126589-88-6Relevant articles and documents
Preparation method for 2-amino-6-chloro-9-(4-acetoxy-3-acetoxymethylbutyl)purine
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Paragraph 0038; 0039, (2018/09/21)
The invention relates to a preparation method for 2-amino-6-chloro-9-(4-acetoxy-3-acetoxymethylbutyl)purine. The method comprises the following steps: performing a reaction on 1,3-dichloro-2-propanoland an acetate to obtain 1,3-diacetoxy-2-propanol, performing a bromination reaction to obtain 1,3-diacetoxy-2-bromopropane, performing a reaction on the 1,3-diacetoxy-2-bromopropane and zinc powder to obtain 1,3-diacetoxy-2-zinc bromide propane, performing a coupling reaction on the 1,3-diacetoxy-2-zinc bromide propane and 2-bromoethanol protected by hydroxyl, and performing a de-protection reaction to obtain 1,3-diacetoxy-2-(2-hydroxyethyl)propane, and performing a Mitsunobu reaction on the 1,3-diacetoxy-2-(2-hydroxyethyl)propane and 2-amino-6-chloropurine to obtain the 2-amino-6-chloro-9-(4-acetoxy-3-acetoxymethylbutyl)purine. According to the method provided by the invention, the 2-amino-6-chloro-9-(4-acetoxy-3-acetoxymethylbutyl)purine prepared by the method has purity of 99.5% or more detected by HPLC, and can be used to prepare famciclovir and penciclovir.