N-trifluoroacetyl and O-acetyl (or O-p-nitrobenzoyl) groups, underwent stereospecific coupling to the anthracycline aglycon by the glycal procedure to give, after deprotection, the alpha glycoside 12. All three analogs were assayed in vivo against P388 lymphocytic leukemia. They showed little (T/C 125 for 8; T/C 115 for 9) or no (compound 12) activity, but were essentially devoid of toxicity at the dose-levels tested
在Koenigs-Knorr条件下,将2,3,6-丁氧基-3-三
氟乙酰氨基-4-O-三
氟乙酰基-α-
D-阿拉伯糖基己
吡喃糖基
氯(19)(或相应的4-
对硝基苯甲酸酯,20)糖基化在分离出端基异构体并除去保护基团之后,以可接受的收率得到了各个目标糖苷8(α端基异构体;主要产物)和9(β端基次要的)。相反,用N-三
氟乙酰基和O-乙酰基(或Op-
硝基苯甲酰基)基团适当保护的标题二
氨基糖,通过糖基方法与
蒽环类糖苷配基立体定向偶联,在脱保护后得到α糖苷12。这三个在体内测定了类似物对P388淋巴细胞白血病的作用。他们显示很少的活性(T / C 125为8; T / C 115为9)或没有(化合物12)活性,