title: 2-(3-Oxo-1,3-dihydro-isobenzofuran-1-yl)-phthalazin-1(2H)-one.
abstract: The reaction of 2-carboxy-benzaldehyde and hydrazine hydrate unexpectedly yielded the title compound, C(16)H(10)N(2)O(3), which comprises one phthalide ring, one phthalazine system and a chiral centre. The phthalide unit is almost perpendicular to the phthalazine system, forming a dihedral angle of 87.1 (3)°. The packing is governed by weak C-H⋯O hydrogen-bonding inter-actions, forming layers parallel to the ab plane.
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou 510006, People's Republic of China.
authors.forename: You-Lei
authors.initials: YL
authors.lastname: Zhang
authors.forename: Yu-Jun
authors.initials: YJ
authors.lastname: Wu
authors.forename: Guo
authors.initials: G
authors.lastname: Peng
authors.forename: Hong
authors.initials: H
authors.lastname: Deng