Azido derivatives of 7-methylpurine were synthesized from 2, 6-dichloro-7-methylpurine (I) and 2, 6, 8-trichloro-7-methylpurine (II), and they were catalytically reduced to corresponding amino derivatives. From the results, it might be thought that the azido groups on purines existed as -N=N+=N- and did not form tetrazole ring.
