Synthesis and biological evaluation of a series of parenteral 3'-quaternary ammonium cephalosporins
摘要:
The preparation and biological evaluation of a series of 7 beta-[2-(2-aminothiazol-4-yl)-2(Z)-methoximinoacetamido]cep halosporins, substituted at the 3'-position with monocyclic or bicyclic nitrogen-containing heterocycles are described. The resulting family of parenteral compounds displays a broad spectrum of antibacterial activity. Some compounds exhibit a similar level of Gram-negative activity to that of the "third-generation" cephalosporins with increased staphylococcal activity. The in vitro and in vivo antimicrobial activity, structure-activity relationships, beta-lactamase stability, and in vitro and in vivo pharmacological evaluations are presented.
An efficient method for the construction of 2-Aminothiazolo[5,4-c]pyridines via K3[Fe(CN)6] oxidized SP2 CH Functionalization
作者:De-Zhi Wu、Yong-Gang Zhi
DOI:10.1016/j.tet.2016.11.032
日期:2016.12
4-c]pyridines from simple asymmetric pyridylthioureas was achieved by utilizing K3[Fe(CN)6] as the oxidant. These reactions went through an intramolecular oxidation and finally led to the formation of CS bond. Furthermore, the possible oxidative cyclization mechanism was also explored by the addition of radical scavengers, which showed that the oxidative cyclization was promoted via a free radical mechanism.
通过利用K 3 [Fe(CN)6 ]作为氧化剂,从简单的不对称吡啶硫脲合成2-氨基噻唑并[5,4- c ]吡啶的实用方法。这些反应经过分子内氧化,最终导致形成CS键。此外,还通过添加自由基清除剂探索了可能的氧化环化机理,这表明通过自由基机理促进了氧化环化。
KATNER, ALLEN S.;BROWN, RAYMOND F., J. HEREROCYCL. CHEM., 27,(1990) N, C. 563-566
作者:KATNER, ALLEN S.、BROWN, RAYMOND F.
DOI:——
日期:——
BROWN, RAYMOND F.;KINNICK, MICHAEL D.;MORIN, JOHN M. (JR);VASILEFF, ROBER+, J. MED. CHEM., 33,(1990) N, C. 2114-2121
作者:BROWN, RAYMOND F.、KINNICK, MICHAEL D.、MORIN, JOHN M. (JR)、VASILEFF, ROBER+