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In the title compound C38H32N4O3, one pyrrolidine ring adopts an envelope conformation with the N atom as the flap while other pyrrolidine ring adopts an twisted conformation. The pyrrolizine ring forms dihedral angles of 79.24 (5) and 77.57 (5)° with the chromene and indole rings, respectively. The carbonyl O atoms deviate from the least-square planes through the chromene and indole rings by 0.0113 (12) and 0.0247 (12) Å, respectively. In the crystal, non-classical C—H...O inter­actions link the mol­ecules, generating an C(9) chain along the b-axis direction.

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In the title compound, C26H22N2O4, the central pyrrolidine ring adopts a twist conformation and the cyclo­pentane ring of the dihydro­acenapthylene group adopts an envelope conformation with the spiro C atom as the flap. The naphthalene ring system of the dihydro­acenaphthyl­ene group forms dihedral angles of 83.4 (9) and 61.3 (7)°, respectively, with the mean planes of the pyrrolidine and indole rings. The crystal packing is stabilized by inter­molecular C—H...O hydrogen bonds. The title compound is a diastereomer of a previously reported structure.
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