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4. The solvent and volatiles were completely removed under vacuum to give the crude product. The compounds were purified by column chromatography over silica gel
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4. The solvent and volatiles were completely removed under vacuum to give the crude product. The compounds were purified by column chromatography over silica gel.
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4 in DCM. Products 12-14 were recrystallized from water
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4 and the volatile components were removed under vacuum. The recovered ionic liquid was reused in subsequent reactions
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