Crystal structure and Hirshfeld surface analysis of 6-amino-8-phenyl-1,3,4,8-tetra­hydro-2H-pyrido[1,2-a]pyrimidine-7,9-dicarbo­nitrile

In the title compound, C(16)H(15)N(5), the 1,4-di­hydro­pyridine ring has a shallow boat conformation, while the 1,3-diazinane ring adopts an envelope conformation. In the crystal, pairwise N—H⋯N hydrogen bonds generate centrosymmetric dimers featuring R (2) (2)(12) motifs and C—H⋯N contacts connect these dimers to form double layers lying parallel to (001). Weak C—H⋯π and N—H⋯π inter­actions help to consolidate the double layers and van der Waals inter­actions occur between layers. A Hirshfeld surface analysis indicates that the most significant contributions to the crystal packing are from H⋯H (38.5%), N⋯H/H⋯N (33.3%) and C⋯H/H⋯C (27.3%) contacts.