Synthesis, crystal structure and Hirshfeld surface analysis of 3-(4,4-dimethyl-2,3,4,5-tetra­hydro-1H-1,5-benzodiazepin-2-yl­idene)-6-methyl-3,4-di­hydro-2H-pyran-2,4-dione

The title compound, C(17)H(18)N(2)O(3), is constructed from a benzodiazepine ring system linked to a pendant di­hydro­pyran ring, where the benzene and pendant di­hydro­pyran rings are oriented at a dihedral angle of 15.14 (4)°. Intra­molecular N—H(Diazp)⋯O(Dhydp) and C—H(Diazp)⋯O(Dhydp) (Diazp = diazepine and Dhydp = di­hydro­pyran) hydrogen bonds link the seven-membered diazepine ring to the pendant di­hydro­pyran ring, enclosing S(6) ring motifs. In the crystal, N—H(Diazp)⋯O(Dhydp) hydrogen bonds link the mol­ecules into infinite chains along [10[Image: see text]]. These chains are further linked via C—H(Bnz)⋯O(Dhydp), C—H(Dhydp)⋯O(Dhydp) and C—H(Mth)⋯O(Dhydp) (Bnz = benzene and Mth = meth­yl) hydrogen bonds, forming a three-dimensional network. The observed weak C—H(Diazp) ⋯ π inter­action may further stabilize the structure. Hirshfeld surface analysis of the crystal structure indicates that the most important contributions for the crystal packing are from H⋯H (51.1%), H⋯C/C⋯H (25.3%) and H⋯O/O⋯H (20.3%) inter­actions. Hydrogen bonding and van der Waals inter­actions are the dominant inter­actions in the crystal packing.