WARF: P02304US

Chemical Synthesis of Reagents for Peptide Coupling


Ronald Raines, Laura Kiessling, Bradley Nilsson, Matthew Soellner, Yi He, Ronald Hinklin

The Wisconsin Alumni Research Foundation (WARF) is seeking commercial partners interested in developing improved methods for synthesizing phosphinothiol reagents.
OVERVIEWThe Staudinger ligation method for synthesizing peptides requires phosphinothiol reagents that are not commercially available. The current method for making phosphinothiols is complicated (involving four steps) and time-consuming, uses dangerous chemicals, may result in tar-like products, is difficult to effect on a large scale and produces an overall yield of only 39 percent.
THE INVENTIONUW-Madison researchers have developed improved methods for synthesizing phosphinothiol reagents. These synthesis techniques take advantage of phosphorus’s strong interaction with boron, and are based on an easily prepared alkylating agent and a commercially available borane-organophosphine complex. In the methods, the alkylating agent is reacted with the borane-organophosphine complex. Disrupting the resulting phosphine-borane complex and removing the protecting group generates the phosphinothiol reagents.
  • Phosphinothiol production
  • Requires one less step than the current method
  • Provides an overall yield of 74 percent
  • Can be used to create a limitless variety of phosphinothiols
  • Intermediary phosphine-borane complex is stable to air and moisture, allowing storage at room temperature for several months.
For More Information About the Inventors
Contact Information
For current licensing status, please contact Jennifer Gottwald at or 608-960-9854.
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