Meth­yl 3-amino-1-(2-chloro­phen­yl)-9-meth­oxy-5,6-dihydro-1H-naphtho[2,1-b]pyran-2-carboxyl­ate

The title compound, C₂₂H₂₀ClNO₄, was synthesized by the reaction of meth­yl 3-(2-chloro­phen­yl)-2-cyano­acrylate and 7-meth­oxy-1,2,3,4-tetra­hydro­naphthalen-2-one in ethanol catalyzed by KF-alumina. X-ray analysis reveals that the pyran ring adopts a half-chair conformation, while the cyclo­hexene ring bonded to the pyran moiety has a skew-boat form.

Ethyl 6-amino-5-cyano-2-methyl-4-phenyl-4H-pyran-3-carboxyl­ate

The title compound, C₁₆H₁₆N₂O₃, was synthesized by the reaction of phenyl­methyl­idene­malono­nitrile and ethyl aceto­acetate in the presence of triethyl­benzyl­ammonium chloride in an aqueous medium. The pyran ring adopts a boat conformation. The phenyl ring and the basal plane of the pyran ring make a dihedral angle of 94.5 (2)°. Intermolecular N—H...O and N—H...N hydrogen bonds link the mol­ecules into ribbons along the a axis.

Meth­yl 4-(3-chloro­phen­yl)-2,7,7-trimeth­yl-5-oxo-1,4,5,6,7,8-hexa­hydro­quinoline-3-carboxyl­ate

The title compound, C₂₀H₂₂ClNO₃, was synthesized by the reaction of 3-chloro­benzaldehyde, 5,5-dimeth­yl-1,3-cyclo­hexane­dione and meth­yl 2-amino­crotonate in an ionic liquid medium. The X-ray analysis reveals that the nitro­gen-containing ring adopts a boat conformation and the cyclo­hexene ring has a half-chair conformation. Inter­molecular N—H...O bonds in the structure lead to the formation of chains.