Acta Cryst. (2013). E69, o1577-o1578 [ doi:10.1107/S1600536813025774 ]
Abstract: In the title compound, C20H27N5O3, the central piperazine ring adopts a chair conformation, with the N-bound carboxylate and methylene substituents occupying bisectional and equatorial orientations, respectively. A twist is evident between the aromatic rings [dihedral angle = 25.61 (9)°] but an intramolecular O-HN hydrogen bond persists between these. Supramolecular tapes along [1-10] are formed in the crystal packing through N(amino)-HO(hydroxyl) and N(amino)-HN(pyrimidinyl) hydrogen bonds, and these are linked into layers in the ab plane by - interactions [inter-centroid distance between pyrimidinyl rings = 3.5919 (9) Å].
CCDC reference: 961681
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