Process for the preparation of sucrose 6-esters
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United States of America Patent
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Aug 8, 1995
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app pub date -
May 21, 1992
filing date -
May 21, 1991
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Abstract
A method for the preparation of a sucrose 6-ester comprises: (i) reacting sucrose with a ketene acetal in the presence of an acid catalyst in an inert organic solvent to form a sucrose alkyl 4, 6-orthoester; (ii) subjecting the sucrose alkyl 4, 6-orthoester to mild acidic hydrolysis to provide a mixture of 4- and 6-monoesters of sucrose; and (iii) treating the mixture of sucrose monoesters with a base to convert the sucrose 4-ester into sucrose 6-ester. Sucralose may be prepared by chlorination of sucrose 6-esters prepared according to the invention.
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