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Synthesis and photostability of methoxycinnamic acid modified cyclodextrins

Paper ID Volume ID Publish Year Pages File Format Full-Text
27928 44050 2010 6 PDF Available
Title
Synthesis and photostability of methoxycinnamic acid modified cyclodextrins
Abstract

Various cyclodextrins, alpha, beta and gamma, were esterified with 4-methoxy-, 2,4,5- and 2,4,6-trimethoxycinnamic acids. Upon esterification with β-cyclodextrin, the photostability of 2,4,5-trimethoxycinnamate increased while no improvement was observed for 4-methoxycinnamate and 2,4,6-trimethoxycinnamate. However, increase in the photostability of 4-methoxycinnamoyl moiety could be observed when esterified with α-CD and that of 2,4,6-trimethoxycinnamoyl moiety could be observed after being esterified with γ-CD. These photostability data together with the 2D NMR analyses indicated that the 4-methoxycinnamoyl, 2,4,5-trimethoxycinnamoyl and 2,4,6-trimethoxy cinnamoyl moieties could enter the α-CD, the β-CD, and the γ-CD cavities, respectively.

Keywords
Cinnamic acids; Cyclodextrins; UV-filters; Photoisomerization
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Synthesis and photostability of methoxycinnamic acid modified cyclodextrins
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 212, Issue 1, 30 April 2010, Pages 56–61
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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