A process for the production of cladribine, 2-chloro-2′-deoxyadenosine, is provided which involves the direct glycosylation of 2-chloro-6-aminopurine with 1-chloro-2-deoxy-3,5-di-O-p-toluoyl-&agr;-D-erythropentofuranose. The process is carried out by first forming the sodium salt of 2-chloro-6-aminopurine and allowing the sodium salt to react with 1-chloro-2-deoxy-3,5-di-O-p-toluoyl-&agr;-D-erythropentofuranose in the presence of a moderately polar solvent such as acetone. The final product, cladribine, is produced by removal of the p-toluoyl groups by the action of methanolic ammonia or methanolic sodium methoxide.
提供一种制备克拉德利宾(2-
氯-
2'-脱氧腺苷)的方法,其中涉及将
2-氯-6-氨基嘌呤直接与1-
氯-2-脱氧-3,5-二-O-p-
甲苯基-&agr;-D-红细胞五糖苷化。该过程首先通过形成
2-氯-6-氨基嘌呤的钠盐,并在存在适度极性溶剂(如
丙酮)的情况下使钠盐与1-
氯-2-脱氧-3,5-二-O-p-
甲苯基-&agr;-D-红细胞五糖反应。最终产品克拉德利宾是通过使用
甲醇氨或
甲醇甲基
钠的作用去除p-
甲苯基基团而产生的。