dehydrogenase was written by Habermueller, Katja;Reiter, Sabine;Buck, Harvey;Meier, Thomas;Staepels, Johnny;Schuhmann, Wolfgang. And the article was included in Microchimica Acta in 2003.Related Products of 14431-43-7 This article mentions the following:

Reagentless, oxygen-independent glucose biosensors based on an Os-complex-modified polypyrrole matrix and on soluble PQQ-dependent glucose dehydrogenase from Acinetobacter calcoaceticus are described. As the soluble form of glucose dehydrogenase from Acinetobacter calcoaceticus is a hydrophilic enzyme with a pos. net charge, its entrapment into the pos. charged hydrophobic polypyrrole film is much more complicated than that of the corresponding membrane enzyme or the neg. charged and very stable glucose oxidase. Possible ways for using soluble PQQ-dependent glucose dehydrogenase in combination with conducting polymer films are seen in the modulation of the enzyme properties by covalent binding of suitable compounds to the protein shell together with the adjustment of the properties of the conducting polymer film. This can be done by neutralizing the net charge of the protein and/or optimizing the electron-transfer pathway between enzyme and electrode surface by covalent binding of suitable redox relays to the protein surface. In addition, methods for increasing the hydrophilicity of the polymer film, such as the co-entrapment of high-mol. weight hydrophilic additives and copolymerization of hydrophilic pyrrole derivatives are presented. It is demonstrated that the replacement of the parent monomer pyrrole by a suitable hydrophilic pyrrole derivative facilitates the entrapment of the modified soluble PQQ-dependent glucose dehydrogenase into the Os-complex-modified polymer and hence allows for the development of reagentless biosensors. In the experiment, the researchers used many compounds, for example, (2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate (cas: 14431-43-7Related Products of 14431-43-7).

(2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate (cas: 14431-43-7) belongs to tetrahydropyran derivatives. Numerous natural products have tetrahydropyran skeleton as the building block for designing new natural products and their derivatives e.g. aplysiatoxins, avermectins, oscillatoxins, talaromycins, latrunculins and acutiphycins. The Prins reaction of homoallylic alcohols with aldehydes afforded an alternative method for the preparation of tetrahydropyrans.Related Products of 14431-43-7

Referemce:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

Thermodynamic and kinetic studies of glucose mutarotation by using a portable personal blood glucose meter was written by Perles, Carlos Eduardo;Volpe, Pedro Luiz Onofrio. And the article was included in Acta Chimica Slovenica in 2009.Safety of (2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate This article mentions the following:

A thermodn. and kinetic study of the mutarotation reaction of D-glucose in aqueous solution was carried out using a portable personal blood glucose meter. This phys. chem. experiment is proposed as an alternative to classical polarimetry. The glucose meter allows the indirect monitoring of the mutarotation process in water, by using an enzymic redox reaction. The test strips of the glucose meter contain glucose dehydrogenase which converts β-D-glucose into D-glucolactone. This reaction selectively converts glucose and generates an elec. current in the glucose meter which is proportional to the glucose concentration This experiment allows the teacher to explore the kinetics and thermodn. of the mutarotation of D-glucose and, moreover, the stereospecificity of enzymic reactions. In the experiment, the researchers used many compounds, for example, (2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate (cas: 14431-43-7Safety of (2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate).

(2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate (cas: 14431-43-7) belongs to tetrahydropyran derivatives. Tetrahydropyrans are useful synthons for biologically important compounds. The most notable anticancer agent, bryostatin, and eribulin are marine macrolides having intriguing tetrahydropyran and furan motif. Safety of (2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate

Referemce:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

Differential scanning calorimetric studies on phase transition of glucose and cellulose oligosaccharides was written by Hatakeyama, Tatsuko;Yoshida, Hiroshi;Nagasaki, Chikage;Hatakeyama, Hyoe. And the article was included in Polymer in 1976.Application of 14431-43-7 This article mentions the following:

