Synthesis and Crystal Structure of 8-(2,3-Dimethoxyphenyl)-10,11,12,13-tetrahydro-9H-benzo [f] cyclohepta [c] quinoline

The title compound 8-(2,3-dimethoxyphenyl)-10,11,12,13-tetrahydro-9H-benzof]-cycloheptac]quinoline (C26H25NO2, Mr = 383.47) was synthesized and characterized by IR, 1H NMR, 13C NMR and elemental analysis. The crystal belongs to triclinic, space group P with a = 8.1490(16), b = 9.2550(19), c = 14.373(3) A,α = 86.96(3), β= 89.66(3), γ= 70.32(3)°, Z = 2, V= 1019.2(4) A3, Dc = 1.250 g·cm-3,μ(MoKa) = 0.078 mm-1, F(000) = 408, the final R - 0.0555 and wR = 0.1240 for 2228 observed reflections (I > 2σ(I)). X-ray analysis reveals that the seven-numbered ring is slightly similar to a six-numbered ring, forming the chair-like conformation. The four rings (Ⅰ, Ⅱ, Ⅲ and Ⅳ) in the benzof]cycloheptac]quinoline moiety form a screw structure. flections