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Published on: April 9, 2018
Dimethylthiarum disulfide: new sulfur transfer reagent in phosphorothioates oligonucleotide synthesis
Zhiwei Wang1, Quanlai Song, Yogesh S Sanghvi
1Medicinal Chemistry Department, ISIS Pharmaceuticals, Carlsbad, CA, USA.
Abstract:
Dimethylthiarum disulfide (DTD) has been developed as a new and efficient sulfur-transfer reagent for automated synthesis of phosphorothioate oligonucleotides using phosphoramidite chemistry. The traditional four-step automated oligonucleotide synthesis has been compressed to three-step protocol using DTD. This improvement allowed an overall 20% reduction in the solvent consumption and reduced the total synthesis time by 25%. The large-scale application of DTD has been successfully demonstrated by synthesis of therapeutically useful 20-mer phosphorothioate antisense oligonucleotides with excellent yield and purity.
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