Acta Cryst. (2008). E64, o2155  [ doi:10.1107/S1600536808033849 ]

2,2-Dimethyl-2,3-dihydropyrano[2,3-a]carbazol-4(11H)-one

M. Sridharan, K. J. R. Prasad, A. Ngendahimana and M. Zeller

Abstract: The title compound, C₁₇H₁₅NO₂, was prepared from 1-hydroxycarbazole and 3,3-dimethylacrylic acid with a mixture of AlCl₃ and POCl₃ as the cyclization catalyst. Owing to the presence of the -CMe₂- group, the molecule is not quite planar. In the crystal structre, strong N-HO hydrogen bonds and weaker C-H interactions occur, and a slipped - stacking interaction [centroid-centroid separation = 3.8425 (8) Å] is also observed.

Online 22 October 2008

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