title: An alternative advantageous protocol for efficient synthesis of phosphorothioate oligonucleotides utilizing phenylacetyl disulfide (PADS).
abstract: Phosphorothioate oligonucleotides could be synthesized using a 0.2 M solution of phenylacetyl disulfide (PADS) in a mixture of pyridine and acetonitrile (1:1, v/v) with > 99.9% step-wise efficiency. Unlike most other sulfurizing reagents that need to be stable in solution for performance, PADS needs to degrade and "age" in solution and hence performs efficiently even after storing the solution at room temperature for over a month. High yield and quality of oligonucleotides are produced thereby offering an alternative attractive protocol for use of this efficient sulfurizing reagent.
authors: Isis Pharmaceuticals, Inc. Carlsbad, California 92008, USA.
authors: R Krishna
authors: RK
authors: Kumar
authors: Phil
authors: P
authors: Olsen
authors: Vasulinga T
authors: VT
authors: Ravikumar
mesh_terms: D002853:Chromatography, Liquid; D013058:Mass Spectrometry; D009841:Oligonucleotides / Q000138:chemical synthesis*; D009946:Organothiophosphorus Compounds / Q000737:chemistry*; D010648:Phenylacetates / Q000737:chemistry*; D013440:Sulfides / Q000737:chemistry*
chemical_list: D009841:Oligonucleotides; D009946:Organothiophosphorus Compounds; D010648:Phenylacetates; D013440:Sulfides; C511141:phenylacetyl disulfide