| 1. | Nucleoside phosphoramidites are purified by column chromatography on silica gel.
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| 2. | Purification typically involves extensive column chromatography, extraction to name a few techniques.
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| 3. | With a bit of skill, Pasteur pipettes may also be used for microscale column chromatography.
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| 4. | With appropriately fine silica gel, the bulb may be squeezed for microscale flash column chromatography.
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| 5. | The products are usually extracted and purified by phenol-methylene chloride extraction or by column chromatography.
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| 6. | Hydrolysis of the chlorides yield the corresponding alcohols, which are separable by column chromatography over alumina.
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| 7. | In fact, the diastereomeric forms of DTHFP have been separated by column chromatography over silica gel.
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| 8. | The particle size of the stationary phase is generally finer in flash column chromatography than in gravity column chromatography.
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| 9. | The particle size of the stationary phase is generally finer in flash column chromatography than in gravity column chromatography.
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| 10. | The final product "'3 "'was isolated by column chromatography at " 30 �C.
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