The proposed research is aimed at completing a convergent, stereoselective total synthesis of a recently characterized glycoslyphosphatidylinositol (GPI)-anchoring inhibitor YW3548. YW3548 consists of unusual tricarbocyclic sesterterpenoid delta-lactone framework and is a very potent inhibitor of GPI synthesis in eukaryotic cells. The proposed convergent synthesis will feature a sequential intermolecular carbonyl addition to a vinyl carbanion followed by an intramolecular nucleophile acyl substitution mediated by diiododsamarium to form the functionalized eight-membered carbocyclic ring B. This approach is unique in that it produces alkenyl, oxo and diol substituents, which will provide handles for synthetic elaboration of the generated eight-membered ring. The strategies for formation of the molecules involved in the sequenced reaction are described along with a route to the completion of YW3548.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Postdoctoral Individual National Research Service Award (F32)
Project #
1F32GM020823-01
Application #
6294284
Study Section
Medicinal Chemistry Study Section (MCHA)
Program Officer
Marino, Pamela
Project Start
2001-05-01
Project End
Budget Start
2001-05-01
Budget End
2002-04-30
Support Year
1
Fiscal Year
2001
Total Cost
$33,260
Indirect Cost
Name
University of Pennsylvania
Department
Chemistry
Type
Schools of Arts and Sciences
DUNS #
042250712
City
Philadelphia
State
PA
Country
United States
Zip Code
19104