Dimethyl 8-Acetyl-2-Methyl-1,2-Dihydro-Quinoline-2,4-Dicarboxylate

Abstract

In the title compound, C<inf>16</inf>H<inf>17</inf>NO<inf>5</inf>, the six-membered N-containing ring has a half-boat form; the spiro C atom deviates by 0.34 (2) Å from the plane (r.m.s. deviation = 0.051 Å) defined by the N and four aromatic C atoms. Intramolecular N - H⋯O hydrogen bonding generates an S(6) ring motif and the dihedral angle between the mean plane though the S(6) ring and that through the five-atom half-boat plane is 3.39 (2)°. In the crystal, weak intermolecular C - H⋯O hydrogen bonds link molecules into zigzag chains along [001] due to c-glide symmetry, and C - H⋯π interactions extend along [010].