Activators for oligonucleotide synthesis

Details Activators for oligonucleotide synthesis Activators for oligonucleotide synthesis

2005-01-25

2005-01-25

Lewis, Patrick T (Department: 1623)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

C536S025300, C536S025600

Reexamination Certificate

active

06846922

ABSTRACT:
The present invention relates to improved methods for the preparation of nucleoside phosphoramidites and oligonucleotides. In one aspect, the methods of the invention are used to prepare phosphitylating reagents using pyridinium salts as activators. In a further aspect, the methods of the invention are used to prepare internucleoside linkages using activators which include at least one pyridinium salt and at least one substituted imidazole. In a further aspect, methods are provided preparation of internucleoside linkages between nucleosides having 2′-substituents using imidazolium or benzimidazolium salts as an activator. In a further aspect, methods are provided preparation of internucleoside linkages between nucleosides having bioreversible protecting group that confers enhanced chemical and biophysical properties, without exocyclic amine protection, using imidazolium or benzimidazolium salts as an activator.

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