14-Eth­oxy-4,6-dimethyl-9-phenyl-8,12-dioxa-4,6-diaza­tetra­cyclo­[8.8.0.0^2,7.0^13,18]octa­deca-2(7),13,15,17-tetra­ene-3,5,11-trione

In the title compound, C₂₃H₂₀N₂O₆, the fused pyrone and pyran rings each adopt a sofa conformation. The dihedral angle between the mean planes of the pyran and phenyl rings is 61.9 (1)°. In the crystal, mol­ecules are linked by two pairs of C—H...O hydrogen bonds, forming dimers. These dimers are linked via a third C—H...O hydrogen bond, forming a two-dimensional network parallel to (10-2).

14-Eth­oxy-4,6,9-trimethyl-8,12-dioxa-4,6-diaza­tetra­cyclo­[8.8.0.0^2,7.0^13,18]octa­deca-2(7),13,15,17-tetra­ene-3,5,11-trione

In the title compound, C₁₉H₂₀N₂O₆, the pyrone and pyran rings adopt envelope conformations with the same common C atom as the flap, the dihedral angle between the planes of the remaining ring atoms being 68.27 (4)°. The planar atoms of the pyran ring and the diaza­cyclic ring are almost coplanar, the dihedral angle between their mean planes being 3.29 (7)°. Moreover, the planar atoms of the pyrone ring and benzene ring of the coumarin unit are also close to coplanar, the dihedral angle between their mean planes being 8.03 (9)°. The meth­oxy group lies in the plane of the benzene ring, with a dihedral angle between their mean planes of 9.4 (2)°. In the crystal, the molecules are linked by C—H...O hydrogen bonds resulting in sheets of mol­ecules in the ac plane.

Methyl 11,14,16-triphenyl-8,12-dioxa-14,15-di­aza­tetra­cyclo­[8.7.0.0^2,7.0^13,17]hepta­deca-2(7),3,5,13(17),15-penta­ene-10-carboxyl­ate

In the title compound, C₃₃H₂₆N₂O₄, the pyrazole ring makes dihedral angles of 15.13 (7) and 60.80 (7)° with the adjacent phenyl rings. Both di­hydro­pyran rings exhibit half-chair conformations. A weak intra­molecular C—H...O inter­action occurs. In the crystal, mol­ecules are linked into inversion dimers through pairs of C—H...N inter­actions. Weak C—H...π inter­actions are also observed.

14-Meth­oxy-4,6-dimethyl-9-phenyl-8,12-dioxa-4,6-di­aza­tetra­cyclo­[8.8.0.0^2,7.0^13,18]octa­deca-2(7),13,15,17-tetra­ene-3,5,11-trione

The title compound, C₂₃H₂₀N₂O₆, crystallizes with two mol­ecules in the asymmetric unit in which the dihedral angles between the mean planes of the pyran and phenyl rings are 66.6 (1) and 61.9 (1) °. The fused pyrone and pyran rings each adopts a sofa conformation. In the crystal, C—H...O hydrogen bonds link the mol­ecules, forming a two-dimensional network parallel to [001].

16-Methyl-11-(2-methyl­phen­yl)-14-phenyl-8,12-dioxa-14,15-di­aza­tetra­cyclo­[8.7.0.0^2,7.0^13,17]hepta­deca-2(7),3,5,13(17),15-penta­ene-10-carbo­nitrile

In the title compound, C₂₈H₂₃N₃O₂, the pyrazole ring makes a dihedral angle of 16.90 (6)° with the phenyl ring to which it is attached. Both di­hydro­pyran rings exhibit half-chair conformations. Intramolecular C—H...O interactions generate S(6) and S(8) ring motifs. In the crystal, weak C—H...O and C—H...π interactions occur.