The aim of the invention to provide a less complex method for the production of A-ring aromatized acetyl minocyclines of the formula (I),
wherein R
1
to R
5
=acetyl and/or H, which can also be used on an industrial scale, is achieved in that minocycline hydrochloride is reacted with acetanhydride in the presence of a proton catcher, the reaction product is subjected to chromatographic filtration using a carrier material and an eluant, the eluant is distilled off, and the product is subsequently cleaned by recrystallization.
该发明的目的是提供一种生产式(I)中A环芳香化的乙酰基
米诺环素的较为简单的方法,其中R1至R5 = 乙酰基和/或H,可以在工业规模上使用。该方法通过在质子捕获剂的存在下将
米诺环素盐酸盐与
乙酸酐反应,将反应产物经过使用载体材料和洗脱剂的色谱过滤,蒸馏洗脱剂,然后通过再结晶来清洁产物。