The phase transitions of α-D-glucose anhydride and monohydrate, β-D-glucose, cellobiose, cellotriose, and cellotetraose were studied by differential scanning calorimetry and melting and glass temperatures were determined Cellotriose and cellotetraose decomposed before melting. Isothermal melting temperatures were lower than those of M. L. Wolfrom and J. C. Dacons (1952) because the effect of time on the phase transition was considered. Glass temperatures were lower than those determined by E. Alfthan et al. (1973). In the experiment, the researchers used many compounds, for example, (2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate (cas: 14431-43-7Application of 14431-43-7).

(2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate (cas: 14431-43-7) belongs to tetrahydropyran derivatives. Dihydropyrans and tetrahydropyrans are examples of cyclic ethers widespread in nature. 2-(Arylmethylene)cyclopropylcarbinols could be converted to the corresponding tetrahydropyrans stereoselectively in the presence of Brønsted acids under mild conditions. A plausible Prins-type reaction mechanism has been proposed.Application of 14431-43-7

Referemce:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

Identification of crystallized dextrose and mutual transitions between its monohydrate and anhydrate was written by Ishibashi, Hiroshi;Morio, Hiroshi;Fuchi, Katoshi;Mizuki, Katsumi. And the article was included in Kanzei Chuo Bunsekishoho in 1997.Name: (2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate This article mentions the following:

FT-IR and X-ray diffraction anal. were carried out for dextrose monohydrate and its anhydrate to distinct between its monohydrate and anhydrate. In IR spectrum, it is different from dextrose monohydrate and its anhydrate on bands at 1100 to 1050 cm^-1 and at 700 to 500 cm^-1. X-ray diffraction patterns of dextrose monohydrate and its anhydrate differ in diffraction angles and intensities. From these results, its was found that FT-IR and X-ray diffraction method was useful for distinction between dextrose monohydrate and its anhydrate. Thermogravimetric DTA (TG-DTA) was performed for crystallized dextrose. It is to be expected that dextrose monohydrate was easily transferred into its anhydrate by heating, which temperature is lower than the m.p. of its monohydrate. TG-DTA curves of dextrose anhydrate which hydrated with 9.1% moisture was similar to that of dextrose monohydrate. It is indicated that dextrose anhydrate was converted into its monohydrate with addition moisture. Dextrose anhydrate was also transformed its monohydrate at room temperature in an atm. saturated with moisture. X-ray diffraction patterns of prepared monohydrate, however, differ from com. one in diffraction intensity. It is expected that we would be able to distinct com. monohydrate from prepared monohydrate which transformed from dextrose anhydrate. In the experiment, the researchers used many compounds, for example, (2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate (cas: 14431-43-7Name: (2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate).

(2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate (cas: 14431-43-7) belongs to tetrahydropyran derivatives. Tetrahydropyran is an important raw material and intermediate used in Organic Synthesis, Pharmaceuticals, Agrochemicals and dyestuff. 2-(Arylmethylene)cyclopropylcarbinols could be converted to the corresponding tetrahydropyrans stereoselectively in the presence of Brønsted acids under mild conditions. A plausible Prins-type reaction mechanism has been proposed.Name: (2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate

Referemce:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

Determination of water in some pharmacopoeial compounds by means of refractometric method was written by Wisniewski, Wladyslaw;Szlaski, Janusz. And the article was included in Farmacja Polska in 1971.Computed Properties of C6H14O7 This article mentions the following:

Refractometric measurements of water solutions of Na2S2O3, NaBr, glucose, Na2S2O3.5H2O, NaBr.2H2O, and glucose-H2O, performed on the Abbe refractometer showed the refraction index is a linear function of the water content. A table was prepared for a quick determination of the contents of water of crystallization and hygroscopic water. In the experiment, the researchers used many compounds, for example, (2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate (cas: 14431-43-7Computed Properties of C6H14O7).

