Received 25 April 2013
The title compound, C14H13NO3, adopts a twisted conformation in the crystal, with an interplanar angle between the two benzene rings of 87.30 (5)°. Molecules within the structure are linked via O-HO interactions, forming a hydrogen-bonded chain motif with graph set C(7) along the glide plane in the  direction.
For related phthalamic acid structures, see: Smith et al. (1983) and Bocelli et al. (1989). For the structure of a diaryl amide containing the 2-methoxyphenyl moeity, see: Parra et al. (2001). A description of hydrogen bonding in terms of graph sets is given by Etter (1990) and Bernstein et al. (1995). For standard bond lengths as calculated using crystal structure data, see Allen et al. (2006).
Data collection: CrystalClear-SM Expert (Rigaku, 2009); cell refinement: CrystalClear-SM Expert; data reduction: CrystalClear-SM Expert; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: WinGX (Farrugia, 2012).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: GW2134 ).
JMC thanks the Royal Society for a University Research Fellowship, the University of New Brunswick for the UNB Vice-Chancellor's Research Chair, and NSERC for the Discovery Grant 355708 (for PGW).
Allen, F. H., Watson, D. G., Brammer, L., Orpen, A. G. & Taylor, R. (2006). International Tables for Crystallography, Vol. C, ch. 9.5, pp. 790-811. International Union of Crystallography.
Bernstein, J., Davis, R. E., Shimoni, L. & Chang, N.-L. (1995). Angew. Chem. Int. Ed. Engl. 34, 1555-1573.
Bocelli, G., Rizzoli, C. & Ori, O. (1989). Z. Kristallogr. 189, 301-316.
Etter, M. C. (1990). Acc. Chem. Res. 23, 121-126.
Farrugia, L. J. (2012). J. Appl. Cryst. 45, 849-854.
Higashi, T. (1995). ABSCOR. Rigaku Corporation, Tokyo, Japan.
Parra, R. D., Zeng, H., Zhu, J., Zheng, C., Zeng, X. C. & Gong, B. (2001). Chem. Eur. J. 7, 4352-4357.
Rigaku (2009). CrystalClear-SM Expert. Rigaku Corporation, The Woodlands, Texas, USA.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Smith, G., Kennard, C. H. L. & Katekar, G. F. (1983). Aust. J. Chem. 36, 2455-2463.