SR Innovations India

Sulfur transfer reagents are crucial for synthesizing oligonucleotide phosphorothioates, a type of oligonucleotide with a sulfur atom replacing a non-sulfur atom in the phosphate backbone, making it more stable.

Some commonly used reagents include PADS (Phenylacetyl Disulfide),

Beaucage reagent (H-1,2-benzodithiol-3-one-1,1-dioxide), Xanthane hydride, and TETD (Tetraethylthiuram Disulfide).

These reagents are typically used with the phosphoramidite method of oligonucleotide synthesis. Here's a more detailed look at some of the key sulfur transfer reagents:
PADS (Phenylacetyl Disulfide): A widely used reagent, PADS requires pyridine as a solvent and has an unpleasant odor. Beaucage reagent (H-1,2-benzodithiol-3-one-1,1-dioxide): Another popular choice, but its synthesis and stability aren't optimal, and it can generate oxidizing byproducts. Xanthane hydride: A reagent that avoids the production of oxidants, carbon disulfide, and cyanamide as byproducts. TETD (Tetraethylthiuram Disulfide): Another effective reagent, though it can also generate byproducts. DDTT (3-((Dimethylamino-methylidene)amino)-3H-1,2,4-dithiazole-3-thione): A reagent that exhibits stability and strong sulfurizing ability, making it a good alternative to Beaucage reagent. EDITH (3-ethoxy-1,2,4-dithiazoline-5-one): An efficient reagent that has been used in the synthesis of oligonucleotides. BTTM (Benzyltriethylammonium Tetrathiomolybdate): Another reported reagent. S-Tetra (Bis-(O,O-diisopropoxyphosphinothioyl) disulfide): A reagent that has been used in oligonucleotide synthesis.