Crystal structure of methyl 1-methyl-3,5-diphenyl-7-tosyl-3,6,7,11b-tetra­hydro­pyrazolo­[4′,3′:5,6]pyrano[3,4-c]quinoline-5a(5H)-carboxyl­ate

In the title compound, C₃₅H₃₁N₃O₅S, the piperidine ring adopts an envelope conformation, with the methine C atom as the flap, and the pyran ring adopts a sofa conformation. The mean planes of these two rings are almost normal to one another, making a dihedral angle of 85.96 (5)°. The two phenyl rings, one attached to the pyrazole ring and the other to the pyran ring, are inclined to one another by 65.41 (11)°. They are inclined to the mean planes of the rings to which they are attached by 12.59 (11) and 70.09 (9)°, respectively. There is an intra­molecular C—H...π inter­action involving the tosyl­ate methyl group and the phenyl ring attached to the pyrazole ring. In the crystal, mol­ecules are linked by C—H...π inter­actions, forming ribbons parallel to (10-2). The ribbons are linked by slipped parallel π–π inter­actions involving inversion-related pyrazole rings [inter-centroid distance = 3.672 (2) Å], forming slabs parallel to (001). A preliminary report of this structure has been published [Bakthadoss et al. (2014). Eur. J. Org. Chem. pp. 1505–1513].