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Showing 1 to 9 of 9 for “"acid-catalyzed reaction"”.
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Brønsted acid-catalyzed reaction of alkynyltrifluoroborates with acetals and ketals
… in synthetic organic chemistry. Brønsted acid catalysis is a powerful synthetic tool to make many different compounds, however, the current carbon-based nucleophiles are the major limitation of acid-catalyzed reactions. In effort to expand repertoire of Brønsted acid compatible …
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Borox catalysis : a new frontier in chiral Bronsted acid catalysis derived from chiral borate anions
… on the development of the new chiral Brønsted acid catalysts, large-scale synthesis, novel reaction methodologies and understanding their mechanisms by experimental/computational analysis. In due course of time, a pool of unprecedented chiral Brønsted acid catalysts known to be "BOROX" …
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Synthesis and Chemiluminescent Investigation of Malonyl Peroxides
… (5) are prepared by the methanesulfonic acid catalyzed reaction of hydrogen peroxide with the parent malonic acids. Weak chemiluminescence is observed from all three peroxides when they are thermolyzed in the presence of an aromatic fluorescer. The CIEEL mechanism is applied to explain …
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On the Stereochemistry of Allylmetal-Aldehyde Condensations (Allyltrimethylsilane, Allyltributylstannane, Homoallylic Alcohols)
… of double bonds was observed with the Lewis acid catalyzed reaction of 3a. The selectivity for 4 was dependent on Lewis acid. Cyclization induced by fluoride ion resulted in a stereochemical reversal. The Lewis acid and heat induced cyclization of 3b gave a large preference for the syn isomer …
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Brønsted Acid-Catalyzed Reactions of Vinylboronic Acids and Benzhydryl Alcohols
… towards functionalization rely on harsh reaction conditions or the use of Lewis acid catalysts, which leads to low functional group tolerance. Herein, a methodology for the formation of 1,3,3-triphenylpropene derivatives through a Brønsted acid-catalyzed reaction of styrylboronic acids …
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A study of the electronic effects of various substituents on the course of an aromatic cyclodehydration reaction vs. a Elbs-type reaction
The acld-oata17zed oyclodehydrat1on reaction of 2-benzylphenyl l-naphthyl ketone gives two products! 9-(1-naphthyl)anthracene, the expected product and in addition lO-phenyl-l,2-benzanthracene. This second product is the one expected it the ketone were subjected to the conditions of an .Elba …
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Evaluation of Surface Acetylated Bacterial Cellulose for Antibacterial Wound Dressing Applications
… acetyl groups using acetic anhydride in a citric acid-catalyzed reaction. The resulting ester linkages between the acetyl groups and bacterial cellulose surface were hypothesized to be cleaved by bacterial esterases or other hydrolytic enzymes such that acetic acid, a well-known antibacterial …
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Identification and characterization of potent odorants responsible for typical and storage-induced flavors of cola-flavored carbonated beverages
… these flavorings, however, are not stable under acidic conditions due to acid-catalyzed reactions. Degradation of typical potent odorants and formation of storage-induced odorants by these reactions leading to flavor changes in cola-flavored carbonated beverages were evaluated in the present …
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Promotion of Heterogeneous Acid and Base Catalysts for Biomass Upgrading
… source for chemicals production. Homogeneous acids and bases have been shown to be active for a wide variety of chemical reactions useful in converting bio-based substrates to existing and novel chemicals; however, the costly separations associated with homogeneous catalysts have necessitated …