Stephen E Ammann

Title: The Innovative Contributions of Stephen E Ammann

Introduction

Stephen E Ammann is a notable inventor based in Champaign, IL (US). He has made significant contributions to the field of chemistry, particularly in the area of metal-catalyzed oxidation of olefins. His work has implications for the synthesis of complex organic molecules, showcasing his expertise and innovative approach.

Latest Patents

Stephen E Ammann holds a patent for "Sulfoxide ligand metal catalyzed oxidation of olefins." This patent details the enantioselective synthesis of isochroman motifs accomplished via Pd(II)-catalyzed allylic C—H oxidation from terminal olefin precursors. A key aspect of this invention is the development of a novel chiral aryl sulfoxide-oxazoline (ArSOX) ligand. The reaction demonstrates broad scope and high levels of asymmetric induction, achieving an average of 92% enantiomeric excess across 13 examples with ≥90% enantiomeric excess. Furthermore, the patent discloses a C(sp)-N fragment coupling reaction between terminal olefins and N-triflyl protected aliphatic and aromatic amines, yielding a range of 52 allylic amines with good yields and excellent regio- and stereoselectivity.

Career Highlights

Stephen E Ammann is affiliated with the University of Illinois, where he continues to advance research in organic chemistry. His innovative work has garnered attention in the scientific community, contributing to the understanding of C—H activation and amination reactions.

Collaborations

Stephen has collaborated with esteemed colleagues, including M Christina White and Wei Liu, further enhancing the impact of his research through teamwork and shared expertise.

Conclusion

Stephen E Ammann's contributions to the field of chemistry, particularly through his patent on sulfoxide ligand metal-catalyzed oxidation, highlight his innovative spirit and dedication to advancing scientific knowledge. His work not only showcases his individual talent but also emphasizes the importance of collaboration in achieving groundbreaking results.