title: Diethyl 4-(2-meth-oxy-phen-yl)-2,6-di-methyl-1,4-di-hydro-pyridine-3,5-di-carboxyl-ate.
abstract: In the title compound, C20H25NO5, the di-hydro-pyridine ring adopts a flattened boat conformation. The meth-oxy-phenyl ring is almost perpendicular to the mean plane of the pyridine ring [dihedral angle = 88.42 (3)°]. The two carbonyl units adopt a synperiplanar conformation with respect to the double bonds in the di-hydro-pyridine ring. In the crystal, mol-ecules are connected by N-H⋯O hydrogen bonds into R 4 (4)(24) tetra-meric rings. A region of disordered electron density, located at the center of four adjacent mol-ecules, was treated with the SQUEEZE routine in PLATON [Spek (2009 ▶). Acta Cryst. D65, 148-155]. It is probably the result of traces of the solvent of crystallization and was not taken into account during the structure refinement.
authors.affiliation: Catalytic Hydrogenation Research Center, Zhejiang University of Technology, Hangzhou 310014, People's Republic of China.
authors.forename: Ke
authors.initials: K
authors.lastname: Wang
authors.forename: Yifeng
authors.initials: Y
authors.lastname: Wang
authors.forename: Minjie
authors.initials: M
authors.lastname: Yao
authors.forename: Danqian
authors.initials: D
authors.lastname: Xu