Method for preparing crystalline 3-0-alkyl-ascorbic acid
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United States of America Patent
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Nov 23, 2010
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Dec 7, 2006
filing date -
Oct 12, 2006
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Abstract
The present invention relates to a method for preparing 3-O-substituted ascorbic acid derivatives represented by formula 1, in which 5,6-O-isopropylidene ascorbic acid is reacted with a halide in an organic solvent in the presence of the anion exchange resin absorbed with multi-iodine anions and then deprotected. The method of the present invention has an advantage of providing a target compound with high purity and high yield by finishing the reaction within a short period of time at room temperature.
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