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I obtain 2,3,3-trimethylbenzoindole through Fischer indole synthesis (88% purity). I cannot find a way to purify this intermediate, and I need a min. 99% for using into the next step for dyes...
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I am trying to obtain 2-naphthyl hydrazine*HCl starting from 2-naphthol and hydrazine hydrate 80%, followed by treatment with HCl 37%. Is there a trick here that I can use to convert the whole qty...
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