Alternative acetylation process in the synthesis of non-ionic X-ray contrast agents
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United States of America Patent
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Jun 27, 2017
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Oct 20, 2016
app pub date -
Dec 8, 2014
filing date -
Dec 6, 2013
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Abstract
An alternative acetylation process for the synthesis of 5-acetamido-N,N′-bis(2,3-dihydroxypropyl)-2,4,6-triiodoisophthalamide (“Compound A”), an intermediate in the industrial preparation of non-ionic X-ray contrast agents, is described. The process can be performed on an industrial scale to produce Compound A with improved purity and improved yields compared to the established processes.
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