title: Methyl (3aRS,3cRS,6cSR,7RS,8RS,8aSR)-2,5-bis(4-chlorophenyl)-7,9-bis(1,3-diphenyl-1H-pyrazol-4-yl)-1,3,4,6-tetraoxododecahydro-1H-dipyrrolo[3,4-a:3',4'-f]pyrrolizine-3b-carboxylate dimethylformamide disolvate: a three-dimensional hydrogen-bonded framework.
abstract: The racemic title dipyrrolopyrrolizine compound crystallizes from dimethylformamide as a disolvate, C(55)H(39)Cl(2)N(7)O(6)·2C(3)H(7)NO. None of the four fused heterocyclic rings is planar; one adopts an envelope conformation, two others adopt half-chair conformations and the fourth adopts a conformation intermediate between an envelope and a half-chair. The arrangement of the ring fusions is such as to preclude the possibility of internal mirror symmetry. The three independent molecular components are weakly linked by C-H···O hydrogen bonds, and the dipyrrolopyrrolizine molecules are linked by a combination of four C-H···O and one C-H···π(arene) hydrogen bond to form a three-dimensional framework, from which the dimethylformamide solvent molecules are pendent. However, aromatic π-π stacking interactions are absent in the structure.
authors.affiliation: Grupo de Investigación de Compuestos Heterocíclicos, Departamento de Química, Universidad de Valle, AA 25360 Cali, Colombia.
authors.forename: Jairo
authors.initials: J
authors.lastname: Quiroga
authors.forename: Jaime
authors.initials: J
authors.lastname: Gálvez
authors.forename: Justo
authors.initials: J
authors.lastname: Cobo
authors.forename: Christopher
authors.initials: C
authors.lastname: Glidewell