title: 1,1-Bis(4-fluoro-phen-yl)-3,4-dihydro-1H-1,3-oxazino[3,4-a]indole.
abstract: The title compound, C(23)H(17)F(2)NO, which crystallizes with two independent mol-ecules in the asymmetric unit, was prepared by the cyclization of 4-[2-bis-(4-fluoro-phen-yl)methyl-eneamino]but-3-yn-1-ol at room temperature. The mol-ecules display a tripod conformation. The two fluoro-phenyl rings make dihedral angles of 79.26 (2) and 85.87 (1)° [86.53 (1) and 83.67 (2)° in the second mol-ecule] with the indole ring, and the dihedral angles between the fluoro-phenyl rings are 67.74 (2) and 66.33 (2)°, respectively. Furthermore, the indole rings are located on the edge of the respective oxazine half-chair ring systems. Nonconventional C-H⋯π contacts between indole and fluoro-phenyl rings are observed.
authors.affiliation: College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471022, People's Republic of China.
authors.forename: Weijun
authors.initials: W
authors.lastname: Fu
authors.forename: Dongsheng
authors.initials: D
authors.lastname: Deng
authors.forename: Dongfeng
authors.initials: D
authors.lastname: Hong
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Wang
authors.forename: Baoming
authors.initials: B
authors.lastname: Ji