Acta Cryst. (2013). E69, o1053-o1054 [ doi:10.1107/S1600536813014530 ]
Abstract: The title compound, C16H15ClN2O4, contains a chiral centre and crystallizes as a racemate. The methylene group -positioned to the carbonyl group is partially (21%) disordered. It flips to the opposite sides of the corresponding six-membered carbocycle by -0.304 (3) and 0.197 (11) Å, producing alternative envelope conformations. The planes of the pyran and chlorophenyl rings form a dihedral angle of 86.25 (9)°. The molecular structure is characterized by an intramolecular N-HO interaction, which generates an S(6) ring motif. The corresponding amino N atom deviates from the plane of the pyran ring by 0.1634 (19) Å. In the crystal, molecules are linked via C-HO hydrogen bonds, forming C(8) chains running parallel to the b-axis direction. The crystal structure also features C-H interactions.
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