Crystal structure determination of rac-11′-(1-acetyl-1H-indazol-3-yl)-11′,11a′-dihydro-10′H,17′H-spiro[indene-2,18′-[5a,16b]methanotriindeno[1,2-b:1′,2′-d:2′′,1′′-g]oxocine]-1,3,10′,12′,17′(10a′H)-pentaone acetonitrile 1.5-solvate

Abstract

The title compound, C46H26N2O7·1.5CH3CN, is the aldol condensation product of bindone with indazole-3-carbaldehyde followed by double intermolecular cyclization. The asymmetric unit, which has monoclinic P21/c symmetry, contains two independent molecules of the title compound and three acetonitrile molecules. The title molecule comprises a central eight-membered ring, which contains an enol–ester, from which five arms extend. The arms exhibit intermolecular interactions within the crystal lattice between molecules of the title compound and with co-crystallized solvent molecules (acetonitrile).

Keywords

• crystal structure
• indan-1,3-dione
• cyclization
• condensation
• eight-membered ring