通过将2,6-二卤代嘌呤与3-乙酰基-5-苯甲酰基-2-脱氧偶合,合成2-卤代9-(2-脱氧-2-氟-β-D-阿拉伯呋喃糖基)ni啶(4b和4d)描述了-2-氟-D-阿拉伯呋喃糖基溴化物(2),然后取代6-卤素并同时去除了酰基保护基团。必须通过2-氨基腺嘌呤核苷4e的重氮化-氟化来制备2-氟鸟嘌呤衍生物4g。所有三种核苷均能使接种P388白血病的小鼠的寿命延长。当在白血病细胞植入后第1、5和9天每3h x 8给予化合物时,可获得最佳结果。通过4f脱乙酰基化并在4h脱氧后再去除5a的苯甲酰基制得的2',3'-二脱氧核苷5b在细胞培养中对HIV具有轻微的活性。
Isolation, Synthesis, and Characterization of Impurities and Degradants from the Clofarabine Process
作者:Bruce G. Anderson、William E. Bauta、William R. Cantrell, Jr.、Tracy Engles、Dennis P. Lovett
DOI:10.1021/op800182x
日期:2008.11.21
process impurities and their subsequent isolation, synthesis, and characterization is described. Two isomeric process impurities resulting from N6-attachment of a fluoroarabinose to clofarabine were found. Clofarabine’s base degradation products, which were different from the process impurities, were also synthesized and characterized. These compounds resulted from modifications to the sugar moiety, the