rac-7-[(2E)-But-2-enoyl]-13-chloro-N-cyclohexyl-7,8-dihydro-5H-isochromeno[4,3-c]phenanthridine-8-carboxamide

Abstract

In the title compound, C31H29ClN2O3, the two heterocyclic rings, belonging to a system of five condensed rings, adopt conformations intermediate between twist-boat and sofa. The secondary amide group is involved in a weak intramolecular N—H...N hydrogen bond. In the crystal, molecules are linked by pairs of C—H...Cl hydrogen bonds to form inversion dimers. These dimers are linked via a C—H...O interaction to form chains propagating along the b-axis direction.