title: 1-Phenyl-6,7,8,9-hexa-hydro-1H,5H-cyclo-hepta-[1',2':2,3]pyrido[6,5-c]pyrazol-4-amine: a new tacrine analogue.
abstract: The title compound, C(17)H(18)N(4), contains a pyrazolopyridine system fused with a seven-membered carbocyclic ring. The pyrazole ring is coplanar with the pyridine ring, while the phenyl ring is twisted by a dihedral angle of 14.38 (14)° with respect to the pyridine ring. The seven-membered ring displays a chair conformation. The packing is stabilized by N-H⋯N hydrogen bonds and N-H⋯π(arene) inter-actions.
authors.affiliation: School of Chemical Engineering and the Environment, Beijing Institute of Technology, Beijing 100081, People's Republic of China.
authors.forename: Lijun
authors.initials: L
authors.lastname: Zhang
authors.forename: Daxin
authors.initials: D
authors.lastname: Shi
authors.forename: Jiarong
authors.initials: J
authors.lastname: Li
authors.forename: Ling
authors.initials: L
authors.lastname: Zhang
authors.forename: Yanqiu
authors.initials: Y
authors.lastname: Fan