Structural Revision of Baulamycin A and Structure-Activity Relationships of Baulamycin A Derivatives.
J Org Chem
; 82(24): 12947-12966, 2017 12 15.
Article
in En
| MEDLINE
| ID: mdl-28903000
ABSTRACT
Total synthesis of the proposed structure of baulamycin A was performed. The spectral properties of the synthetic compound differ from those reported for the natural product. On the basis of comprehensive NMR study, we proposed two other possible structures for natural baulamycin A. Total syntheses of these two substances were performed, which enabled assignment of the correct structure of baulamycin A. Key features of the convergent and fully stereocontrolled route include Evans Aldol and Brown allylation reactions to construct the left fragment, a prolinol amide-derived alkylation/desymmetrization to install the methyl-substituted centers in the right fragment, and finally, a Carreira alkynylation to join both fragments. In addition, we have determined the inhibitory activities of novel baulamycin A derivatives against the enzyme SbnE. This SAR study provides useful insight into the design of novel SbnE inhibitors that overcome the drug resistance of pathogens, which cause life-threatening infections.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Resorcinols
/
Enzyme Inhibitors
/
Fatty Alcohols
Language:
En
Journal:
J Org Chem
Year:
2017
Type:
Article