Synthesis of pyridazine analogs of the naturally occurring nucleosides cytidine, uridine, deoxycytidine and deoxyuridine
作者:David J. Katz、Dean S. Wise、Leroy B. Townsend
DOI:10.1021/jm00349a009
日期:1982.7
treated in the same manner as 7 to yield 4-amino-1-(2-deoxy-beta-D-erythro-pentofuranosyl)pyridazin-6-one (32, 6-aza-3-deaza-2'-deoxycytidine) and 4-hydroxy-1-(2-deoxy-beta-D-erythro-pentofuranosyl)pyridazin-6-one (32, 6-aza-3-deaza-2'-deoxycytidine) and 4-hydroxy-1-(2-deoxy-beta-D-erythro-pentofuranosyl)pyridazin-6-one (34, 6-aza-3-deaza-2'-deoxy-uridine). 6-Aza-3-deazauridine (15) was found to inhibit
完成了4,5-二氯-3-[(三甲基甲硅烷基)氧基]哒嗪(5)与1-O-乙酰基-2,3,5-三-O-苯甲酰基-β-D-呋喃呋喃糖(6)的缩合反应通过氯化锡方法得到4,5-二氯-1-(2,3,5-三-O-苯甲酰基-β-D-呋喃呋喃糖基)哒嗪-6-一(7)。讨论了用于明确确定7的核糖基化和异头构型的位点的方法。用液氨处理7,会同时除去保护基团和选择性地亲核取代4-氯基团。随后的脱卤作用产生4-氨基-1-(β-D-呋喃呋喃糖基)吡啶并嗪6-1(11,6-氮杂-3-脱氮胞苷)。用甲醇钠的甲醇溶液处理7,然后脱卤并用碱水溶液水解,得到4-羟基-1-β-D-呋喃呋喃糖基吡啶并嗪-6-一(6-氮杂-3-脱氮尿嘧啶,15)。描述了衍生自7、11和15的各种核苷的合成。5与3,5-二-对甲苯甲酰基-2-脱氧-D-赤-戊呋喃糖酰氯(27)的缩合反应得到封端的异头2'-脱氧核苷28和29的混合物。以与7相同的方式