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Preparation of Succinimidyl and Pentafluorophenyl Active Esters of 5- and 6- Carboxyfluorescein
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文摘
A mixture of 5- and 6-carboxyfluorescein was activated with1-[3-(dimethylamino)propyl]-3-ethylcarbodiimide hydrochloride in the presence of eitherN-hydroxysuccinimide or pentafluorophenol togivethe corresponding succinimidyl and pentafluorophenyl esters. Theregioisomeric mixtures wereseparated to give the 5- and 6- succinimidyl and pentafluorophenylactive esters in >98% purity.

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