A compound of the formula ##STR1## wherein R.sub.1 represents a hydrogen atom or a hydroxy group, one of R.sub.2 and R.sub.3 represents a hydrogen atom, the other of R.sub.2 and R.sub.3 represents a hydrogen atom or a hydroxy group and X is a hydrogen atom or a trifluoro acetyl group. The N-trifluoroacetyl 7S:9S and 7R:9R derivatives of the .alpha.-glycosides of formula XV can be separated by chromatography on silica gel to obtain, after mild alkaline hydrolysis the wanted 7S:9S .alpha.-glycosides (R.sub.1 =H) as free bases and can eventually be transformed into their corresponding doxorubicin derivatives (R.sub.1 =OH) by known procedures.
化合物的公式为##STR1##其中R.sub.1代表氢原子或羟基,R.sub.2和R.sub.3中的一个代表氢原子,另一个代表氢原子或羟基,X代表氢原子或三
氟乙酰基。公式XV的α-糖苷的N-三
氟乙酰基7S:9S和7R:9R衍
生物可以通过
硅胶色谱分离,经过轻微碱性
水解后可以获得所需的7S:9Sα-糖苷(R.sub.1=H)作为自由碱,并且最终可以通过已知的方法转化为相应的
多柔比星衍
生物(R.sub.1=OH)。