) Our principle goal during the tenure of this grant will be the development of new catalyzed organic reactions for the stereospecific assemblage of C-C bond with broad, applications to the synthesis of a variety of target compounds possessing pharmacological activity. The reaction technology under development is specifically designed to address fundamental C-C bond forming reactions that are generally applicable to complex molecule synthesis and the preparation of important chemical building blocks in the context of industrial or medicinal chemistry synthesis activities. Catalyzed asymmetric acyl chloride-aldehyde cyclocondensations developed in our laboratories are further developed as versatile reaction technology for asymmetric organic synthesis. This methodology will be refined and developed in the context of the total synthesis of naturally occurring materials that express potent anticancer and antiviral activities, including amphidinolide B, rhazinilam, and motuporin. Moreover, a family of unique optically active Al(III)-based Lewis acids will be developed as bifunctional Lewis acidic-Lewis basic catalysts with applications to a variety of asymmetric C-C bond constructions. An economical and operationally simple synthesis of highly enantiomerically enriched beta-amino acids is also exploited in an efficient approach to the synthesis of beta-peptides and the preparation of cyclic beta-peptide structures designed to function as integrin receptor antagonists.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Research Project (R01)
Project #
5R01GM063151-04
Application #
6794664
Study Section
Medicinal Chemistry Study Section (MCHA)
Program Officer
Schwab, John M
Project Start
2001-09-01
Project End
2005-08-31
Budget Start
2004-09-01
Budget End
2005-08-31
Support Year
4
Fiscal Year
2004
Total Cost
$186,455
Indirect Cost
Name
University of Pittsburgh
Department
Chemistry
Type
Schools of Arts and Sciences
DUNS #
004514360
City
Pittsburgh
State
PA
Country
United States
Zip Code
15213
Vargo, Thomas R; Hale, James S; Nelson, Scott G (2010) Catalytic asymmetric aldol equivalents in the enantioselective synthesis of the apoptolidin C aglycone. Angew Chem Int Ed Engl 49:8678-81
Chandra, Binita; Fu, Dezhi; Nelson, Scott G (2010) Catalytic asymmetric synthesis of complex polypropionates: Lewis base catalyzed aldol equivalents in the synthesis of erythronolide B. Angew Chem Int Ed Engl 49:2591-4
Vogt, Andreas; McPherson, Peter A; Shen, Xiaoqiang et al. (2009) High-content analysis of cancer-cell-specific apoptosis and inhibition of in vivo angiogenesis by synthetic (-)-pironetin and analogs. Chem Biol Drug Des 74:358-68
Sarkar, Nihar; Banerjee, Abhisek; Nelson, Scott G (2008) [4 + 2] cycloadditions of N-alkenyl iminium ions: structurally complex heterocycles from a three-component Diels-Alder reaction sequence. J Am Chem Soc 130:9222-3
Liu, Zuosheng; Wasmuth, Andrew S; Nelson, Scott G (2006) Au(I)-catalyzed annulation of enantioenriched allenes in the enantioselective total synthesis of (-)-rhazinilam. J Am Chem Soc 128:10352-3
Gopalarathnam, Apsara; Nelson, Scott G (2006) Amphidinolide B: asymmetric synthesis of a C7-C20 synthon. Org Lett 8:7-10
Shen, Xiaoqiang; Wasmuth, Andrew S; Zhao, Junping et al. (2006) Catalytic asymmetric assembly of stereodefined propionate units: an enantioselective total synthesis of (-)-pironetin. J Am Chem Soc 128:7438-9
Nelson, Scott G; Zhu, Cheng; Shen, Xiaoqiang (2004) Catalytic asymmetric acyl halide-aldehyde cyclocondensation reactions of substituted ketenes. J Am Chem Soc 126:14-5
Zhu, Cheng; Shen, Xiaoqiang; Nelson, Scott G (2004) Cinchona alkaloid-lewis acid catalyst systems for enantioselective ketene-aldehyde cycloadditions. J Am Chem Soc 126:5352-3