PROCESS FOR THE PREPARATION OF SUBSTITUTED PYRIDONE CARBOXYLIC ACIDS
申请人:KULANGARA VIJAYA RAJ KUNIYIL
公开号:US20100076199A1
公开(公告)日:2010-03-25
The present invention relates to methods for the preparation of pyridone carboxylic acids for use as intermediates in the preparation of various synthetic organic compounds. The pyridone carboxylic acids can for example be used as intermediates in the production of potent antitumor agents, antifungal agents, antiviral agents, psychotherapeutic agents or contrast imaging agents for MRI.
Design, Synthesis, and Antimicrobial Evaluation of Hexadentate Hydroxypyridinones with High Iron(III) Affinity
作者:Ming-Xia Zhang、Chun-Feng Zhu、Ying-Jun Zhou、Xiao-Le Kong、Robert C Hider、Tao Zhou
DOI:10.1111/cbdd.12358
日期:2014.12
A range of hexadentate 3‐hydroxypyridin‐4‐ones (HPOs) with high affinity for iron(III) has been synthesized. The log stability constants of two HPO–iron complexes (logK1) were determined to be over 34, and pFe values of the two HPOs were determined to be over 31. Antimicrobial assay indicated that they are able to markedly inhibit the growth of both Gram‐positive and Gram‐negative bacteria. Compounds 14a and 14e were found to exhibit the strongest inhibitory activity against Staphyloccocus aureus, Bacillus subtilis, Pseudomonas aeruginosa, and Escherichia coli, with MIC values of 8, 8, 16, and 8 μg/mL, respectively. These results indicate that hexadentate 3‐hydroxypyridin‐4‐ones have potential application as antimicrobial agents, especially in the treatment of wound infection.
Design and synthesis of 5-aminolaevulinic acid/3-hydroxypyridinone conjugates for photodynamic therapy: enhancement of protoporphyrin IX production and photo-toxicity in tumor cells
作者:Tao Zhou、Le-Le Shao、Sinan Battah、Chun-Feng Zhu、Robert C. Hider、Brandon J. Reeder、Asma Jabeen、Alexander J. MacRobert、Gerui Ren、Xinle Liang
DOI:10.1039/c6md00040a
日期:——
ALA–HPO conjugate significantly enhanced PpIX production in a range of tumor cell lines over ALA alone or the co-administration of ALA and CP94 (1,2-diethyl-3-hydroxypyridin-4-one). The intracellular porphyrin fluorescence levels showed good correlation with cellular photo-toxicity following light exposure, suggesting the potentialapplication of the ALA–HPO conjugates in photodynamictherapy.