A novel ring expansion and chain extension reaction has been discovered. The new reaction is completely regiospecific, takes place in excellent yield and appears to be capable of very broad application and extension, particularly in the area of medium- sized rings. Accordingly, it is proposed to extend the method to include heterocyclic compounds with emphasis on the pharmacologically useful benzazepines and dibenzazepines. Application to the synthesis of optically active beta-amino acids will be explored. Vinylogous ring expansion and inter- and intramolecular olefin trapping experiments will be carried out. The latter can yield new, efficient annulation methods. In addition to developing the one-carbon ring expansion, preliminary experimental findings have given positive results for three- and four-carbon ring expansions which open many new opportunities. These coupled with multiple ring expansion of keto diesters and diketo tetraesters provide a wealth of opportunity for elaboration of single and fused medium ring systems. The mechanistic premises underlying the reaction will also be examined.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Research Project (R01)
Project #
5R01GM039825-04
Application #
3297054
Study Section
Medicinal Chemistry Study Section (MCHA)
Project Start
1988-04-01
Project End
1993-03-31
Budget Start
1991-04-01
Budget End
1992-03-31
Support Year
4
Fiscal Year
1991
Total Cost
Indirect Cost
Name
University of Pittsburgh
Department
Type
Schools of Arts and Sciences
DUNS #
053785812
City
Pittsburgh
State
PA
Country
United States
Zip Code
15213