3'-O-Acyl- and 3-'-O-acyl-5-'-O-acyl- derivatives of 1-(.beta.-D-arabinofuranosyl)-cytosines and methods of preparing these compounds and also O.sup.2,2'-anhydro-1-(3'-O-acyl-5'-O-acyl-.beta.-D-arabinofuranosyl)-cytos ine salts. The O.sup.2,2'-anhydro-1-(3'-O-acyl-5'-O-acyl-.beta.-D-arabinofuranosyl)-cytos ine nucleoside salts are prepared by direct acid catalyzed acylation of the salts of the corresponding O.sup.2,2'-anhydro-1-(.beta.-D-arabinofuranosyl)-cytosines or 3'-O-acyl- derivatives, under carefully controlled conditions. The 3'-O-acyl- and 3'-O-acyl-5'-O-acyl-1-(.beta.-D-arabinofuranosyl)-cytosines are prepared from the corresponding O.sup.2,2'-anhydro nucleosides via selective cleavage of the O.sup.2,2'-anhydro bridge under carefully controlled conditions. The compounds exhibit anti-viral, cytotoxic and anti-neoplastic activity, and thus are useful for the treatment of mammals where such agents are indicated.
1-(β-D-阿拉伯
呋喃糖基)-
胞嘧啶的3'-O-酰基和3'-O-酰基-5'-O-酰基衍
生物及其制备方法,还包括O.sup.2,2'-去
水-1-(3'-O-酰基-5'-O-酰基-β-D-阿拉伯
呋喃糖基)-
胞嘧啶盐。通过直接酸催化酰化相应的O.sup.2,2'-去
水-1-(β-D-阿拉伯
呋喃糖基)-
胞嘧啶或3'-O-酰基衍
生物的盐,在仔细控制的条件下制备O.sup.2,2'-去
水-1-(3'-O-酰基-5'-O-酰基-β-D-阿拉伯
呋喃糖基)-
胞嘧啶核苷盐。通过在仔细控制的条件下选择性断裂O.sup.2,2'-去
水桥制备3'-O-酰基和3'-O-酰基-5'-O-酰基-1-(β-D-阿拉伯
呋喃糖基)-
胞嘧啶,这些化合物表现出抗病毒、细胞毒性和抗肿瘤活性,因此在需要这些药物的哺乳动物的治疗中非常有用。