Design and Synthesis of Novel Macrolones Bridged with Linkers from 11,12-Positions of Macrolides

Bioorg Med Chem Lett. 2022 Apr 25:128761. doi: 10.1016/j.bmcl.2022.128761. Online ahead of print.ABSTRACTResistance to telithromycin and off-target effects associated with the metabolic instability present serious and challenging problems for the development of novel macrolides. Herein, studies of hybrids of macrolides and quinolones (termed macrolones) bridged with linkers from 11,12-cyclic carbamate of macrolides revealed different structure-activity relationships from the previously reported macrolones bridged with linkers derived from 6-, 9- and 4''-positions of macrolides. The optimized macrolone 34g with a longer and rigid sidechain than telithromycin had improved metabolic stability compared to telithromycin (t1/2: 110 vs 32 min), whose future has been heavily clouded by metabolic issues. Moreover, 34g was 38-fold more potent than telithromycin against A2058/2059-mutated Mycoplasma pneumoniae (8 vs 315 μM), which may be attributed to a novel mode of action between the carboxylic acid of quinolone moiety and the bacterial ribosome. This work increases the prospect for discovery of novel and safe antibacterial agents to combat serious human infectious diseases.PMID:35483593 | DOI:10.1016/j.bmcl.2022.128761
Source: Bioorganic and Medicinal Chemistry Letters - Category: Chemistry Authors: Source Type: research