A short and convergent strategy for the stereoselective total synthesis of biologically active natural product carolacton has been accomplished. Our synthesis highlights the Urpi acetal aldol, Crimmins aldol, Ireland–Claisen rearrangement, TiCl4-assisted aldol followed by β-hydroxy elimination to construct C7–C8 olefin, and ring-closing metathesis as the key steps for achieving the target molecule
作者:Michal S. Hallside、Richard S. Brzozowski、William M. Wuest、Andrew J. Phillips
DOI:10.1021/ol500004k
日期:2014.2.21
A synthesis of carolacton, a myxobacterial natural product that has profound effects on Streptococcus mutans biofilms, is reported. The synthesis proceeds via a longest linear sequence of 14 steps from an Evans beta-ketoimide and enabled preliminary evaluations of the effects of late-stage intermediates on S. mutans biofilms. These studies suggest that further investigations into carolacton's structure function relationships are warranted.