Helliwell Madeleine, Nasiopoulou Despina A, Harris Philip A, Kotali Antigoni, Joule John A
Acta Crystallogr Sect E Struct Rep Online. 2011 Apr 1;67(Pt 4):o1014. doi: 10.1107/S1600536811010907. Epub 2011 Mar 31.
The title compound, C(16)H(12)N(2)O(4)S, was obtained by the condensation of 3-acetyl-4-hy-droxy-coumarin with thien-2-ylcarbonyl hydrazide. The pyran ring adopts a 2,4-dione tautomeric form. The benzopyran ring system is almost coplanar with the thio-phene ring [dihedral angle 0.9 (2)°]. The exocyclic C=C double bond has an E geometry. The mol-ecular conformation is stabilized by an intra-molecular N-H⋯O hydrogen bond. In the crystal, inter-molecular N-H⋯O hydrogen bonds link the mol-ecules into chains along the a axis.
标题化合物C(16)H(12)N(2)O(4)S是由3-乙酰基-4-羟基香豆素与噻吩-2-基羰基肼缩合得到的。吡喃环采用2,4-二酮互变异构形式。苯并吡喃环系统与噻吩环几乎共面[二面角0.9 (2)°]。环外C=C双键具有E构型。分子构象通过分子内N-H⋯O氢键得以稳定。在晶体中，分子间N-H⋯O氢键将分子沿a轴连接成链。
