One-Pot Synthesis of 1- and 2-Substituted Naphtho[2,3-<i>d</i>][1,2,3]triazole-4,9-diones
作者:Jianjun Zhang、Cheng-Wei Tom Chang
DOI:10.1021/jo9004926
日期:2009.6.5
for the synthesis of 1-alkyl 1H-naphtho[2,3-d][1,2,3]triazole-4,9-dione and 2-alkyl 2H-naphtho[2,3-d][1,2,3]triazole-4,9-dione has been developed. By taking the advantage of difference in basicity, both products can be obtained in good purity. The unique heterocyclic scaffolds of these two products could exert interesting chemical and biological properties. The synthetic protocol is concise and suitable
一锅三组分[2 + 3]环加成反应,用于合成1-烷基1 H-萘[2,3- d ] [1,2,3]三唑-4,9-二酮和2-烷基2已经开发了H-萘[2,3- d ] [1,2,3]三唑-4,9-二酮。通过利用碱性不同的优点,可以得到纯度高的两种产品。这两种产品独特的杂环支架可以发挥有趣的化学和生物学特性。合成方案简明扼要,适用于按比例放大所需产物的合成。
Library Synthesis and Antibacterial Investigation of Cationic Anthraquinone Analogs
作者:Marina Y. Fosso、Ka Yee Chan、Rylee Gregory、Cheng-Wei Tom Chang
DOI:10.1021/co2002075
日期:2012.3.12
We report the parallel synthesis of a series of novel 4,9-dioxo-4,9-dihydro-1H-naphtho[2-,3-d][1,2,3],triazol-3-ium chloride salts, which are analogs to cationic anthraquinones. Three synthetic protocols were examined leading to a convenient and facile library synthesis of the cationic anthraquinone analogs that contain double alkyl chains of various lengths (C-2-C-12) at N-1 and N-3 positions. The antibacterial activities of these compounds were evaluated against Gram positive bacterium Staphyloccous aureus and Gram negative bacterium Escherichia coli. The antibacterial activities of these compunds were expected to be associated with the structural features of naphthoquinenone, cation and lypophilic alkyl chain and, interestingly, they showed much higher levels of antibacterial activites against G+ than G- bacteria. In addtion, when the total number of carbon atoms of the alkyl groups at both N-1 and N-3 positions lies between 9 and 18, the bactericidal activity against S aureus increased with increasing alkyl chain length at both N-atoms with MIC <= 1 mu g/mL.