申请人:K.U. Leuven Research & Development
公开号:EP1186306A1
公开(公告)日:2002-03-13
The invention relates to a method for the chemical preparation of labeled nucleosides via an oxidative-ring-opening step and a reductive-ring-closure step starting from a labeled D-glucose nucleoside resulting in the corresponding D-ribose-nucleoside by removing the carbon atom 3 on the glucose and comprising the steps of:
1. a protection of the sugar ring hydroxyl groups,
2. a sugar-base condensation, whereby the base is a purine or a pyrimidine,
3. a deprotection of the sugar ring hydroxyl groups,
4. an oxidative-ring-opening and removal of the carbon atom 3, and
5. a reductive-ring-closure resulting in labeled D-ribose-nucleoside.
The invention further relates to a compound obtainable via the method according to the invention having the formula selected from [13C,15N] labeled 6'-O-mono- or 6'-O-bis-C1-C6-alkyloxytrityl-D-glycopyranosyl nucleosides, or [13C,15N] labeled tetra-O-acetyl-D-glycopyranosyl nucleosides or [13C,15N] labeled glycopyranosyl nucleosides.
该发明涉及一种化学制备标记核苷的方法,通过氧化环开启步骤和还原环闭合步骤,从标记的D-葡萄糖核苷开始,去除葡萄糖上的碳原子3,形成相应的D-核糖-核苷,包括以下步骤:1. 保护糖环羟基团,2. 糖基缩合,其中碱基为嘌呤或嘧啶,3. 解除糖环羟基团的保护,4. 氧化环开启和去除碳原子3,以及5. 还原环闭合,形成标记的D-核糖-核苷。该发明还涉及一种可通过该发明方法获得的化合物,其化学式选自[13C,15N]标记的6'-O-单或6'-O-双-C1-C6-烷氧三苄基-D-葡萄糖吡喃核苷,或[13C,15N]标记的四-O-乙酰基-D-葡萄糖吡喃核苷或[13C,15N]标记的葡萄糖吡喃核苷。