Purification of tertiary formamide contaminated with tertiary acetamide
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United States of America Patent
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Mar 17, 2015
Grant Date -
Jun 21, 2012
app pub date -
Jun 18, 2010
filing date -
Jun 22, 2009
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Abstract
A chlorinating agent such as a chloroiminium species is used to remove or neutralize tertiary acetamide present as a contaminant in a tertiary formamide solvent. Tertiary formamide solvent purified or treated in this manner can be used as a reaction vehicle for the chlorination of sucrose-6-acylates, thereby improving the yields of the desired sucralose-6-acylate (an intermediate in the production of sucralose).
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