Key fragments of the cytotoxic marine macrolide mirabalin have been synthesized, by using a flexible strategy based on asymmetric reductions to control the hydroxyand carbamate-bearing stereocenters. In particular, ruthenium or rhodium-mediated asymmetric hydrogenation and transfer hydrogenation were used in combination with a dynamic kinetic resolution to control two contiguous stereocenters in a
Novel C-2 Substituted Carbapenem Derivatives Part III. Synthesis and Biological Activity of 2-(Functionalised Ethenyl, Oxyiminomethyl and .ALPHA.-(Hydroxy)benzyl)-Carbapenems.
作者:NICOLA J. C. CLEAR、JOHN S. DA VIES、A. JOHN EGLINGTON、STEPHEN C. M. FELL、JEREMY D. HINKS、NICHOLAS W. HIRD、ERIC HUNT、STEPHEN F. MOSS、MICHAEL J. PEARSON
DOI:10.7164/antibiotics.50.237
日期:——
The synthesis, antibacterial activity and stability to human dehydropeptidase-1 (DHP-1) of three small series of carbapenems carrying carbon-linked substituents at C-2 are described. C-2 Ethenyl carbapenems showed moderate antibacterial activity but poor stability to DHP-1. C-2 Oxyiminomethyl carbapenems demonstrated variable activity and stability. C-2 α-(Hydroxy)benzyl carbapenems were the most promising and showed good potency and DHP-1 stability.
Indole derivatives and their metal conjugates and uses thereof
申请人:Kulkarni Sudhir Appaji
公开号:US20080242652A1
公开(公告)日:2008-10-02
Provided are compounds which are indole derivatives, as well as pharmaceutical compositions containing the compounds. Also provided are methods of using the indole compounds for preventing or treating a disease, or a condition that predisposes to a disease, wherein the disease or condition is associated with activation of the serine/threonine kinase B (Akt) in an animal. The method comprises administering to the animal a preventive or treatment effective amount of the indole compound. Further provided is a method for increasing apoptosis of an animal cell comprising contacting the cell with the indole compound.
Hetero Diels−Alder Synthesis of 3-Hydroxypyridines: Access to the Nosiheptide Core
作者:Jin-Yong Lu、Hans-Dieter Arndt
DOI:10.1021/jo0703505
日期:2007.5.1
lead to the formation of the 6-isomer with exceptional regioselectivity (>95:5). This methodology was applied to a scaleable synthesis of the core structure of the potent antibiotic nosiheptide. Protecting groups were optimized, which led to a racemization-free seven-step synthesis of the key building block.
Cephem compounds, their preparation and their use as antimicrobial agents
申请人:Katayama Seiyakusyo Co., Ltd.
公开号:US05856320A1
公开(公告)日:1999-01-05
Novel cephalosporin derivatives of formula (II): ##STR1## wherein R.sup.2 is hydrogen, methyl, or fluoromethyl; R.sup.3 is hydrogen, methyl or carboxyl; R.sup.4 is hydrogen or methyl; A is methylene or propenylene; Q is nitrogen or CH, and pharmaceutically acceptable salts, solvates, hydrates and esters thereof, a process for their preparation and an antimicrobial composition containing them.