Ethyl 23-benzyl-8,11,14-trioxa-23,28,29-triaza­penta­cyclo­[19.7.1.0^2,7.0^15,20.0^22,27]nona­cosa-2,4,6,15(20),16,18,21,26-octa­ene-26-carboxyl­ate

The title compound, C₃₃H₃₅N₃O₅, is the product of the multicomponent condensation of 1-benzyl-4-eth­oxy­carbonyl­piperidin-3-one with 1,5-bis­(2-formyl­phen­oxy)-3-oxapentane and ammonium acetate. The mol­ecule comprises a penta­cyclic system containing the aza-14-crown-4-ether macrocycle, tetra­hydro­pyrimidine, tetra­hydro­pyridine and two benzene rings. The aza-14-crown-4-ether ring adopts a bowl conformation with a dihedral angle of 62.37 (5)° between the benzene rings. The tetra­hydro­pyrimidine ring has an envelope conformation with the chiral C atom as the flap, whereas the tetra­hydro­pyridine ring adopts a distorted chair conformation. Two amino groups are involved in intra­molecular N—H...O hydrogen bonds. In the crystal, weak C—H...O hydrogen bonds link the mol­ecules into layers parallel to the ab plane.

1-Methyl-3-(2-oxo-2H-chromen-3-yl)-1H-imidazol-3-ium picrate

The title salt, C₁₃H₁₁N₂O₂⁺·C₆H₂N₃O₇⁻, is the unexpected product of a domino reaction of 3-cyano­methyl-1-methyl­imidazolium chloride with salicylic aldehyde in the presence of picric acid. In the cation, the 1H-imidazole ring is twisted by 63.2 (1)° from the 2H-chromen plane. In the crystal, cations and anions are alternately stacked along the a axis through π–π stacking inter­actions between the almost parallel aromatic rings [centroid–centroid distances = 3.458 (2) and 3.678 (2) Å]. The stacks are further linked by C—H...O hydrogen bonds into a two-tier layer parallel to (001).

(1R*,21S*,22R*,24S*)-Methyl ethyl 2-[23-hy­droxy-22,24-diphenyl-8,11,14-trioxa-25-aza­tetra­cyclo­[19.3.1.0^2,7.0^15,20]penta­cosa-2,4,6,15(20),16,18-hexaen-25-yl]but-2-enedioate

The title compound, C₄₀H₄₁NO₈, is a product of the reduction of the cyclic carbonyl group of the γ-piperidone subunit of the aza-14-crown-4 ether with subsequent re-esterification of its dimethyl butenoate substituent into a monoethyl monomethyl group. The aza­crown macrocycle exhibits a bowl conformation with a dihedral angle of 70.82 (5)° between the benzene rings fused to it. The piperidine ring adopts a chair conformation and the methyl ethyl ethyl­enedi­carboxyl­ate fragment has a cis conformation, with a dihedral angle of 66.51 (7)° between the two carboxyl­ate groups. The ethyl group is disordered over two sites with occupancies of 0.70 (1):0.30 (1). In the crystal, mol­ecules form inversion dimers, via pairs of O—H...O hydrogen bonds, that stack along the a axis.