Results 161 to 170 of about 3,257 (193)
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Terbium(III) complexes of (−)-quinic acid
Journal of the Less Common Metals, 1983Abstract Complexation between terbium(III) and (−)-quinic acid (quin) (1,2,3,5-tetrahydroxycyclohexanecarboxylic acid) was studied by means of circularly polarized luminescence spectroscopy. [Tb]:[quin] ratios of 1:1, 1:2, 1:3, 1:5 and 1:10 were studied, and measurements of intermolecular energy transfer were used to determine pH regions in which the
Harry G. Brittain +3 more
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A synthesis of
Here, we report an efficient synthesis of l-(+)-quinic acid from the natural product d-(–)-quinic acid in a 12-step sequence. The key steps involve the kinetic controlled selective protection of a lactone intermediate and the inversion of two stereocentres: the C-3 and C-5 hydroxyl of the quinic acid core using optimized oxidation–reduction conditions.
Johnny Nguyen +2 more
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Occurrence of shikimic and quinic acids in angiosperms
Phytochemistry, 1975Abstract Leaves of 83 angiosperms have been made surveyed for quinic and shikimic acids. The quinic acid content was higher in woody dicotyledons than in herbaceous dicotyledons or in the monocotyledons, substantiating the view that its presence may be correlated with the lignification in plants.
Seiichi Yoshida +2 more
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An efficient transformation of quinic acid to shikimic acid derivatives
Tetrahedron, 1999Abstract The synthesis of (−)-methyl shikimate and (−)-methyl 3- epi -shikimate and the 3-aminoshikimate derivative have been achieved via short and efficient routes from quinic acid.
Cristina Alves +3 more
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Chlorogenic and quinic acids in sunflower meal
Journal of the Science of Food and Agriculture, 1968AbstractChlorogenic and quinic acids were isolated from the kernel of sunflower seed by column chromatography and identified by paper chromatography. Ultra‐violet and infra‐red spectra of the above acids were compared with those of pure preparations. The contents of both acids in the kernel and hull of sunflower seeds were determined and the conversion
B. Milić +3 more
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Polycarbonates from the Polyhydroxy Natural Product Quinic Acid
Biomacromolecules, 2011Strategies for the preparation of polycarbonates, derived from natural polyhydroxy monomeric repeat units, were developed for biosourced polycarbonates based on quinic acid. The design and synthesis of regioselectively tert-butyldimethylsilyloxy (TBS)-protected 1,4- and 1,5-diol monomers of quinic acid were followed by optimization of their ...
Céline J, Besset +3 more
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REPLACEMENT REACTIONS IN THE QUINIC ACID SERIES
Canadian Journal of Chemistry, 1963The action on D-quinic acid of hot 95% acetic acid containing mineral acid gave, after complete acetylation, 1,4,5-tri-O-acetyl-epi-quinide consisting of approximately equal portions of the (−)- and (±)-isomers, and tetra-O-acetyl-scyllo-quinic acid. The stereochemistry of the products and their derived free polyols were determined by nuclear magnetic
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Occurrence of quinic acid in the ferns
The Botanical Magazine Tokyo, 1972Takao Minamikawa, Seiichi Yoshida
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Shikimic acid and quinic acid are not mutagenic in the Ames assay.
Lloydia, 1979Shikimic acid, reported to cause tumors in mice, and its close structural analog, quinic acid, both ubiquitous constituents of higher plants, were found not be be mutagenic in the Ames assay when tested with and without the rat liver microsomal activation system.
L B, Jacobsen +2 more
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QUINIC ACID COMPOSITION IN ACTINIDIA
Acta Horticulturae, 2007K.B. Marsh, H.L. Boldingh, C.H. Cheng
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