Azalides: synthesis and antibacterial activity of novel 9a-N-(N′-substituted carbamoyl and thiocarbamoyl) derivatives of 9-deoxo-9a-aza-9a-homoerythromycin A
摘要:
A series of 9a-N-(N'-substituted carbamoyl and thiocarbamoyl) derivatives of 9-deoxo-9a-aza-9a-homoerythromycin A was synthesized and structurally characterized by spectroscopic methods and X-ray crystallographic analysis. The new compounds were evaluated in vitro against a panel of Gram-positive and Gram-negative bacteria and their antibacterial activities compared with those of the parent 9a-amine 2 and azithromycin 3. The results indicate that this type of structural modification offers no benefit over 2 and that the potency of the majority of these compounds in vitro decreased in comparison with 3. Among the tested azalides, the N'-isopropylcarbamoyl derivative 4 and the N'-benzylthiocarbamoyl derivative 12 showed the most potent antibacterial in vitro activity.
Azalides: synthesis and antibacterial activity of novel 9a-N-(N′-substituted carbamoyl and thiocarbamoyl) derivatives of 9-deoxo-9a-aza-9a-homoerythromycin A
A series of 9a-N-(N'-substituted carbamoyl and thiocarbamoyl) derivatives of 9-deoxo-9a-aza-9a-homoerythromycin A was synthesized and structurally characterized by spectroscopic methods and X-ray crystallographic analysis. The new compounds were evaluated in vitro against a panel of Gram-positive and Gram-negative bacteria and their antibacterial activities compared with those of the parent 9a-amine 2 and azithromycin 3. The results indicate that this type of structural modification offers no benefit over 2 and that the potency of the majority of these compounds in vitro decreased in comparison with 3. Among the tested azalides, the N'-isopropylcarbamoyl derivative 4 and the N'-benzylthiocarbamoyl derivative 12 showed the most potent antibacterial in vitro activity.