进行了新型氯霉素苯并双吡喃类似物的合成,表征和抗菌研究。结构与抗菌活性之间的关系研究表明,氯霉素的苯并双吡喃类似物对革兰氏阳性菌,金黄色葡萄球菌以及鼠李糖单胞菌和青霉菌菌株的活性最高,即使最低抑菌浓度为10 µg / mL,在其他细菌和真菌中也表现出中等活性生物。本研究中合成的所有化合物均通过IR,1 H NMR,13 C NMR,ESI-MS和元素分析进行了表征。
Synthesis of novel 2H,8H-pyrano[2,3-f]chromene-2,8-diones from 8-formyl-7-hydroxy-4-methylcoumarin
摘要:
We report the synthesis of novel 2H,8H-pyrano[2,3-f]chromene-2,8-dione based scaffolds by the reaction of 8-formyl-7-hydroxy-4-methylcoumarin with various active methylene compounds. A mechanism of a tandem Knoevenagel condensation and cyclisation reaction is proposed. The structure of all compounds was established on the basis of H-1 and C-13 NMR data, high resolution mass spectrometry and elemental analysis. (C) 2013 Elsevier Ltd. All rights reserved.