6-Amino-9-(carboxymethyl)-2-methoxypurine Methyl Ester

The hydrogenolysis of 6-azido-9-(carboxymethyl)-2-methoxypurine methyl ester, (3), formed in a single step from 2,6-dichloro-9-(carboxymethyl)purine ethyl ester, (2), gave the title compound, C₉H₁₁N₅O₃, (1). The side chain attached at N9 avoids steric hindrance with the heterocycle by emerging almost orthogonally [C8-N9-C10-C11 - 104.5 (2)°] and the amino group at N6 donates intermolecular hydrogen bonds to the ring N1 and ester carbonyl O11 atoms.

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