Muthukumaran J, Parthiban A, Manivel P, Rao H Surya Prakash, Krishna R
Acta Crystallogr Sect E Struct Rep Online. 2011 Jun 1;67(Pt 6):o1395-6. doi: 10.1107/S1600536811017338. Epub 2011 May 14.
In the title compound, C(20)H(23)N(3)O(3), the dihydro-pyran ring adopts half-chair conformation. The chromene system makes a dihedral angle of 87.35 (5)° with the adjacent benzene ring. An intra-molecular N-H⋯O hydrogen bond generates an S(6) motif, which stabilizes the mol-ecular conformation. In the crystal, weak inter-molecular C-H⋯O hydrogen bonds contribute to the stabilization of the packing.
在标题化合物C₂₀H₂₃N₃O₃中,二氢吡喃环呈半椅式构象。色烯体系与相邻苯环形成的二面角为87.35 (5)°。分子内N—H⋯O氢键形成一个S(6)基序,稳定了分子构象。在晶体中,弱的分子间C—H⋯O氢键有助于堆积结构的稳定。