The first total synthesis of the antimalarial aerucyclamide B has been achieved in 9% overall yield. Two thiazoles and a dipeptide were used to prepare two open precursors of cyclo-Gly-L-allo-Thr-L-Ile-Thz-D-allo-Ile-Thz. Cyclodehydration with Deoxo-Fluor of the beta-hydroxyamide present in the macrocycle, rendered aerucyclamide B (67%) and an unexpected fluorous derivative (28%). (C)13 Elsevier Ltd. All rights reserved.
Total Synthesis of Lysobactin
作者:Aikomari Guzman-Martinez、Ryan Lamer、Michael S. VanNieuwenhze
DOI:10.1021/ja067648h
日期:2007.5.1
needed. Lysobactin, a depsipeptide antibiotic has displayed very strong antibacterial activity against methicillin-resistant Staphylococcus aureus (MRSA) as well as vancomycin-resistant enterococci (VRE) with minimum inhibitory concentrations (MICs) ranging from 0.39 to 0.78 μg/mL. The MIC values against VRE were more than 50-fold lower than those reported for vancomycin itself. Lysobactin was found