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| | Presently our laboratories focus on
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Efficient and environmentally friendly synthetic routes
towards synthesis of polymers for biodegradable applications |
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Stereo controlled synthesis/modification of molecules that
serve as precursors to biologically active molecule, i.e., unnatural amino
acids, sugars, etc. |
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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.
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Scheme1. Synthesis of random
Poly[MBC-co-TMC] by Lipase AK Catalyzed
Scheme 2. First example of a
polycarbonate having free carboxylic acid groups
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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.
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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.
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Scheme 4. General structures of
interest as synthetic targets
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