申请人:Ash Stevens, Inc.
公开号:US05110919A1
公开(公告)日:1992-05-05
A process for the preparation of 2,6-diamino-9-(2,3,5-tri-O-benzyl-beta-D-arabinofuranosyl)purine (V) by reacting 2,6-di(alkoxyacetamido)purine (II) with 2,3,5-tri-O-benzyl-1-chloro-alpha-D-arabinofuranose (III) to produce 2,6-di(alkoxyacetamido)-9-(2,3,5-tri-O-benzyl-beta-D-arabinofuranosyl)puri ne (IV) and then deprotecting the 2,6-positions to produce the 2,6-diamine (V) is described. The process provides purine (V) in high yield. Purine (V) is an intermediate in the preparation of 9-beta-D-arabinofuranosyl-2-fluoroadenine which is a cytotoxic agent.
通过将2,6-二(烷氧基乙酰胺基)嘌呤(II)与2,3,5-三-O-苄基-1-氯-α-D-阿拉伯呋喃糖(III)反应,制备2,6-二(烷氧基乙酰胺基)-9-(2,3,5-三-O-苄基-β-D-阿拉伯呋喃糖基)嘌呤(IV),然后去保护2,6-位置以产生2,6-二胺(V)的方法被描述。该过程提供高产率的嘌呤(V)。嘌呤(V)是制备细胞毒药物9-β-D-阿拉伯呋喃基-2-氟腺嘌呤的中间体。