#  Merck-Banyu Lecture - Dr. Kohsuke Ohmatsu & Dr. Koji Hirano 

 



####  calendar\_today Date and Time 

 **October 21, 2022** 

 02:00PM - 03:00PM EDT 

####  pin\_drop Location 

 **Pfizer Lecture Hall**  



 

 



 

 Dr. Kohsuke Ohmatsu

 Associate Professor, Institute of Transformative Bio-Molecules,

 Nagoya University

 Exploiting Ionic Molecules for Hitherto Difficult Catalytic Transformation.

 Dr.Ohmatsu has developed novel ionic ligands and ionic organ catalysts:

 1)ion-pairedligandconsistingofcationicachiralphosphineandchiralanion; 2)chiral onium−phosphine hybrid ligand and; 3)chiral1,2,3-triazoliumionhavingstronganion-bindingability.

 These catalysts enabled challenging asymmetric transformations such as construction of contiguous all-carbon quaternary stereocenters. He also developed a unique ionic radical catalyst: 4)zwitterionic triazolium amidate that allowed for efficient C(sp3)−H alkylation of various organic compounds.

 **Dr. Koji Hirano**

 Associate Professor, Department of Applied Chemistry, Graduate School of Engineering, Osaka University

 **Development of New Bond Forming Strategies by Extended Umpolung**

 Dr.Hirano has extended the concept of traditional carbonyl umpolung to aromatic compounds as well as heteroatom species and developed new C–C and C–heteroatom bond forming strategies: 1)direct aromatic couplings via Cu-mediated C–H activation; 2)highly regio-and enantioselective aminoboration and hydroamination of alkenes via Cu-mediated electrophilic amination; 3)C–C/C–Pbond forming sequence and rapid construction of phospholes via Tf2O-mediated electrophilic phosphination. These studies enable the otherwise challenging molecular transformation sand greatly contribute to the development of organic synthetic chemistry.



 



 

 



 

 

 Share on:- [     Facebook ](#)
- [     Twitter ](#)
- [     Linkedin ](#)
 


 Save: [ Add to calendar calendar\_today ](https://www.chemistry.harvard.edu/node/1433095/event-feed.ics)  Copy link link