Past and Present Research Systems of Green Chemistry

Biography

Biography: Soon H. Hong

Abstract

Development of useful, practical, and selective synthetic methods that generate minimal by-product is of critical importance in both academic and industrial research. The research of our group seeks to develop practical and environmentally friendly synthetic methodology using transition metal catalysts. Specifically, we have explored novel C–N formation reactions from primary alcohols and various N-sources, chemical synthesis using CO2 and methanol as C1 sources, and development of organometallic catalysts based on N-heterocyclic carbene ligands. Direct C–N formation reactions from alcohols and N-containing molecules is a highly atom economical transformation producing hydrogen as the sole byproduct. Well-defined N-heterocyclic carbene based Ru complexes were developed as highly active pre catalysts based on the mechanistic insight suggesting a Ru hydride species as an active catalytic intermediate. With the developed catalysts, various novel C–N formation reactions for the synthesis of amides, imides, ureas, and amines were achieved. The developed catalytic systems involving hydrogen transfer have been also applied to CO2 reduction and methanol activation. With these sustainable C1 sources, reactions developments are actively ongoing in our group. Lastly, our recent researches on homogeneous catalyst development based on N-heterocyclic carbene and pincer ligands will be presented.