Orally Absorbed Derivatives of the β-Lactamase Inhibitor Avibactam. Design of Novel Prodrugs of Sulfate Containing Drugs
作者:Eric M. Gordon、Matthew A. J. Duncton、Mark A. Gallop
DOI:10.1021/acs.jmedchem.8b01389
日期:2018.11.21
Only one FDA-approved β-lactamaseinhibitor has ever been orally available: clavulanicacid, approved in 1984. Avibactam, approved by FDA in 2015, is the first of a new class of BLIs called diazabicyclooctanes, or “DBOs”. This class has much broader coverage than clavulanicacid but can only be administered by intravenous injection. Herein, we describe the synthesis and testing of the first approved
Selective Synthesis and Structural Elucidation of <i>S</i>-Acyl- and <i>N</i>-Acylcysteines
作者:Alan R. Katritzky、Srinivasa R. Tala、Nader E. Abo-Dya、Kapil Gyanda、Bahaa El-Dien M. El-Gendy、Zakaria K. Abdel-Samii、Peter J. Steel
DOI:10.1021/jo900853s
日期:2009.9.18
N-(Acyl)-1H-benzotriazoles 6a−f react with l-cysteine 5 at 20 °C to give exclusively (i) N-acyl-l-cysteines 8a−e in the presence of triethylamine in CH3CN−H2O (3:1), but (ii) S-acyl-l-cysteines 7a−e in CH3CN−H2O (5:1) in the absence of base. Structures 7b, 7d and 8b, 8d are supported by 2D NMR spectroscopic methods including gDQCOSY, gHMQC, gHMBC, and 1H−15N CIGAR-gHMBC experiments. The structure of
N-(酰基)-1 H-苯并三唑6a - f在20°C下与1-半胱氨酸5反应,仅在CH 3 CN-H中存在三乙胺的情况下仅生成(i)N-酰基-1-半胱氨酸8a - e 2 O(3:1),但(ii)CH 3 CN-H 2 O(5:1)中在不存在碱的情况下的S-酰基-1-半胱氨酸7a - e。结构7b,7d和8b,8d支持2D NMR光谱方法,包括gDQCOSY,gHMQC,gHMBC和1 H - 15 N CIGAR-gHMBC实验。化合物8d的结构也通过单晶X射线衍射来支撑。