Total Syntheses of (±)-Platencin and (−)-Platencin
作者:K. C. Nicolaou、G. Scott Tria、David J. Edmonds、Moumita Kar
DOI:10.1021/ja906801g
日期:2009.11.4
The secondary metabolites platensimycin and platencin, isolated from the bacterial strain Streptomyces platensis, represent a novel class of natural products exhibiting unique and potent antibacterial activity. Platencin, though structurally similar to platensimycin, has been found to operate through a slightly different mechanism of action involving the dual inhibition of lipid elongation enzymes
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
Biomimetic Stereoselective Sulfa-Michael Addition Leads to Platensimycin and Platencin Sulfur Analogues against Methicillin-Resistant <i>Staphylococcus aureus</i>
sulfur-containing platensimycin (PTM) and platencin (PTN) analogues, with activities comparable to the parent natural products, have recently been discovered from microorganisms, implying a biomimetic route to diversify the PTM and PTN scaffolds for structure–activity relationship study. We present here a substrate-directed and scaleable semisynthetic strategy to make PTM and PTN sulfur analogues with excellent
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