Johannes Gerardus Vries De

Title: Inventor Spotlight: Johannes Gerardus Vries De from Maastricht, NL

Introduction

Johannes Gerardus Vries De is an inventive mind hailing from Maastricht, NL. With a total of three patents to his name, he has made significant contributions to the field of asymmetric hydrogenation and catalyst regeneration. His innovative work showcases the intersection of chemistry and technology, driving advancements in numerous applications.

Latest Patents

Vries De’s latest patents reveal his expertise in catalytic processes. One of his notable inventions is a catalyst for asymmetric (transfer) hydrogenation represented by the formula MLXS. In this formula, M is a transition metal, such as rhodium or ruthenium, while X represents a counter ion, and S denotes a ligand. The parameters a, b, and c define the relationship of the components, enhancing the effectiveness of the catalyst in various reactions. Additionally, he has developed a process for the asymmetric (transfer) hydrogenation of olefinically unsaturated compounds, ketones, imines, or oxime derivatives using this robust catalyst.

Another important patent involves a process for regenerating palladium (Pd) catalysts after a homogeneously catalyzed carbon-carbon (C—C) coupling reaction. This innovation allows the Pd catalyst to be precipitated, separated from the reaction mixture, and subsequently treated with iodine or bromine, making it reusable for future reactions. This process may be applied in several coupling reactions, such as the Heck reaction, Suzuki reaction, or cross-coupling reaction.

Career Highlights

Johannes Vries De has contributed his talents to prominent companies, including DSM IP Assets B.V. and DSM N.V. His role in these organizations has been instrumental in advancing research and development within the field of catalysis.

Collaborations

Throughout his career, Vries De has had the opportunity to work alongside esteemed colleagues, including Michel Berg Van Den and Ben Feringa. These collaborations have fostered an environment of innovation and creativity, enabling the advancement of groundbreaking technologies.

Conclusion

Johannes Gerardus Vries De is a remarkable inventor whose work in asymmetric hydrogenation and catalyst regeneration has made a significant impact in the world of chemistry. His patents not only reflect his ingenuity but also contribute to the broader scientific community, paving the way for new technologies and advancements in the field.