Chloral-free DCA in oligonucleotide synthesis

Organic compounds -- part of the class 532-570 series – Organic compounds – Carbohydrates or derivatives

Reexamination Certificate

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C536S025330, C536S025340

Reexamination Certificate

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10403692

ABSTRACT:
A process of manufacturing oligonucleotides includes a 5′-deblocking step in which the 5-blocking group is removed with dichloroacetic acid that is essentially free of chloral. The process is useful for making oligonucleotides that are substantially free of chloral adducts.

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