title: (E)-3-[4-(Dimethyl-amino)-benzyl-idene]-2,3-di-hydro-1H,9H-pyrrolo-[2,1-b]quinazolin-9-one.
abstract: The title compound, C(20)H(19)N(3)O, was obtained by condensation of 2,3-dihydro-1H,9H-pyrrolo-[2,1-b]quinazolin-9-one (alkaloid de-oxy-vasicinone, isolated from Peganum Harmala) with 4-(dimethyl-amino)-benzaldehyde in the presence of sodium methoxide. The 2,3-dihydro-1H,9H-pyrrolo-[2,1-b]quinazolin-9-one part of the mol-ecule is roughly planar (r.m.s. deviation = 0.0178 Å) and is essentially coplanar with the benzil-idene ring (r.m.s. deviation = 0.0080 Å), forming a dihedral angle of 5.0 (1)°. The crystal structure is stabilized by two aromatic π-π stacking inter-actions observed between the benzene rings of neighboring mol-ecules [centroid-centroid distance = 3.7555 (19) Å.
authors.affiliation: S. Yunusov Institute of the Chemistry of Plant Substances, Academy of Sciences of Uzbekistan, Mirzo Ulugbek Str. 77, Tashkent 100170, Uzbekistan.
authors.forename: Burkhon Zh
authors.initials: BZh
authors.lastname: Elmuradov
authors.forename: Rasul Ya
authors.initials: RY
authors.lastname: Okmanov
authors.forename: Asqar Sh
authors.initials: ASh
authors.lastname: Abdurazakov
authors.forename: Bakhodir
authors.initials: B
authors.lastname: Tashkhodjaev
authors.forename: Khusnutdin M
authors.initials: KM
authors.lastname: Shakhidoyatov