一系列的席夫碱(化合物1 - 10)通过穿过两个缩合杂环/芳族醛与杂环/芳族胺的合成,现有的方法和微波辅助合成。通过IR光谱,质谱,1 H NMR和元素分析确认化合物。通过区域抑制法测定了这些化合物对所选革兰氏阳性,革兰氏阴性细菌和某些真菌菌株的抗菌活性。还确定了每种化合物的最小抑菌浓度(MIC)。通过微波辅助合成,反应时间大大减少。化合物2的MIC低至50μg/ ml (针对大肠杆菌,黑曲霉和产黄青霉(Penicillium chrysogenum)和10(对抗枯草芽孢杆菌)。该研究通过有效和简单的反应以及温和的反应条件提出了一系列潜在的抗菌剂,从而提供了一种绿色化学方法。
[2+2+2] cycloadditionreaction with two alkyne molecules under nickelcatalysis to afford a 1,2‐dihydropyridine derivative in moderate to good yield. The reaction is likely to involve oxidative cyclization of the imine and alkyne, insertion of another alkyne, and CN reductive elimination, followed by a 1,5‐sigmatropic hydrogen shift. The pyridyl group is proposed to facilitate the reaction by chelation