Crystal structure of 14-methyl-11-(3-methylphenyl)-12-oxa-8,14-diazatetracyclo[8.3.3.01,10.02,7]hexadeca-2(7),3,5-triene-9,13-dione

Abstract

In the title compound, C21H20N2O3, the lactone ring adopts an envelope conformation with the quaternary C atom bonded to two other C atoms as the flap. The fused pyrrolidine ring adopts a twisted conformation about the Cq—N (q = quaternary) bond. In the crystal, inversion dimers linked by pairs of N—H...O hydrogen bonds generate R22(8) loops. The dimers are linked into [110] chains by pairs of C—H...O interactions, which generate R22(14) loops.

Keywords

• crystal structure
• tetracyclo
• hexadecatrienedione
• hydrogen bonding