Structure activity relationship of pyridoxazinone substituted RHS analogs of oxabicyclooctane-linked 1,5-naphthyridinyl novel bacterial topoisomerase inhibitors as broad-spectrum antibacterial agents (Part-6)
作者:Sheo B. Singh、David E. Kaelin、Jin Wu、Lynn Miesel、Christopher M. Tan、Peter T. Meinke、David B. Olsen、Armando Lagrutta、Changqing Wei、Yonggang Liao、Xuanjia Peng、Xiu Wang、Hideyuki Fukuda、Ryuta Kishii、Masaya Takei、Masanobu Yajima、Taku Shibue、Takeshi Shibata、Kohei Ohata、Akinori Nishimura、Yasumichi Fukuda
DOI:10.1016/j.bmcl.2015.06.057
日期:2015.9
Oxabicyclooctane linked 1,5-naphthyridinyl-pyridoxazinones are novel broad-spectrum bacterial topoisomerase inhibitors (NBTIs) targeting bacterial DNA gyrase and topoisomerase IV at a site different than quinolones. Due to lack of cross-resistance to known antibiotics they present excellent opportunity to combat drug-resistant bacteria. A structure activity relationship of the pyridoxazinone moiety is described in
氧杂双环辛烷连接的1,5-萘啶基-吡啶并恶嗪酮是新型广谱细菌拓扑异构酶抑制剂(NBTI),其靶向细菌DNA促旋酶和拓扑异构酶IV的位置不同于喹诺酮。由于对已知抗生素缺乏交叉耐药性,因此它们提供了抵抗耐药细菌的绝好机会。吡ido嗪酮部分的结构活性关系在该信中描述。已经描述了在吡啶并嗪嗪酮部分的C-3,C-4和C-7处被卤素,烷基和甲氧基取代的NBTI的化学合成和活性。另外,已经报道了连接子NH质子的取代及其转化为AM-8085和AM-8191的酰胺类似物。吡ido并嗪酮部分的C-3处的氟,氯和甲基基团保留了效价和光谱。在金黄色葡萄球菌感染的鼠菌血症模型中,与母体AM-8085相比,其浓度为50 3.9 mg / kg)。吡ido并嗪酮单元的C-3甚至不容许极性适度的极性(例如甲氧基)。当CH 2在接头位置8上时,接头的碱性和NH基团对于活性很重要。然而,具有7位NH或N-甲基基团的酰胺(具有