Reactions of phenyl salicylates with cyclodextrin in alkaline solution.
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چکیده
منابع مشابه
Deprotonation of beta-cyclodextrin in alkaline solutions.
Variable pH (13)C NMR and (1)H NMR spectroscopic studies of the beta-cyclodextrin (beta-CD) in alkaline aqueous solutions revealed that beta-CD does not deprotonate at pH<12.0. Further increase in solution pH results in the deprotonation of OH-groups adjacent to C-2 and C-3 carbon atoms of beta-CD glucopyranose units, whereas the deprotonation of OH-groups adjacent to C-6 carbon atoms is expres...
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A proton NMR method for the determination of the solvation numbers of alkaline earth cations with dimethylsulfoxide (DMSO) in nitromethane as diluent is described. The method is based on the monitoring of the resonance frequency of DMSO protons as a function of DMSO to metal ion mole ratio while keeping the metal ion concentration constant. The average solvation number of cations at any...
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Displacements on benzenediazonium cation, C,jHsNz+, in solution in the absence of strong bases, reducing agents, or light proceed by rate-determining cleavage to a singlet phenyl cation intermediate, CsH5+, rather than by the bimolecular mechanism proposed in 1969. In aqueous solution at 2 5 O , only unrearranged products are obtained, and negligible incorporation of deuterium from solvent D2O ...
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a Plant Polymer Research Unit, National Center for Agricultural Utilization Research, USDA/Agricultural Research Services, 1815 N. University Street, Peoria, IL 61604, USA Ashland Hercules Water Technologies, 500 Hercules Road, Wilmington, DE 19808-1599, USA Mycotoxin Research Unit, National Center for Agricultural Utilization Research, USDA/Agricultural Research Services, 1815 N. University St...
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ژورنال
عنوان ژورنال: Chemical and Pharmaceutical Bulletin
سال: 1979
ISSN: 0009-2363,1347-5223
DOI: 10.1248/cpb.27.963