Method of synthesis of substituted hexitols such as dianhydrogalactitol
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United States of America Patent
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Oct 22, 2013
Grant Date -
Aug 15, 2013
app pub date -
Aug 17, 2011
filing date -
Aug 18, 2010
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Abstract
The present invention provides an efficient method of synthesizing and purifying dianhydrohexitols such as dianhydrogalactitol. In general, as applied to dianhydrogalactitol, the method comprises: (1) reacting dulcitol with a concentrated solution of hydrobromic acid at a temperature of about 80° C. to produce dibromogalactitol; (2) reacting the dibromogalactitol with potassium carbonate in t-butanol to produce dianhydrogalactitol; and (3) purifying the dianhydrogalactitol using a slurry of ethyl ether to produce purified dianhydrogalactitol.
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