Platencin is a novel antibiotic which is active against multiresistant pathogens. We describe efficient syntheses of three platencin analogues of varying activities which allow further conclusions about the pharmacophoric part of the molecule. The unnatural antibiotic iso‐platencin, which is about as active as natural platencin, but much more selective, was identified as a new lead structure.
recently discovered antibiotic, has become a highly competitive synthetic target, due to its promising bioactivity and its unusual complex molecular architecture. Herein, a particularly concise total synthesis of platencin starting from inexpensive perillaldehyde is described. The key features of this approach are (1) a highly diastereoselective Diels−Alder reaction with Rawal’s diene—forming the first
A novel route to (±)-platencin is reported, in which the highly stereoselective alkylative quaternization of a cyclohexenone scaffold via 1,4-diastereoinduction and two radical carbon–carbon bond-forming reactions that involve titanium(III)-mediated cyclization and stannyl-radical-mediated skeletal rearrangement are utilized.
A Chemoenzymatic and Fully Stereocontrolled Total Synthesis of the Antibacterial Natural Product (−)-Platencin
作者:Ee Ling Chang、Brett D. Schwartz、Alistair G. Draffan、Martin G. Banwell、Anthony C. Willis
DOI:10.1002/asia.201403069
日期:2015.2
(−)‐platencin is a potent antibacterial agent that exerts its effects through a novel mode of action. As such, it is an important lead in the development of next‐generation antibacterials that are urgently needed because of the rapidly developing resistance to current therapies. The work reported here concerns the development of a convergent and chemoenzymatic totalsynthesis of (−)‐platencin by methods