Discovery of 2-Sulfinyl-Diazabicyclooctane Derivatives, Potential Oral β-Lactamase Inhibitors for Infections Caused by Serine β-Lactamase-Producing Enterobacterales
viewpoints of medical cost and burden of healthcare personnel, oral therapy offers many advantages. In our search for novel diazabicyclooctane (DBO) BLIs possessing a thio-functional group at the C2 position, we discovered a 2-sulfinyl-DBO derivative (2), which restores the antibacterial activities of an orally available third-generation cephalosporin, ceftibuten (CTB), against various serine β-lactamase-producing
β-内酰胺和β-内酰胺酶抑制剂(BLI)的共同给药是治疗β-内酰胺耐药革兰氏阴性菌引起的细菌感染的成熟治疗措施之一,而对于口服活性BLI,克拉维酸只有两种选择和舒巴坦。此外,由于新的 β-内酰胺酶(包括属于 A 类 β-内酰胺酶、C 类和 D 类 β-内酰胺酶以及碳青霉烯酶的超广谱 β-内酰胺酶 (ESBL))的传播,这些 BLI 正在失去其临床用途。这些经典 BLI 几乎或不受抑制。从医疗费用和医护人员负担的角度来看,口服疗法具有许多优势。在我们寻找在 C2 位具有硫基官能团的新型二氮杂双环辛烷 (DBO) BLI 时,我们发现了一种 2-亚磺酰基-DBO 衍生物(2 ),它恢复了口服可用的第三代头孢菌素头孢布坦 (CTB) 对各种丝氨酸 β-内酰胺酶产生菌株的抗菌活性,包括耐碳青霉烯的肠杆菌科 (CRE)。它可以通过酯前药修饰口服吸收,并在与 CTB 组合时表现出体内功效。
Resolution and absolute configuration of bromofluoroacetic acid
The resolution of racemic bromofluoroacetic acid (BrFHCCO2H) 1 was effected by crystallisation of its diastereoisomeric α-methylbenzylamine salts. The crystal structure of the p salt (+)-3a (+)-BrFHCCO2H·(R)-(+)-α-methylbenzylamine} was solved by X-ray crystallography and the (S)-(+)/(R)-(−) absolute configuration was established for 1. Diastereoisomeric esters 5a and 5b, obtained by addition of bromofluoroacetic
A versatile protein labeling system was developed using non-β-lactam β-lactamase inhibitors. Fluorophore-diazabicyclooctane prodrug conjugates efficiently and stably labeled β-lactamase tag-fused proteins localized in various intracellular compartments in living cells. Furthermore, use of a pH-activatable fluorophore allowed visualization of lysosomal protein trafficking at the late stage of autophagy
[EN] BETA-LACTAMASE INHIBITOR COMPOUNDS<br/>[FR] COMPOSÉS INHIBITEURS DE BÊTA-LACTAMASE
申请人:ENTASIS THERAPEUTICS LTD
公开号:WO2018053215A1
公开(公告)日:2018-03-22
The present invention is directed to compounds which are beta-lactamase inhibitors. The compounds and their pharmaceutically acceptable salts are useful in combination with beta- lactam antibiotics, for the treatment of bacterial infections, including infections caused by drug resistant organisms, including multi-drug resistant organisms. The present invention includes compounds according to Formula (I): or a pharmaceutically acceptable salt thereof, wherein the values of R1, R2, R3, R4, R5 and R6 are described herein.