7'-Amino-1'H-spiro-[cyclo-heptane-1,2'-pyrimido[4,5-d]pyrimidin]-4'(3'H)-one.
The title compound, C(12)H(17)N(5)O, was obtained by cyclo-condensation of 2,4-diamino-pyrimidine-5-carbonitrile with cyclo-hepta-none. The tetra-hydro-pyrimidine ring has a dis-torted boat conformation and the cyclo-heptane ring adopts a chair conformation. In the crystal, molecules are linked via N-H⋯O and N-H⋯N hydrogen bonds generating a three-dimensional network.
School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081,  People's Republic of China.
Shu
S
Chen
Daxin
D
Shi
Mingxing
M
Liu
Jiarong
J
Li