University of South FloridaTitle
Research Interests

 

Research Interests
Group Members
Photo Album
Course Information
Chemistry Links

Main page

 

 

 

 

 

 

 

Presently our laboratories focus on

Efficient and environmentally friendly synthetic routes towards synthesis of polymers for biodegradable applications

Stereo controlled synthesis/modification of molecules that serve as precursors to biologically active molecule, i.e., unnatural amino acids, sugars, etc.

Regio and  stereo-selective synthesis of multi-arm dendrimers by chemo/enzymatic routes.

Enzymatic synthesis of well defined polymers: In-vitro enzyme-catalyzed reactions provide opportunities for high levels of structural control. Therefore the   opportunities exist for the synthesis of novel polymers and for creation of new interesting structures using in-vitro enzyme-catalyzed reactions. A guiding principle of this research is to view enzymes as a diverse family of important catalyst systems that, thus far, has received insufficient attention for use in polymer synthesis and modification. We have been investigating enzyme-catalyzed ring-opening reactions to prepare important new and well-defined functional polymers and contribute new synthetic routes. Synthesis of interesting and diversified group of new multi-arm heteroblock copolymers is currently being pursued. These multi-arm heteroblock copolymers will be useful as interfacial agents in polymeric blends, to bind both hydrophilic and hydrophobic molecules and for applications in drug delivery systems.


Scheme1. Synthesis of random Poly[MBC-co-TMC] by Lipase AK Catalyzed 

Scheme 2.  First example of a polycarbonate having free carboxylic acid groups

Regio- and Stereo-controlled Synthesis/Modifications: Chemical and enzymatic methods are being developed for imparting unprecedented selectivity. Some of the structures shown below have been successfully synthesized/modified following this approach.


Scheme 3. Enantioselective acylation by lipase PS.

Design and Synthesis of potent Antitumor Agents: We have an strong interest in design and synthesis of novel anti cancer agents. A collaborative effort has been established with the Drug Discovery program of the H. Lee Moffitt Cancer and Research Institute at USF.  The compounds of interests include analogs of Nucleotides and Nucleosides , Unnatural amino acids, Oligosaccharides and Nitrogen Heterocycles.   

Scheme 4.  General structures of interest as synthetic targets