Synthesis and Biological Evaluation of 8-Aminomethyltetracycline Derivatives as Novel Antibacterial Agents
作者:Roger B. Clark、Minsheng He、Yonghong Deng、Cuixiang Sun、Chi-Li Chen、Diana K. Hunt、William J. O’Brien、Corey Fyfe、Trudy H. Grossman、Joyce A. Sutcliffe、Catherine Achorn、Philip C. Hogan、Christopher E. Katz、John Niu、Wu-Yan Zhang、Zhijian Zhu、Magnus Ronn、Xiao-Yi Xiao
DOI:10.1021/jm401211t
日期:2013.10.24
The C-8 position of the tetracyclines has been largely underexplored because of limitations in traditional semisynthetic techniques. Employing a total synthetic approach allowed for modifications at the C-7 and C-8 positions, enabling the generation of structure activity relationships for overcoming the two most common tetracycline bacterial-resistance mechanisms: ribosomal protection (tet(M)) and efflux (tet(A)). Ultimately, several compounds were identified with balanced activity against both Gram-positive and Gram-negative bacteria, including pathogens bearing both types of tetracycline-resistance mechanisms. Compounds were screened in a murine systemic infection model to rapidly identify compounds with oral bioavailability, leading to the discovery of several compounds that exhibited efficacy when administered orally in murine pyelonephritis and pneumonia models.