(2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate (cas: 14431-43-7) belongs to tetrahydropyran derivatives. Tetrahydropyrans and furans principally constitute as a central motif in diverse medicinally privileged molecules. One classic procedure for the organic synthesis of tetrahydropyran is by hydrogenation of the 3,4-isomer of dihydropyran with Raney nickel.Computed Properties of C6H14O7

Referemce:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

Wetting effect on optical sum frequency generation (SFG) spectra of D-glucose, D-fructose, and sucrose was written by Hieu, Hoang Chi;Li, Hongyan;Miyauchi, Yoshihiro;Mizutani, Goro;Fujita, Naoko;Nakamura, Yasunori. And the article was included in Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy in 2015.Recommanded Product: 14431-43-7 This article mentions the following:

The authors report a sum frequency generation (SFG) spectroscopy study of D-glucose, D-fructose and sucrose in the C-H stretching vibration regime. Wetting effect on the SFG spectra was studied. The SFG spectrum of D-glucose changed from that of α-D-glucose into those of α-D-glucose monohydrate by wetting. The SFG spectra showed evidence of a small change of β-D-fructopyranose into other anomers by wetting. SFG spectra of sucrose did not change by wetting. Assignments of the vibrational peaks in the SFG spectra of the 3 sugars in the dry and wet states were performed in the C-H stretching vibration region near 3000 cm^-1. In the experiment, the researchers used many compounds, for example, (2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate (cas: 14431-43-7Recommanded Product: 14431-43-7).

(2S,3R,4S,5S,6R)-6-(Hydroxymethyl)tetrahydro-2H-pyran-2,3,4,5-tetraol hydrate (cas: 14431-43-7) belongs to tetrahydropyran derivatives. Tetrahydropyran is an important raw material and intermediate used in Organic Synthesis, Pharmaceuticals, Agrochemicals and dyestuff. Pyran derivatives such as pyran flavonoids are biologically important. Monosaccharides containing six-membered rings are called pyranose.Recommanded Product: 14431-43-7

Referemce:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics

Kinetic resolution of racemic allylic alcohols via iridium-catalyzed asymmetric hydrogenation: scope, synthetic applications and insight into the origin of selectivity was written by Wu, Haibo;Margarita, Cristiana;Jongcharoenkamol, Jira;Nolan, Mark D.;Singh, Thishana;Andersson, Pher G.. And the article was included in Chemical Science in 2021.Related Products of 13417-49-7 This article mentions the following:

Herein, the first iridium catalyzed kinetic resolution of a wide range of trisubstituted secondary and tertiary allylic alcs. R¹R⁴C=CR²CH(OH)R³ [R¹ = Me, Ph, 2-thienyl, etc.; R² = H, Me, Et, etc.; R³ = Et, i-Pr, Ph, etc.; R⁴ = H, Me] was described. Large selectivity factors were observed in most cases (s up to 211), providing the unreacted starting materials in good yield with high levels of enantiopurity (ee up to >99%). The utility of this method was highlighted in the enantioselective formal synthesis of some bioactive natural products including pumiliotoxin A, inthomycin A and B. DFT studies and a selectivity model concerning the origin of selectivity were also presented. In the experiment, the researchers used many compounds, for example, 5,6-Dihydro-2H-pyran-3-carbaldehyde (cas: 13417-49-7Related Products of 13417-49-7).

5,6-Dihydro-2H-pyran-3-carbaldehyde (cas: 13417-49-7) belongs to tetrahydropyran derivatives. Dihydropyrans and tetrahydropyrans are examples of cyclic ethers widespread in nature. The bismuth chloride-assisted cross-cyclization between homoallylic alcohols and epoxides provided various benzyl tetrahydropyran derivatives. The reaction afforded good yields of desired products and occurred under mild conditions.Related Products of 13417-49-7

Referemce:
Tetrahydropyran – Wikipedia,
Tetrahydropyran – an overview | ScienceDirect Topics