Publication: An expedient method for kinetically controlled acetonide formation from d-fructose induced by ionic liquid catalyst accompanied with sr cl 2 .6h 2 O
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Date
2020-03-16
Authors
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Yıldırım, Ayhan
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Springer
Abstract
The present work was undertaken to ascertain whether IL-metal salt catalyzed isopropylidenation of d-fructose yield desired acetonides. For the first time, an imidazole based ionic liquid compound accompanied with strontium chloride has been identified as a suitable dual catalyst system for the chemoselective O-isopropylidenation of d-fructose with acetone. In the present protocol, mainly the kinetically controlled less stable cyclic ketal 1,2;4,5-di-O-isopropylidene-beta-d-fructopyranose is formed as an initial product with satisfactory yield and without isomerization to the thermodynamically more stable cyclic ketal 2,3;4,5-di-O-isopropylidene-beta-d-fructopyranose. Therefore, this protocol is more advantageous compared to other mineral acid catalyzed protocols that require more sensitive reaction conditions.
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Keywords
O-isopropylidenation, Chiral auxiliary, Acetonation, Sugar, Acid, Derivatives, Acetals, Iodine, D-fructose, O-isopropylidenation, Ionic liquid, Chemoselective, Acetonation, Science & technology, Physical sciences, Chemistry, physical, Chemistry
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