2-Chloro-1-(2,4,4-trimethyl-2,3,4,5-tetra­hydro-1H-1,5-benzodiazepin-1-yl)ethanone

In the title compound, C₁₄H₁₉ClN₂O, the diazepine ring adopts a boat conformation. The Cl atom of the chloro­acetyl group is trans to the N atom of the diazepine ring. In the crystal, the mol­ecules form chains running along the diagonal of the ac plane through N—H...O hydrogen bonds.