the catalyst. 3'-Amino-2',3'-dideoxycytidine (7) was synthesized by amination of the 3'-azido precursor of 3'-amino-2',3'-dideoxyuridine. The biological activity of 3'-amino-2',3'-dideoxy-5-fluorouridine (6) was notable among this group of aminonucleosides. It had an ED50 of 10 microM against adenovirus and was not appreciably cytotoxic to mammalian cells in culture. It also had activity against some
胸腺
嘧啶,尿
嘧啶和5-
碘尿
嘧啶的3'-
氨基-2',3'-二脱氧
核糖核苷(1-3)是通过相应的2'-脱氧
核糖核苷通过threo-3'-chloro和erythro-3'-合成的
叠氮基衍
生物。以3'-
氨基-2',3'-二脱氧
胸苷为
氨基戊糖基供体,以
胸苷磷酸化酶(
EC 2.4.2.4)为酶促合成了5-
溴尿
嘧啶,5-
氯尿
嘧啶和5-
氟尿
嘧啶(4-6)的相应
氨基核苷催化剂。通过
氨基化3′-
氨基-2′,3′-二脱氧
尿苷的3′-
叠氮基前体合成3′-
氨基-2′,3′-二脱氧
胞苷(7)。在这组
氨基核苷中,3'-
氨基-2',3'-二脱氧-
5-氟尿苷的
生物活性显着(6)。它对腺病毒的ED50为10 microM,对培养的哺乳动物细胞没有明显的细胞毒性。它也对某些革兰氏阳性细菌有活性,但对多种革兰氏阴性细菌没有活性。其他
氨基核苷(1-5和7)缺乏或表现出弱的抗病毒和抗菌活性。该组中唯一对培养的哺乳动物细胞有明显毒性