PROCESS FOR THE PURIFICATION OF INDOLE CARBAZOLE ALKALOIDS
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United States of America Patent
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Issued Date -
Apr 27, 2023
app pub date -
Mar 1, 2021
filing date -
Mar 2, 2020
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Disclosed is a process for the purification of staurosporine (1), which comprises salification of staurosporine (1) (Formula (1)) by treatment with a mineral acid to give a precipitated salt, isolation of the staurosporine (1) precipitated salt, treatment of the staurosporine (1) isolated salt with an organic base, and isolation of staurosporine (1). Also disclosed are novel polymorphic forms of the mono- and bis-hydrochloride salts of staurosporine (1).
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