| 摘要 |
A process for preparing 2-amino-6-chloropurine or a 2-acylated derivative thereof, comprising reacting guanine or 2,9-dia- cylguanine with a chlorinating agent, in the presence of methyltriethylammonium chloride as phase transfer catalyst, and thereaf- ter when necessary, removing the 9-acyl group by hydrolysis.
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