Lankamycin and rosaramicin are respectively 14 and 16 membered macrolides which belong to antibiotic families widely used in clinical and veterinary practice. This factor, added to their complex, polyfunctional skeleta have proved alluring to synthetic organic chemists and many advances in methodology have resulted from efforts directed towards their syntheses. Sugar-based approaches to macrolide synthesis have become popular within the past five years, but the attractiveness of the concept suffers from the limitation that (most) sugars are only five or six carbon units in length, and provisions for connecting two sugar subunits together invariably produce rich mixtures of diastereomers. Thus, any advantages gained by stereoselective syntheses of various sub-units are negated by the formation of such diastereomeric mixtures at advanced stages of the synthesis. In order to overcome these shortcomings, an approach based on """"""""folded glycoside"""""""" concept is being developed which features considerable chiral economy in that asymmetric centers on the sugar moieties are not """"""""wasted"""""""", and conversely, asymmetric centers on the target molecule are made to coincide with asymmetric centers on the sugar portion.

Agency
National Institute of Health (NIH)
Institute
National Institute of General Medical Sciences (NIGMS)
Type
Research Project (R01)
Project #
1R01GM034350-01
Application #
3285182
Study Section
Medicinal Chemistry Study Section (MCHA)
Project Start
1985-06-01
Project End
1988-05-31
Budget Start
1985-06-01
Budget End
1986-05-31
Support Year
1
Fiscal Year
1985
Total Cost
Indirect Cost
Name
Duke University
Department
Type
Schools of Arts and Sciences
DUNS #
071723621
City
Durham
State
NC
Country
United States
Zip Code
27705