Synthesis of RNA using 2'-O-DTM protection

Area of Science:

• Organic Chemistry
• Biochemistry
• Molecular Biology

Background:

• Solid-phase RNA synthesis is crucial for producing RNA oligonucleotides.
• Protecting groups are essential for managing reactive hydroxyl groups during synthesis.
• Existing methods for 2'-OH protection in RNA synthesis have limitations.

Purpose of the Study:

• To develop a novel hydroxyl protecting group for 2'-OH protection during solid-phase RNA synthesis.
• To evaluate the compatibility and efficiency of the new protecting group with standard oligonucleotide synthesis protocols.
• To establish mild and effective deprotection conditions for the new protecting group.

Main Methods:

• Development of the tert-Butyldithiomethyl (DTM) protecting group.
• Application of DTM for 2'-OH protection in solid-phase RNA synthesis.
• Compatibility studies with standard oligonucleotide protecting groups.
• Assessment of deprotection conditions and RNA purification.

Main Results:

• The novel tert-Butyldithiomethyl (DTM) protecting group was successfully synthesized and applied.
• DTM demonstrated compatibility with standard protecting groups used in oligonucleotide synthesis.
• RNA synthesis using DTM protection resulted in fast and high yields.
• Oligonucleotides with 2'-O-DTM groups were deprotected under mild, aqueous, homogeneous conditions.
• The 5'-O-DMTr group remained intact, enabling high-throughput cartridge purification.

Conclusions:

• The tert-Butyldithiomethyl (DTM) group is an effective hydroxyl protecting group for 2'-OH in solid-phase RNA synthesis.
• DTM protection allows for efficient RNA synthesis and mild deprotection conditions.
• This method supports high-throughput RNA purification, advancing oligonucleotide synthesis capabilities.