Heterogeneous catalytic synthesis and structure of 5,5a,10a,11-tetrahydro-10 H-indeno[1,2-b]quinoline

Hydrogenation of 10 H-indeno[1,2-b]quinoline in benzene in the presence of R2S7 {Mathematical expression} gave 5,5a,10a,11-tetrahydro-10 H-indeno[1,2-b]quinoline, the structure of which was established by mass-, IR, UV,13C, and1H NMR spectra. The cis fusion of the indan and tetrahydroquinoline fragments, the axial orientation of the proton at C(5a), and the equatorial orientation of the proton at C(10a) were confirmed by molecular mechanics calculations using the PC MODEL program. © 1995 Plenum Publishing Corporation.