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Showing 1 to 20 of 617 for “"Alcohols"”.
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Heterogeneous oxidation of alcohols
The selective oxidation of alcohols is one of the most challenging reactions in green chemistry. While the current chemical industry uses organic and inorganic oxidants to produce carbonyl compounds, it is highly desirable to use a heterogeneous catalyst for the efficient oxidation of alcohols. The …
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Synthesis and synthetic transformations of allylic alcohols, epoxy alcohols, and 1,2-cyclic sulfates
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1988.
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METABOLISM OF SEVERAL ALIPHATIC ALCOHOLS.
METABOLISM OF SEVERAL ALIPHATIC ALCOHOLS.
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Conformational Studies on Alicyclic Alcohols
… and as the basis for analysis of mixtures of alcohols.<br/><br/>This technique can therefore be used in the quantitative and qualitative study of hydrogen-bonding and conformation in alicyclic systems.
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Hydro-amination of low alcohols
… organic compounds including ethanol, and other alcohols, lactic, glutamic and citric acids, glycerol and some antibiotics; Hydroamination of low alcohols (C2-C4) over Co/Si02 catalysts yielding amines, has been selected as an option to add value to these materials. This process involves reaction …
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A new route to polyhydric alcohols
Pentaerythritol is an important industrial chemical for use in paints and coatings, primarily, but also in fuels, explosives, medicine and polymers. The current process for this material is over 50 years old and is a multi-step process involving 3 homogeneous aldolizations and a crossed Cannizzaro …
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Catalytic, Enantioselective Cyclopropanation of Allylic Alcohols
In mechanistic investigations, spectroscopic examinations and reaction surveys of substrate, reagent, and promoter were combined with solid-state evidence concerning the active form of the catalytically operative species to rationalize many of the observed features and trends of this system. …
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"The New Chemistry" - Sustainable Catalysis with Alcohols
… monoalkylation of anilines with primary alcohols was investigated. In comparative experiments the superiority of the new class of catalysts versus the original catalyst 1 was clearly shown. Under mild reaction conditions (70 °C) the selectivity profile with respect to the monoalkylation …
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Asymmetric Transfer Hydrogenation of Secondary Allylic Alcohols
… method that transforms racemic secondary allylic alcohols into optically active secondary alcohols. The key step in this methodology occurs through a ruthenium catalyzed tandem isomerization and asymmetric transfer hydrogenation reaction. This reaction is a one pot, two-step process, which …
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Oxo-metal catalysed reactions of unsaturated alcohols
… substituted salicylaldéhydes and chiral 2-aminoalcohols are also described along with a D(-)-2,3- butandiol complex of dioxomolybdeniam(VI ). As in a number of examples recently reported in the literature, epoxidation of geraniol and related compounds in the presence of these catalysts showed …
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Microwave-assisted synthesis of ß-amino alcohols
<p>ß-amino alcohols are common substructures in many biologically active compounds and can also be used as catalysts for asymmetric reactions. One common method for forming these moieties is by ring opening of unsymmetrical epoxides using amines via a substitution reaction. However, the majority of …
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The enclathration of alcohols by cholic acid
… particular Cholic acid (host) lattice structure. Alcohols in the series CH₃(CH₂nOH (n= 0 to 3 and 2-propanol) were employed as guest molecules and enclathrated in the host lattice of Cholic acid during crystallization. Single crystal structure analyses were performed by X-ray diffraction. Two …
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Alcohols and other oxygenates in automotive fuels
… an engine when blended with low-leaded gasoline. Alcohols, ethers, esters and ketones were tested individually and in various combinations up to an oxygen content of 4% wt/wt in a blend with Series F-7 gasoline of 90, 92, 94 and 96 RON. Tests were carried out at wide open throttle, constant speed …
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Borinic Acid-catalyzed Ring-opening of Epoxy Alcohols
… and rearrangement reactions of 2,3-epoxy alcohols via reversible borinate ester formation. This work focuses on expanding the mode of borinic acid catalysis to the activation of 3,4-epoxy alcohols for regioselective ring-opening reactions with various nucleophiles. The current work is …
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Brønsted acid-catalyzed alkylation of tetrazoles with alcohols
… alkyl halides under basic conditions. However, alcohols are the most convenient alkylating reagents. While Lewis and Brønsted acid-catalyzed alkylations of tetrazoles using alcohols have been reported, their drawbacks include the necessity to use excess of strong Brønsted acid, narrow scope, …
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Synthesis of Protected Amino Alcohols and Amino Aldehydes.
… synthesis are the corresponding protected amino alcohols. The amino alcohols were synthesized by borane THF reduction of Boc protected amino acids. These compounds had not been previously reported. Oxidation of the amino alcohols with pyridinium dichromate gave the amino aldehydes in high yields. …
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Copper-catalyzed enantioselective stereodivergent synthesis of amino alcohols
… for the expeditious construction of amino alcohols with high levels of chemo-, regio-, diastero- and enantioselectivity. Specifically, these amino alcohol products were synthesized using the sequential copper hydride-catalyzed hydrosilylation and hydroamination of readily available enals …
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