5-Oxatetracyclines were synthesized from d-arabinose using sequential Michael–Claisen cyclization reactions via a 5-oxa-AB enone substrate. The 5-oxatetracyclines were found to have poor stability in aqueous buffer (pH 7.4, 37 °C) and showed little to no inhibition of bacterial growth (S. aureus, E. coli).
5-doxtracyclines是由d-
阿拉伯糖通过连续的Michael-Claisen环化反应通过5-oxa-AB烯酮底物合成的。发现5-
草酸酯四环素在
水性缓冲液(pH 7.4,37°C)中的稳定性较差,对细菌生长(
金黄色葡萄球菌,大肠杆菌)的抑制作用很小甚至没有。